San Juan Water Conservancy (#NM) official says status of local watersheds is better than other areas of Southwest — The Farmington Daily-Times #CRWUA2022

New Mexico Lakes, Rivers and Water Resources via Geology.com.

Click the link to read the article on the Farmington Daily-News webisite (Mike Easterling). Here’s an excerpt:

A presentation for San Juan County commissioners on the status of local watersheds on Sept. 6 illustrated that while the Four Corners region remains locked in the grip of a long-running drought, it is in relatively good condition compared to other parts of the Southwest. The 14-minute presentation delivered by Aaron Chavez, executive director of the San Juan Water Commission, was designed to bring commissioners up to speed on the health of the county’s two main watersheds, those associated with the Animas and San Juan rivers.

New Mexico Drought Monitor map September 6, 2022.

But Chavez, who is beginning a two-year term as president of the Colorado River Water Users Association, also devoted a significant amount of attention to the status of that watershed, which serves as a crucial water supplier to tens of millions of residents of New Mexico, Colorado, Wyoming, Utah, Arizona, Nevada, California and Mexico…Chavez began his presentation by noting that while last winter’s snowpack in southwest Colorado was close to normal, it did not yield the kind of runoff one might have expected because the soil moisture content in the region was down substantially after years of substandard precipitation…

Nevertheless, most of the indicators Chavez examined this year were an improvement over the recent past, he said, as he noted the Four Corners area has had a good monsoon season this year that has helped make up for the relatively poor spring runoff. Most river basins in the area, he said, are at 90% to 100% of average…

According to figures from the U.S. Bureau of Reclamation cited by Chavez, Navajo Lake was 55% full as of Aug. 24 โ€” a level that was roughly equal to other local reservoirs, as Vallecito Lake northeast of Durango, Colorado, was at 49% and McPhee Reservoir north of Cortez, Colorado, was at 53%. The good news was that Lake Nighthorse west of Durango was listed at 99% full…But those figures stood in sharp contrast to the Southwest’s two mammoth reservoirs fed by the Colorado River. Lake Powell in Utah and Arizona was only 26% full, while Lake Mead in Nevada and Arizona was at only 28% of capacity.

#Maybell project addresses problems for irrigators, boaters, fish — @AspenJournalism

The Maybell Ditch headgate in the lower left pulls water from the Yampa River for irrigation. A major reconstruction project will fix the diversion structure to create better passage for fish and boats.ย CREDIT:ย HEATHER SACKETT/ASPEN JOURNALISM

Click the link to read the article on the Aspen Journalism website (Heather Sackett):

The Maybell Ditch is the largest diversion on the Yampa River and irrigates about 2,500 acres of grass and alfalfa in northwest Colorado. But the remote and antiquated headgate, along with a hazardous diversion structure and 18 miles of nearly flat canal, create problems for irrigators, boaters and endangered fish alike.

Now the Maybell Irrigation District and The Nature Conservancy are working together on an ambitious project to rehabilitate and modernize the historic structure with the goal of improving conditions for all the water users on this stretch of river. So far, TNC has secured about $3.5 million in funds for the project, which it hopes can begin next summer.

Yampa River Basin via Wikimedia.

The Yampa River flows from the Flat Tops Wilderness, through the city of Steamboat Springs, then turns west and eventually joins with the Green River in Dinosaur National Monument. Along the way it turns the semi-arid landscape of Routt and Moffat counties into a ribbon of green, irrigated meadows.

In recent years the Yampa has started experiencing issues that have long been a part of other river basins like over-appropriation, calls and water shortages.

โ€œThat reach has seen declines in water levels over time with drought and long-term climate impacts,โ€ said Jennifer Wellman, TNC project manager. โ€œ(The Maybell Ditch project) was one of those that rose to the surface where we could hopefully work with the water users to have a greater impact in that basin โ€ฆ . That whole reach is really special, and it warrants more water if itโ€™s available, especially during the low flow periods.โ€

This map shows the 18 miles of the Maybell Ditch, which irrigates land with water from the Yampa River. The Nature Conservancy is planning an overhaul and modernization of the headgate and diversion structure.

Challenges for irrigators, boaters, fish

Maybell Irrigation District manager Mike Camblin said historically some ranchers couldnโ€™t get their full amount of water unless the ditch, which was constructed in the 1890s, was running full blast.

โ€œWe had one field where if the ditch wasnโ€™t full, they couldnโ€™t get it wet because there wasnโ€™t enough elevation to it,โ€ he said. โ€œIt was too flat.โ€

That meant more water was being sent through the ditch as โ€œpush waterโ€ to make sure flows make it to dry fields. It also meant more water was flowing back into the Yampa River at the end of the approximately 18-mile-long ditch, known as tailwater. If thereโ€™s too much tailwater, that can mean a ditch is taking more out of the river than it is able to use, a no-no according to the state Division of Water Resources.

A first round of improvements to the ditch added a liner to reduce seepage and check structures, which slow the flow of water. Those measures only partially addressed the issues.

The project that is now being proposed is much more extensive and involves reconstructing the diversion and modernizing the headgate, which controls the flow of water from the river into the ditch. By fixing a grade control structure โ€” essentially arranging boulders in mid-stream that push up the water in the river upstream of the headgate โ€” it creates more elevation to allow gravity to move water into the ditch, which should reduce the need to push water. It will also smooth out a passage for both fish and boats.

The twin, circular headgates of the Maybell Ditch are rusted, antiquated and must be open and closed manually. A modernization project includes plans to make it possible to operate the headgate remotely.CREDIT:ย HEATHER SACKETT/ASPEN JOURNALISM

Remote location

The twin, circular, century-old headgates are rusted and hard to operate.

โ€œThereโ€™s no way those things are easy to adjust,โ€ said Erin Light, Division 6 engineer at the state Division of Water Resources. โ€œQuite frankly, if the water commissioner had to adjust it, I donโ€™t think he or she could. We would have to rely on (the irrigation district) to do that, which is not preferred.โ€

The remote location of the headgate โ€” a three-mile round trip hike down the rugged Juniper Canyon off an already-remote dirt road โ€” is a challenge for the district. When all the headgates on the ditch are opening and closing according to the differing schedules and water needs of the irrigators, it can be hard to coordinate the manual operation of the main headgate. The new headgate will be automated and controlled remotely.

โ€œThatโ€™s a four- or five-hour deal by the time you drive up there, walk up there, adjust it and drive home,โ€ Camblin said. โ€œThe automation on that will be huge. As far as management, it will be our biggest tool.โ€

But construction wonโ€™t be easy. Heavy equipment canโ€™t make it down to the river along the ditch and will have to access the diversion using newly constructed roads on Bureau of Land Management land. The BLM considers the ditch a cultural resource and project proponents will have to be careful to avoid impacts to it.

Western Colorado Area Manager for JUB Engineers Luke Gingerich explained the complexities of the project on a site visit in July.

โ€œThey are going to have to create a couple miles of nice road to get in,โ€ Gingerich said. โ€œIt will be a large disturbance and weโ€™ve got to come back and make sure we return this as close as we can to the condition it was in before.โ€

According to Camblin, it was the federal Upper Colorado River Endangered Fish Recovery Program that first pushed the district to take a look at where it could manage its water better. That stretch of river is designated critical habitat for species of endangered fish. Water is released out of the upstream Elkhead Reservoir for the fish, and the new automated headgate will allow the Maybell Ditch to more easily let that water flow past it, to get to where itโ€™s needed.

The Maybell Ditch diversion, located in Juniper Canyon in northwest Colorado, takes water from the Yampa River to irrigate hay fields. The Nature Conservancy is fundraising for a project that would overhaul and modernize the diversion structure and headgate.CREDIT:ย HEATHER SACKETT/ASPEN JOURNALISM

Boon for boaters

The diversion reconstruction project will also be a boon for boaters. River advocacy nonprofit Friends of the Yampa said in a letter of support for the project that the Maybell Diversion is the most significant barrier for safe, passable recreation along a 200-mile stretch of the Yampa River. Boaters often have to get out to portage the rapid formed by the diversion structure. The new diversion will create a boat passage, connecting two sections of boatable river.

At Julyโ€™s site visit, recreation and education coordinator for Friends of the Yampa Kent Vertrees said heโ€™s grateful for the collaboration between the agriculture, recreation and environmental water users.

โ€œAs a recreation person, Iโ€™ve said all along we get the dregs of all the other water users,โ€ Vertrees said. โ€œWe rely on agriculture more than anyone to make sure thereโ€™s water in the river. Itโ€™s really great, our partnerships in northwest Colorado.โ€

But that partnership was a bit of a hard sell at first, Camblin said. Some Maybell Ditch irrigators were skeptical about a project spearheaded by an environmental group. Tensions can sometimes run high between irrigators, who take water out of rivers, and environmental groups, who want to leave water in rivers. Camblin said the district held several meetings between irrigators and TNC to assure water users their water rights or how they manage their ranch wouldnโ€™t be threatened.

โ€œOne of our goals we talked about when we started this was, we wanted to show people the agriculture community can work with groups they donโ€™t normally work with,โ€ Camblin said. โ€œWe are hoping other ag communities say, โ€˜Hey, you know what? Some of this stuff is possible. I might have to reach across the table to make it work but this will be a beneficial project to so many people.โ€™โ€

The headgate and diversion reconstruction could come with a hefty price tag and TNC is still fundraising for what could end up costing more than originally thought due to supply chain interruptions and inflation. The project has secured almost $3.5 million so far, nearly $2 million of which comes from a Bureau of Reclamation WaterSMART grant. The Colorado Water Conservation Board has contributed about $1 million so far; the Colorado River Water Conservation District will give $500,000; $40,000 will come from the Yampa River Fund and the irrigation district is also contributing money and in-kind resources. However, the total final price tag remains unknown and is likely to be higher than whatโ€™s already been secured. Wellman said some of the additional funding needed will also come from the National Resources Conservation Service.

Aspen Journalism covers water and rivers in collaboration with The Aspen Times. This story appeared in the Sept. 11 edition ofย The Aspen Times.

With #monsoon2022 season over in #Colorado, persistent #drought could be โ€˜second fire seasonโ€™ — The #Aspen Times

Last night’s storm (July 30, 2021) was epic — Ranger Tiffany (@RangerTMcCauley) via her Twitter feed.

Click the link to read the article on the Aspen Times website (Cassandra Ballard). Here’s an excerpt:

On Thursday [September 8, 2022], a minor fire popped up on the line between two fire districts in Grand Valley, the Colorado River Fire Rescue District and the Grand Valley Fire Protection District. It was quickly contained, but it could be a sign of things to come this fall if the Western Slopeโ€™s drying trend continues as forecast by the National Weather Service through November.

โ€œAs things dry out, those kinds of fires are common,โ€ said Chief Lief Sackett of Colorado River Fire Rescue. โ€œJust knowing how brown and cured out all the grass is this time of year, and how dry and hot itโ€™s been, those are common fires.โ€

The good news is the worst extent of the anticipated heat is finally over, and a little rain should be coming.

This week’s Topsoil Moisture Short/Very Short by @usda_oce #drought

Increases in most of the West and Plains states (except, not surprisingly, TX) led to a 1% increase across the Lower 48. 49% of topsoil moisture in the Lower 48 is now short/very short.

Renewable Natural Resources Foundation Round Table: The Challenges of Allocating #ColoradoRiver Water โ€“ Hot 20-year #drought and soaring populations #COriver #aridification

Brad Udall: Hereโ€™s the latest version of my 4-Panel plot thru Water Year (Oct-Sep) of 2021 of the Colorado River big reservoirs, natural flows, precipitation, and temperature. Data (PRISM) goes back or 1906 (or 1935 for reservoirs.) This updates previous work with @GreatLakesPeck. Credit: Brad Udall via Twitter

Click the link to read the article on the Renewable Natural Resources Foundation website (Stephen Yaeger):

Senior water and climate research scientist at Colorado State University and one of the authors of the National Climate Assessment. Photo credit: Colorado State University Water Institute

Brad Udall,ย a Senior Water and Climate Research Scientist at Colorado State University, spoke at a virtual meeting of the RNRF Washington Round Table on Public Policy on March 9, 2021. He discussed the imbalance between water supply and demand in the Colorado River basin, how climate change is exacerbating the issue, and the ongoing renegotiation of the riverโ€™s management guidelines.

Introduction and Background

The Colorado River basin extends into seven states (Wyoming, Colorado, Utah, Arizona, New Mexico, Nevada, and California) as well as Mexico, along with the land of 29 Native American tribes. The American portion of the basin represents 8% of the area of the lower 48 states. Altogether, about 40 million people, including the populations of all major cities in the Southwestern U.S., rely on the Colorado for some portion of their water supply. The river is used heavily for municipalities as well as agriculture, with about 4.5 million acres of irrigated land in the basin.

The water supply in the river is often measured by the water levels in its two major reservoirs, Lake Mead and Lake Powell. These are the two biggest reservoirs in the U.S. In order to maintain sustainable levels in these two reservoirs over a long time period, withdrawals from the river must equal the supply being provided by the riverโ€™s flow. This was the case in 2000, when the combined contents of the reservoirs were over 90% full. Since then, their water level has dwindled to less than 50% due to a โ€œstructural deficitโ€ โ€“ demand for the riverโ€™s water consistently outpacing supply. This is due in large part to the fact that over the past 20 years, the basin has been experiencing its worst drought on record. The flow of the river has decreased from ~14.75 million acre-feet (maf) to ~12.4 maf. Even before the drought began, water demand was high in the basin; since about 1990, it has not reliably reached the ocean.

While the current situation in the watershed is usually described as a drought, a lack of precipitation is really only half the story. Regional temperature increases, exacerbated by climate change, have also had a significant impact on the reduction of water availability. Udall noted that evaporative losses will only become more severe as climate change worsens. The Southwest is already one of the quickest-warming areas of the country, a trend that is expected to continue. The risk of multidecadal droughts will also continue to drastically increase in coming decades. The 2000-2018 period was the second-driest 19-year period in the basin since 800 AD. While this is partially attributed to natural variation, researchers have said that 50% of the decrease in soil moisture can be attributed to anthropogenic climate change. Climate change has turned what would likely be a moderate drought into an extreme, historic drying event. Aridification and heating, along with reduction in precipitation, are causing drastically drying conditions in a river basin that tens of millions of people rely on for their water.

Historical Management of the River

In 1922, to fully allocate use of the riverโ€™s water, the basin states agreed to the Colorado River Compact. This agreement still serves as the basis for the Law of the River, which is the set of rules for the riverโ€™s allocation and management. In response to the โ€œhot droughtโ€ happening since 2000, new modifications to the Law of the River have been necessary to prevent the reservoirs from becoming depleted. The first of these, called the Colorado River Interim Guidelines, went into effect in 2007. These guidelines set out a series of complicated rules for how Lakes Powell and Mead are operated, allowing different quantities of water to be released from them when they are at certain elevations. They constrain use of water when the reservoirs are low. One innovative structure used to accomplish this is โ€œintentionally created surplus,โ€ which allows parties in the lower basin to store their water in a sort of โ€œbank accountโ€ in Lake Mead.

Around 2013, it was becoming clear that persistently dry and hot conditions were rendering the 2007 Interim Guidelines insufficient. A new agreement was necessary. As a result, two new โ€œDrought Contingency Plansโ€ (DCPs) for the Upper and Lower Basins were adopted in 2019. Early in 2021, for the first time, drought conditions in the river reached the point where the DCPsโ€™ provisions were activated. Udall noted that these agreements made some progress toward making the riverโ€™s use more sustainable but were not a permanent solution.

Future Management of the River

Udall finished his presentation by discussing future prospects for sustainably managing the river in these drying conditions. In 2026, the 2007 Interim Guidelines and DCPs expire. The seven basin states, 29 tribes, Mexico, and the federal government have already begun the multi-year process of renegotiating a new set of guidelines which will be adopted in 2027. The following are some central considerations for a successful new agreement described by Udall.

The Upper Basinโ€™s โ€œDeliveryโ€ Obligation

Among the problems that stakeholders are aiming to resolve is the nature of the Upper Basinโ€™s delivery obligations. There is a clause in the original Colorado River Compact that says that the Upper Basin shall not allow the flow of the river to decline below 75 maf every ten running years. However, it is not clear if this obligation is really a โ€œdeliveryโ€ obligation or if it is a โ€œnon-depletionโ€ obligation. If it is a delivery obligation, that means that the entire reduction of flow coming from the Upper Basin due to climate change falls on the Upper Basin to solve. Clearly, this was not the intent of this clause in the original 1922 compact, and the Upper Basin states are making this argument.

Graphic credit: Chas Chamberlin/Water Education Colorado

Tribal Issues

Native American tribes are expected to have a much more significant role in the renegotiation of the Interim Guidelines than they have had in previous decision-making processes for management of the river. There are 29 tribes in the basin. Altogether, they have a right to control about 20% of the basinโ€™s water. This right derives from a 1908 Supreme Court decision which issued the โ€œWinters Doctrine.โ€ This doctrine said that when the federal government creates a reservation of land for a tribe, implicit in that reservation is a water right.

However, tribal interests were still left out of the 1922 compact, and many of their rights remain unquantified. Even in the 21stย century, the tribes in the basin were not invited to participate in the 2007 Interim Guidelines negotiations or the 2012 Basin Study. The 2019 DCPs were an important development in the inclusion of tribes in river management discussions after their needs and rights had been historically ignored. For the first time, these 29 distinct tribes were acting collectively and were included in the planning process. The DCPs were also the first time that a tribe agreed to accept a monetary payment in exchange for using less than their full water right. Inclusion of tribal interests in the renegotiation of the Interim Guidelines is expected, and will be essential to the new agreementโ€™s success.

The Structural Deficit

Fundamental to the dilemma faced by basin stakeholders in this renegotiation process is the โ€œstructural deficit.โ€ This is, quite simply, an imbalance between the supply of and demand for water in the basin. Since 2000, demand has outpaced supply. Demand reductions are challenging because once a water user has access to a supply of water, it is difficult to get them to relinquish it. The supply-side is more challenging to address. In the absence of cooler temperatures and more precipitation ยญโ€“ conditions increasingly unlikely as climate changes โ€” it is difficult to create more supply. It is easier to change consumption patterns than it is to change the hydrology of the river. Without demand reductions in the Upper and Lower Basins, there is a high probability that the amount of water in the reservoirs will continue to fall.

Udall referenced a recent study that found that the Upper Basinโ€™s water demand is unsustainably high. Despite this finding, parts of the Upper Basin actually want to increase their demand, which in the face of declining flows is an issue that will need to be addressed in the negotiation process. Demand Management measures, by which water users can voluntarily accept money in exchange for reducing their water consumption, will likely be part of the solution in the Upper Basin but caps on demand may also be necessary to ensure that the delivery obligation is fulfilled.

In the Lower Basin, the Central Arizona Project diverts water from the Colorado River into Arizona, providing water for an area including the cities of Phoenix and Tucson. As a part of the original agreement that permitted this project, it was agreed that if there ever was a shortage of water in the basin, Arizona would bear the brunt of demand reductions. Demand reductions will likely be necessary in the Lower Basin but Udall noted that it would be difficult in practice to mandate that they all come from Arizona. Solving this dilemma will be a part of the new Interim Guidelines negotiations. One method that may be used is to begin charging evaporative losses to state water budgets in proportion to their use. Currently, evaporation is being charged to nobody, which is a part of the overuse problem.

Guidelines for Successful Renegotiation

Udall also identified other steps that can be taken by stakeholders to work toward a successful new set of interim guidelines. First, he emphasized the importance of good science. Realistic climate and hydrological modelling are necessary to inform the negotiations. Udall noted that many of the models being used by watershed states are overly optimistic with regard to future hydrology. Beginning the negotiations with inaccurate presumptions about the future of the watershed are setting the new agreement up for failure. While the renegotiation is a political process, it needs to be informed by most accurate scientific information possible.

Because the structural deficit is a basin-wide issue, Udall advocated for the use of a combined metric that adds the quantity of water in Lakes Mead and Powell. This would be a more accurate way to gauge water shortages because the water in the reservoirs individually is less important than the total quantity between them when informing the management of the entire river basin. He also said that using clear language in negotiations is critical. For instance, one should never inaccurately say that the Colorado River Compact itself is being renegotiated. It is only the Interim Guidelines that are being replaced; the Compact remains the foundation for the riverโ€™s allocation.

The renegotiation process is more than just a group of stakeholders sitting around a table, working out a plan for the river. It is a series of large and small meetings, some more formal than others. Since not everything is negotiated in official sessions, there is room for behind-the-scenes discussion while also maintaining transparency. During the round tableโ€™s Q&A session, Udall mentioned that river management issues under discussion will be reported by many talented journalists, who will bring transparency to the process for interested parties.

Ultimately, the process of renegotiating the Interim Guidelines requires a balancing of political, economic, environmental, and societal values. Climate change is the defining issue of our time, and it is at the center of these water issues in the American West. While one can easily become disillusioned by political processes, especially in the realm of climate and environmental issues, Udall ended on a note of optimism. While the solutions are not all clear, there are good relationships among stakeholders, which will form a solid foundation for successful negotiations.

โ€“ย Stephen Yaeger, RNRF Program Manager

The PowerPoint Udall used during his presentation can be foundย here.

In his presentation, Udall referenced a series of studies about the climate and hydrological conditions of the Colorado River. They can be found at the following links:

Increasing influence of air temperature on upper Colorado River streamflow

The twentyโ€first century Colorado River hot drought and implications for the future

On the Causes of Declining Colorado River Streamflows

Unprecedented 21st century drought risk in the American Southwest and Central Plains

Large contribution from anthropogenic warming to an emerging North American megadrought

Colorado River flow dwindles as warming-driven loss of reflective snow energizes evaporation

When is Drought not a Drought? Drought, Aridification, and the โ€œNew Normalโ€

Alternative Management Paradigms for the Future of the Colorado and Green Rivers

Colorado River “Beginnings”. Photo: Brent Gardner-Smith/Aspen Journalism

Data Mega-Dump: Alfalfa (Part II) — @Land_Desk #ColoradoRiver #COriver #aridification

Hayfield in Orderville, Utah, irrigated with water from the East Fork of the Virgin River, a Colorado River tributary. Jonathan P. Thompson photo.

Click the link to read the article on the Land Desk website (Jonathan P. Thompson):

By now you may have heard that the Colorado River is in trouble, as are the 40 million or so people who rely on it and all the people (and livestock) that eat the crops it irrigates. Itโ€™s not the only Western river facing a crisis: The situation on the Klamath is dire and the Rio Grande pretty much dried up this summer, its demise delayed by an abundant monsoon.

The problem is simple: The collective water users are consuming more water than is actually in the river and its tributaries; that is, they are pulling about 14 million acre feet each year out of a river that only has about 12 million acre feet of water in it. And consumption continues to hold steady even as the river continues to shrink, drawing down reserves to a critically low level.ย 

Or to put it in the possibly more relatable terms of a household budget: Spending is remaining constant even as the household income shrinks. The household is running a deficit, in other words, which is rapidly emptying the savings accounts (Lakes Mead and Powell). And, on top of that, the household has outstanding debts (to tribal nations whose senior water rights have yet to be developed, honored or even quantified). The accountants have tapped into retirement accounts (Upper Basin reservoirs such as Flaming Gorge and Blue Mesa) and imposed temporary cuts (Tier 1 and 2a Shortages) to shore up the savings accounts, but it isnโ€™t enough.ย 

Spending must be dramatically and permanently slashed to better-than-sustainable levels, now, to avert crisis, allow the household to start building back its savingsโ€”and, finally, to settle those outstanding debts.ย 

Which is why Bureau of Reclamation Commissioner Camille Calimlim Touton told the collective water users in the Colorado River Basin states that they needed to figure out how to cut 2 million to 4 million acre-feet of consumption, per year. Thatโ€™s a whopping amount (Arizonaโ€™s total use is less than 2.8 million acre-feet per year). And it may not even be enough. The lower end of those cuts will just about solve the deficit spending, but it wonโ€™t be adequate to build up the savings or to settle outstanding debts. If climate change continues to shrink the river even 4 million acre-feet may not be enough.ย 

So, weโ€”the Colorado River usersโ€”must make huge cuts. And that means the biggest users of water (the biggest spenders, to go with our earlier analogy) are going to have to play a major part. The biggest user is agriculture and the thirstiest crop is hay, alfalfa in particular. Forย High Country Newsโ€™s Landline I wrote about alfalfa and the need to grow less.ย This Data Dump is intended to provide some more data to support and supplement that piece. Some of it youโ€™ve seen in previous Data Dumps, but some of it will be new.ย 

But first, a note: Iโ€™m not making value judgments here, nor am I โ€œvilifyingโ€ a particular crop, as one reader suggested. Iโ€™m not saying that alfalfa is somehow less valuable or more wasteful than almonds, or golf courses, or even your daily shower. Remember that alfalfa not only feeds beef cattle, but also dairy cattle (I canโ€™t find reliable stats on how much alfalfa goes to beef vs. dairyโ€”if anyone knows, please tell me!). So if you eat cheese or butter or ice cream, all of which are high on my list of yummy foods, youโ€™re probably eating alfalfa. Nor am I saying that we need to fallow alfalfa fieldsย insteadย of drying up golf courses or anything else (if it were up to me golf courses and turf lawns would be banned long before alfalfa, and canals covered with solar panels before alfalfa fields).

Cuts are going to have to come from across the board and across every sector. Itโ€™s just that as the biggest water user in the Colorado River Basin, alfalfa must play a part (itโ€™s just math). And according to federal agricultural data, farmers are growing less alfalfa in the Colorado River Basin than they were five years ago. That is certainly a beginning.ย 

Now, on to the numbers.ย For reference: 1 acre-foot = 325,851 gallons. Most of the stats come from the U.S. Bureau of Reclamation and the U.S. Department of Agricultureโ€™s Farm Service Agency, National Agricultural Statistics Service, Foreign Agriculture Service and Census of Agriculture.

โ€œNatural Flowโ€ is a calculation of how much water would flow in the Colorado River without any withdrawals or reservoir evaporation. In other words, itโ€™s the amount of water available for use. The 1922 Colorado River Compact assumed that there would be at least 15 million acre feet running past Leeโ€™s Ferry. Over the last two decades itโ€™s averaged in the 12 MAF to 13 MAF rangeโ€”and falling. Source: USBR
For the life of me, I cannot find a more updated version of the breakdown of consumptive uses in the entire Colorado River Basin. The USBR has Consumptive Use and Losses reports for the Upper Basin up to 2020 (see below); and โ€œaccounting reportsโ€ for the Lower Basin, which break use down by irrigation district, but not sector. So Iโ€™m relying on this. (If any readers have more up to date breakdowns, send them my way!). Total consumptive use has dropped to between 13 million and 14 million af and agriculture continues to use the lionโ€™s share of the water. Source: USBR.

2 million to 4 million acre-feetย Amount ofย additionalย cutsโ€”on top of those already made this year and last year under the emergency shortage declarationsโ€”Colorado River water users need to make to bring consumption in line with water supplies. Thatโ€™s enough to fill 1.8 million to 2.2 million Olympic-size swimming pools; or 222,222 Kim Kardashians-worth (see data point below).

244,635 acre-feetย Amount of Colorado River water Nevada is forecast to use this year, nearly all of which goes to Las Vegas and neighboring cities. The stateโ€™s water users withdraw about 450,000 acre feet from Lake Mead, but then return about 230,000 acre-feet in the form of treated wastewater via the Las Vegas Wash.

39ย Number of golf courses in Las Vegas

459 acre-feetย Average annual water used to irrigate a golf course in the Southwest, according to the U.S. Golf Association.ย 

300ย Number of golf courses in Arizona, according to Golf Arizona.

921ย Number of golf courses in California.

3.18 million gallons per acre (9.76 af)ย Amount of water needed per year to keep grass alive in the Mojave Desert. Thatโ€™s about twice as much as what alfalfa requires.

13,455 square feetย Size of an Olympic-size swimming pool, which holds 1.8 acre feet of water. ย 

600 square feetย Maximum size of a swimming pool in Las Vegasโ€™ new building code, which SNWA says will save 32 million gallons of water over the next decade.ย 

470 square feetย Average size of a Las Vegas residential swimming pool, but some are over 3,000 square feet.ย 

2.2 millionย Approximate number of residential swimming pools of all sizes in the seven Colorado River Basin states.

232,000ย Gallons of water over the maximum limit Kim Kardashian used at her L.A. property in June (about .7 acre-feet). If she were to continue that rate of excessive use sheโ€™d consume about 9 acre-feet per yearโ€”or twice as much as alfalfa.

145ย million gallonsย Dailyย consumptive water useย of power plants in Colorado River Basin states, which amounts to about 162,000 acre-feet per year.ย 

Okay, those numbers are there to give some perspective, and to show that, yes, golf and lawns and soccer and football fields and coal power plants and Los Angeles celebrities use a bunch of water. And now letโ€™s look at alfalfa:

This is the breakdown of water use for the Upper Basin (Colorado, Utah, Wyoming, New Mexico) only. Agriculture guzzles the lionโ€™s share of the water, as you can see. You may also notice that the Upper Basin uses less water than California, alone. That may seem unfair, but itโ€™s how the Colorado River Compact was set up: The Upper Basin states arenโ€™t guaranteed a set amount, they just get whatโ€™s left over after delivering 7.5 MAF per year to the Lower Basin. Lately that has not been very much. USBR.
The Imperial Irrigation District is by far the biggest single water user on the Colorado River, consuming about 850 billion gallons per year, nearly all of which is used for agriculture in the Imperial Valley. As much as one-third of that water was used to irrigate alfalfa, based on 2017 USDA agriculture census figures. *This figure for the Southern Nevada Water System does not account for Las Vegas Wash return flows, which are subtracted from this amount (to arrive at a net total of about 245,000 af). USBR.

2 to 6 acre-feet
Amount of water needed annually to irrigate an acre of alfalfa, depending on location and climate. In Coloradoโ€™s San Luis Valley alfalfaย consumes about 2 acre-feetย per year, while in Californiaโ€™s Imperial Valley it can be aย bit more than 6 acre-feet annually. Most other places fall somewhere in between.

4.1 millionย Acres of irrigated agricultural land in Utah, Arizona and Colorado in 2017.

2.7 millionย Acres of irrigated agricultural land in those three states planted with alfalfa and other hay crops.

3 millionย Acres of irrigated agricultural land in Western states (including the Colorado River Basin) planted with alfalfa grown for forage (hay), grazing or seed in 2022.

18,000ย acresย Amount of land planted with alfalfa in in San Juan County, New Mexico, in 2022, all of which relies on water from Colorado River tributaries for irrigation.

76,070 acresย Amount of land planted with alfalfa in the San Luis Valley in Colorado in 2022. Fields here are irrigated with water from the Rio Grande, which dried out in Albuquerque this year.

85,795 acresย Amount of land planted with alfalfa in Imperial County, California, this year, consuming as much as 510,000 acre feet of Colorado River waterโ€”more than twice as much as the entire Las Vegas metro areaโ€™s yearly consumptive use. Imperial County has come to be known as the hottest county in the nation.

139ย Number of Imperial County farms on which more than 500 acres of alfalfa was grown in 2017.

88,252ย acresย Amount of land planted with alfalfa this year in Maricopa County, Arizona, home of Phoenix.

90,000 acresย Amount of photovoltaic solar panels needed to equal the generating capacity of Diablo Canyon nuclear power plant, according to aย 2021 MIT/Stanford study.

1.73 million metric tonsย Amount of hay shipped overseas via San Francisco and Los Angeles ports in 2021. This amounts to 50 million gallons of water, according to rough calculations based on 240 lbs of water/ton of hay.

$880 millionย Value of last yearโ€™s hay exports from Colorado River Basin states.

$450 millionย Value of that hay that went to China.ย 

$73 millionย Value shipped to Saudi Arabia.

75%ย Portion of Utahโ€™s Colorado River use consumed by agriculture in 2018.

446,000 acre-feetย Estimated amount of water that evaporates annually from major Upper Basin reservoirs, including aboutย 359,000 acre-feet from Lake Powell.

US changes names of places with racist term for Native women, including in #Colorado — The #Aurora Sentinel

As you begin to descend towards Echo Lake on the Mestaaโ€™ฤ—hehe Pass road, Mt Evans and its barely visible road come into focus. Photo credit: Colorado Bike Maps

Click the link to read the article on the Aurora Sentinel website (Mead Gruver). Here’s an excerpt:

The U.S. government has joined a ski resort and others that have quit using a racist term for a Native American woman by renaming hundreds of peaks, lakes, streams and other geographical features on federal lands in the West and elsewhere…

The changes announced Thursday capped an almost yearlong process that began after Haaland, the first Native American to lead a Cabinet agency, took office in 2021. [Deb] Haaland is from Laguna Pueblo in New Mexico.

The Native American Rights Fund, a nonprofit legal organization, welcomed the changes.

โ€œFederal lands should be welcoming spaces for all citizens,โ€ deputy director Matthew Campbell said in a statement. โ€œIt is well past time for derogatory names to be removed and tribes to be included in the conversation.โ€

Other places renamed include Coloradoโ€™s Mestaaโ€™ฤ—hehe (pronounced โ€œmess-taw-HAYโ€) Pass near Mestaaโ€™ฤ—hehe Mountain about 30 miles (48 kilometers) west of Denver. The new name honors an influential translator, Owl Woman, who mediated between Native Americans and white traders and soldiers in what is now southern Colorado.

At the Great Salt Lake, record salinity and low water imperils millions of birds — Science Magazine

Sunset from the western shore of Antelope Island State Park, Great Salt Lake, Utah, United States.. Sunset viewed from White Rock Bay, on the western shore of Antelope Island. Carrington Island is visible in the distance. By Ccmdav – Own work, Public Domain, https://commons.wikimedia.org/w/index.php?curid=2032320

Click the link to read the article on the Science Magazine website (Eli Kintisch). Here’s an excerpt:

Utahโ€™s Great Salt Lake is smaller and saltier than at any time in recorded history. In July, the U.S. Geological Survey (USGS) reported that the worldโ€™s third-largest saline lake had dropped to the lowest level ever documented. And last week researchers measured the highest salt concentrations ever seen in the lakeโ€™s southern arm, a key bird habitat. Salinity has climbed to 18%, exceeding a threshold at which essential microorganisms begin to die. The trends, driven by drought and water diversion [ed. and aridification influenced by Climate Change], have scientists warning that a critical feeding ground for millions of migrating birds is at risk of collapse.

โ€œWeโ€™re into uncharted waters,โ€ says biochemist Bonnie Baxter of Westminster College, who has been documenting the lakeโ€™s alarming changes. โ€œOne week the birds are gone from a spot we usually see them. The next week we see dead flies along the shore. And each week we have to walk further to reach the water.โ€

After years of inaction, the prospect of a dying lake, plus the risk of harmful dust blowing from the dry lakebed, is galvanizing policymakers to find ways of restoring water to the shrinking lake.

Satellite photo of the Great Salt Lake from August 2018 after years of drought, reaching near-record lows. The difference in colors between the northern and southern portions of the lake is the result of a railroad causeway. The image was acquired by the MSI sensor on the Sentinel-2B satellite. By Copernicus Sentinel-2, ESA – https://scihub.copernicus.eu/dhus/#/home, CC BY-SA 3.0 igo, https://commons.wikimedia.org/w/index.php?curid=77990895

The Great Salt Lake is really two lakes, divided in 1959 by a railroad causeway. Over time, the northern arm, which has few sources of fresh water, became saltier than the southern arm, which is fed by three rivers. Historically, salinity in the northern arm has hovered around 32%โ€”too salty to support more than microorganismsโ€”and about 14% in the southern arm. Although the southern part is about four times saltier than seawater, it supports a vibrant ecosystem characterized by billions of brine shrimp and brine flies, which feed on photosynthetic cyanobacteria and other microorganisms. Birds, in turn, devour prodigious numbers of flies and shrimp when they arrive at the lake to nest, molt, or rest during migrations. A diving waterbird called the eared grebe, for example,ย needsย 28,000 adult brine shrimp each day to survive.

Reading the #RioGrande — The #Albuquerque Journal

Embudo Student Hydrographers (1889?). Photo credit: USGS https://www.usgs.gov/media/images/embudo-student-hydrographers

An exchange on Twitter led me to this article written by friend of Coyote Gulch John Fleck. Click the link to read the article on the Albuquerque Journal website. Here’s an excerpt:

Thereโ€™s no evidence that John Wesley Powell, the second director of the U.S. Geological Survey, ever made it to this stretch of the Rio Grande back in the winter of 1888-89, when he dispatched a crew to the site to establish the nationโ€™s first river flow measurement site…

In the world of U.S. water management, this narrow strip where the river funnels between high bluffs is historic. Powell, most famous as the first person to survey the Grand Canyon, had realized that the ambitions of the continentโ€™s European immigrants spreading west across North America were running up against an arid reality that Easterners failed to understand. Collective effort would be needed to confront the regionโ€™s aridity…Powell realized, and one of the first things the young nation needed was to measure how much water there was in the rivers.

Powellโ€™s young agency, founded a decade before, dispatched a crew to Embudo in the winter of 1888-89 to try to figure out how to do that. The initial team that winter was led by Frederick Newell, who 13 years later became the founding director of the U.S. Reclamation Service, the predecessor to todayโ€™s U.S. Bureau of Reclamation, and the agency responsible for the dams and irrigation systems that changed the western U.S. forever.

The first experiment, done on the Rio Grande at Embudo, just north of Espaรฑola, was simple. They surveyed the channelโ€™s depth and width, then built a simple pontoon boat and floated downstream. A bit of simple arithmetic โ€“ the riverโ€™s cross section multiplied by the speed of the flowing water โ€“ gave their first measurement of the volume of water flowing past Embudo.

#Colorado’s devastating 2013 flood: A look back 9 years later — The #FortCollinsColoradoan #SouthPlatteRiver

Big Thompson Canyon before and after September 2013 flooding. Photo credit: Flywater.com

Click the link to read the article on the Fort Collins Coloradoan website (Mile Blumhardt). Click through and read the whole article with video and photos. Here’s an excerpt:

Deaths, damage caused by 2013 flood in Colorado

– At least nine people were killed

– The flood covered 4,500 square miles, or the size of more than 10 Rocky Mountain National Parks

– The damage estimateย reached nearly $4 billion

– More than 19,000 people were evacuated and 3,000 had to be rescued

– 26,000 homes were damaged or destroyed

– 200 businesses were destroyed and 750 were damaged

– 485 miles of road were damaged or destroyed statewide, including U.S. Highway 34 in the Big Thompson Canyon

– 50 major bridges were damaged

– There were 65 flash flood warnings

Storm pattern over Colorado September 2013 — Graphic/NWS via USA Today

“Theย surprise of the 2013 flood was that it happened that time of year,” state climatologist Russ Schumacher said in aย Coloradoan story on the eight-year anniversary of the flood.ย “Events like this that come to mind tend to come in late July and early August during monsoon storms or in May and Juneย with intenseย thunderstorms.”

Pump replacement for townโ€™s sanitation district remains a success, staff โ€˜cautiously optimisticโ€™ — The #PagosaSprings Sun

Click the link to read the article on the Pagosa Springs Sun website (Dorothy Elder). Here’s an excerpt:

At its Sept. 6 meeting, the Pagosa Springs Sanitation General Improvement District (PSSGID) Board of Directors heard an update about the districtโ€™s major pump replacement project that relayed that the pumps are, so far, a success. The project, which began during the last week of June, was meant to address a history of broken parts and inefficiencies within the system. At this point, the new pumps are achieving flows โ€œnear to what is desired,โ€ the agenda brief explains. However, the project has come with costs, with a total cost to date of $780,000, according to the brief. Town Manager Andrea Phillips explained that the project โ€œmay be slightly over budgetโ€ due to having to order some additional parts and retrofits.

However, the town will seek reimbursement from a $400,000 grant from the state, Phillips explained…

Some of these improvements include additional pretreatment that โ€œmay be needed in order to ensure that the longevity of the pumps continue,โ€ such as a grit removal system or moving to an automated bar screen, Phillips explained.

Wastewater Treatment Process

Court of Appeals denies the #Thornton #Water Project: City considers next steps — The #Northglenn #Thornton Sentinel #CacheLaPoudreRiver #SouthPlatteRiver

Click the link to read the article on the Northglenn Thornton Sentinel website (Luke Zarzecki). Here’s an excerpt:

City Spokesperson Todd Barnes said the city will decide between three ways to move forward: asking for a rehearing at the Court of Appeals, appealing to the Colorado Supreme Court or applying for a new permit.  The project will now cost the city an additional $126 million because of the delays and increase in labor and steel costs. 

โ€œWhile we are disappointed with the courtโ€™s ultimate decision, we appreciated that the court acknowledged Thorntonโ€™s lengthy and active efforts to work with Larimer County and its citizens as we went through the permit process,โ€ said Barnes…

The Larimer County Planning Commission voted to deny the permit on May 16, 2018. In response, Thornton worked to address the concerns raised by the Commission. Thornton then submitted a revised application, which included changing the preferred route: a corridor approach that was recommended by the Commission. With the new edits, the Commission recommended to the Board of Commissioners to approve the project.  However, the Board voted unanimously to deny the application on Feb. 11, 2019, saying the project did not meet seven of the 12 criteria.  Thornton took the decision to the District Court, claiming the board abused its discretion in denying Thorntonโ€™s application. While the Board said that seven of the criteria werenโ€™t met, the District Court ruled that there were only three instances with competent evidence to support the Boardโ€™s conclusion. Thornton appealed the decision at the Court of Appeals, who dealt a blow to Thornton, but recognized the Boardโ€™s abuse of power.

โ€œAlthough we agree with Thornton that the Board exceeded its regulatory powers in several respects, we ultimately affirm its decision to deny the permit application,โ€ they wrote in the opinion…

The Larimer Board of County Commissioners also recommended Thornton use the river, but Thornton said that running that water through the City of Fort Collins would degrade the water. The Court of Appeals said the method would also require modification of the water decree and ruled in favor of Thornton. As well, that court noted that making that request is outside of the Boardโ€™s power. Additionally, the Court of Appeals ruled the Board abused its discretion by suggesting Thorntonโ€™s potential use of eminent domain weakened its application because it was โ€œdisfavored by property owners.โ€ The Court said that canโ€™t be considered in the 1041 process.

โ€œIt is clear that the Board may not consider Thorntonโ€™s potential use of eminent domain during its 1041 review,โ€ the judges wrote. 

Thornton Water Project route map via ThorntonWaterProject.com

Wyoming officials call for better water #conservation practices amid #drought conditions — #Wyoming Public Media

Wyoming Drought Monitor map September 6, 2022.

Click the link to read the article on the Wyoming Public Media website (Will Walkey). Here’s an excerpt:

Officials in Jackson sent notices last month asking property owners to cut back on water use following a record-breaking July for the townโ€™s pumping system,ย according to the Jackson Hole News & Guide. Carlin Girard, Executive Director of the Teton Conservation District, said collective action can make a massive difference…In particular, Girard points to landscaping as an area that could be improved. He saidย simple changes, like planting native vegetation in your yard or cutting and watering your lawn less frequently, can save precious aquifer resources…A rainy summer has been helpful for reducing local drought conditions, but it doesnโ€™t replace a recent string of dry winters with relatively low snowpack, according to Girard…

Girard also said his advice could be extended to other parts of the Cowboy State.ย Rawlins usersย have been asked to cut back in recent months, in part due to infrastructure issues. And Southeast Wyoming is currently facing โ€œsevereโ€ drought, according to theย U.S. Drought Monitor.

Wyoming rivers map via Geology.com

#LakeMead forecast to drop 30 feet in 2 years — The Boulder City Review #ColoradoRiver #COriver #aridification

This page features images and footage shot with a GoPro camera during a pilot-only Lighthawk flight above Lake Mead and Hoover Dam, along the Colorado River near Las Vegas, Nevada July 29, 2020. Photo credit: The Water Desk

Click the link to read the article on the Boulder City Review website (Marvin Clemons). Here’s an excerpt:

Lake Mead is projected to drop about 30 feet over the next two years based on the โ€œmost probableโ€ outlook by the Bureau of Reclamation released Aug. 31. It is most likely that Lake Mead will be at 1,013.70 feet above sea level by July 2024, according to officials.

As of 10 a.m. Wednesday, the surface of the lake at Hoover Dam was at 1,044.12 feet, a rise of 3.41 feet since its summer low of 1,040.71 feet on July 27 โ€” partly because of unusually heavy monsoon rainfall runoff into the lake and partly because of lower demand from downstream users.

The full range of two-year projections for Lake Mead and Lake Powell visitย https://www.usbr.gov/lc/region/g4000/riverops/crmms-2year-projections.html.

To see the projections on all reservoirs in the Colorado River Basin, visitย https://www.usbr.gov/uc/water/hydrodata/crmms/current/8_2022/site_map.html.

#Beaver Ponds on Little Last Chance Creek Stayed Green During Wildfireย — Emily Fairfax

A beaver complex in California, about an hour and a half north of Lake Tahoe, stayed green and healthy even as the Dixie Fire and Sugar Fire burned the surrounding landscape in 2021. A year later, the beavers and broader ecosystem are still thriving (while nearby areas remain burnt). Smokey the Beaver protects another wetland ecosystem during drought and wildfire!

Beavers are having a good week. Click the link to read “Beavers Are Finally Getting the Rebrand They Deserve” on the Mother Jones website (Jackie Flynn Mogensen). Here’s an excerpt:

Itโ€™s been a good week for beavers. On Monday, the New York Times ran an article highlighting the rodentsโ€™ position as โ€œhighly skilled environmental engineersโ€ capable of mitigating threats like wildfires and drought. The same day, the San Francisco Chronicle dubbed beavers โ€œone of Californiaโ€™s best chances to fight climate change.โ€ And on Tuesday the Los Angeles Times reported that the Golden State is seeking applications for its brand-new beaver restoration unit to protect this โ€œuntapped, creative climate solving hero.โ€

And itโ€™s not just California; pro-beaver policy changes are happening across the US. Hereโ€™s the Times:

“Beavers, you might say, are having a moment. In Colorado, Idaho, Montana, Nevada, Oregon, Utah, and Wyoming, the Bureau of Land Management is working with partners to build beaver-like dams that they hope real beavers will claim and expandโ€ฆIn Maryland, groups are trying to lure beavers to help clean the water that flows into Chesapeake Bay. In Wisconsin, one study found that beavers could substantially reduce flooding in some of the most vulnerable areas of Milwaukee County.”

American beaver, he was happily sitting back and munching on something. and munching, and munching. By Steve from washington, dc, usa – American Beaver, CC BY-SA 2.0, https://commons.wikimedia.org/w/index.php?curid=3963858

Water crisis sinks to new level — Metropolitan State University of #Denver #ColoradoRiver #COriver #aridification

The Colorado River bridge on theย Utah State Route 95ย at Hite, Utah. Panorama stitched from 7 portrait format images. Photo credit: Christian Mehlfรผhrer via Wikimedia Commons

Click the link to read the article on the Metropolitan State University of Denver website (Mark Cox):

The Biden administration has given Western states a deadline to tackle the escalating emergency.

The Colorado Riverโ€™s literal race to the bottom hit another low last month.

As the waterline dropped farther and shortages hit dire new levels, the Biden administration announced unprecedented cuts, giving Colorado and six other Western states 60 days to reach an agreement on how to radically reduce their water use.

There is good reason for such urgency. Last month, the U.S. Bureau of Reclamation imposed the first-everย Tier 2 water restrictionsย โ€” a โ€œbreak glassโ€ emergency measure that was unthinkable even a few years ago.

The latest stark cuts mean that Arizona, Nevada and Mexico next year will see their shares of Colorado River water drop by 21%, 8% and 7%, respectively. And there are likely even more grueling restrictions ahead.

โ€œPeople need to understand how important the Colorado River is for all of us,โ€ said Elizabeth McVicker, Ph.D., J.D., a Management professor at Metropolitan State University of Denver who was instrumental in creating theย One World One Water Center (OWOW). โ€œIt provides drinking water for 40 million people across seven states, fuels many major cities and generates electricity for 5 million households. If it fails, we all fail.โ€

The Colorado River meanders through ranch land near Kremmling on Aug. 17, 2021. Choked by chronic overuse, a 22-year drought and the effects of climate change, the Colorado Riverโ€™s flow has declined by nearly 20% this century. Photo credit: Denver Water.

Standoff among states

The crux of the current problem? Neither Upper Basin states (Colorado, Wyoming, Utah and New Mexico) nor Lower Basin states (California, Nevada and Arizona) want to make further water cuts โ€” they each think the other side should make more sacrifices.

In essence, they are like seven people arguing over who gets the biggest bite of an ice-cream sandwich as it melts away before them.


RELATED:ย Water wars come to Colorado


However, McVicker sees glimmers of light. โ€œPersonally, Iโ€™m optimistic that the states will ultimately make progress because thereโ€™s a growing awareness that without serious action, weโ€™ll all lose,โ€ she said.

(Left to right) John McClow, Rebecca Mitchell, Gene Shawcroft, Tom Bucshatzke at the Colorado Water Congress 2022 Annual Summer Conference. Photo credit: Heather Sackett/Aspen Journalism

Unsurprisingly, she points out, state politicians are rattling their sabres and fighting their respective corners. โ€œBut we are seeing more meaningful collaboration between on-the-ground water agencies,โ€ she added, โ€œand thatโ€™s what counts.โ€

Climate consequences

Itโ€™s no mystery how we got here. The U.S. is caught up in a historicย 23-year megadrought. Our mountain snowpack is rapidly diminishing. Extreme heat is evaporating more water off the top of the great reservoirs. And unprecedented signs of depletion are seemingly everywhere.

Around the Lake Powell reservoir, a whiteย โ€œbathtub ringโ€ย outlines the recent steep water loss.


RELATED:ย Where did all the water go?


At Lake Mead, once-sunken boats have risen from the depths likeย ghoulish tombstones. Last month, receding waters in Texas revealed 113 million-year-oldย dinosaur tracks.

โ€œWe reached this point much more quickly than anyone thought,โ€ McVicker conceded. โ€œMost people thought it would be several more years before we reached Tier 2 status, but then it came along all at once.โ€

Students with answers

The urgency of the U.S. water shortage has long been recognized at MSU Denver, which runs a range of pioneering water-studies courses, including via theย OWOW Centerย and a noncredit option viaย Innovative and Lifelong Learning.ย And many MSU Denver students are rolling up their sleeves to tackle an issue that will likely be around for their entire adult lives.

MSU Denver Computer Science major Victor Lemus Gomez presented a policy to lawmakers that proposed water loss audits as a way to plan for the future. Photo by Alyson McClaran

This summer, Victor Lemus Gomez took part in a Colorado fellowship program designed to give policymaking experience to STEM students. He created a proposal urging water providers to conduct water-loss audits, which would help state leaders plan better for the future. And the best part? He got to deliver it personally.

โ€œIt was such a privilege to present my policy proposal directly to lawmakers,โ€ he said. โ€œIt gave me a firsthand look at the hard work and urgency that our state elected officials bring to this fight.โ€

Also in the fellowship program was fellow student Claire Sanford, who focused her efforts onย water-wise landscaping. โ€œItโ€™s so important for water conservation,โ€ she said. โ€œUsing native plants empowers people to tackle climate change while simultaneously lowering their water billsย andย encouraging biodiversity.โ€

Equally important, she said, it gives Coloradans a chance to connect with beautiful native landscapes that flourished in these same spaces centuries ago. โ€œItโ€™s always exciting to see people interacting with regionally appropriate plant life,โ€ she said, โ€œand it makes me feel hopeful for the future.โ€

Water waste

Tackling this imminent crisis will necessarily mean improving the efficiency of U.S. agriculture, which accounts for 80% of the Colorado Riverโ€™s water use. But thatโ€™s a tall order, given that there is so much waste, leakage and, sometimes, plain poor judgment.

โ€œRight now, our desert-based farmers are using billions of gallons of American water toย grow cropsย such as cotton and hay for export to competitor countries like Saudi Arabia and China,โ€ McVicker said. โ€œWhere is the sense in that?โ€ The whole agricultural industry, she argues, needs to take a strong look at itself.

MSU Denver Environmental Science major, Claire Stanford, observes native plants and water wise landscaping at Botanical Gardens in Denver. Photo by Alyson McClaran

For a better example of how to do things, McVicker points to Aurora, where a new city proposal seeks to eliminate โ€œnonfunctional turfโ€ in almost all new developments, including residential lawns, medians and commercial properties. โ€œThey are taking real, concrete action and standing up for the simple idea that we have to preserve to thrive,โ€ she said.

Persuading Coloradans to adopt a more responsible approach is also at the core of Sanfordโ€™s fellowship work. โ€œPeople are awestruck when I show them how our native plants have complex root systems up to 5 feet deep, as opposed to the shallow Kentucky bluegrass,โ€ she said. โ€œThese plants are literally rooted in our tradition, so we should be using them much more.โ€


RELATED:ย Lawn of the dead


One positive side effect of the ongoing crisis has been that the water industry is growing fast and increasingly becoming a realistic career choice for students. Smitten by the water bug himself, Gomez is encouraging others to explore potential opportunities in this fascinating field.

โ€œWater is one of those critical elements that encompasses every aspect of our lives,โ€ he said. โ€œAnd the great courses at MSU Denver offer a pathway into a field of study that isnโ€™t just fascinating and rewarding โ€” it can also bring about real social change.โ€

Navajo Dam operations update (September 10, 2022): Bumping releases to 900 cfs #SanJuanRiver #ColoradoRiver #COriver #aridification

The San Juan Riverโ€™s Navajo Dam and reservoir. Photo credit: U.S. Bureau of Reclamation

From email from Reclamtion (Susan Novak Behery):

In response to a hot dry weather pattern and continued decreasing flows in the critical habitat reach, the Bureau of Reclamation has scheduled an increase in the release from Navajo Dam from 850 cubic feet per second (cfs) to 900 cfs for tomorrow, September 10th, at 4:00 AM. 

Releases are made for the authorized purposes of the Navajo Unit, and to attempt to maintain a target base flow through the endangered fish critical habitat reach of the San Juan River (Farmington to Lake Powell).  The San Juan River Basin Recovery Implementation Program recommends a target base flow of between 500 cfs and 1,000 cfs through the critical habitat area.  The target base flow is calculated as the weekly average of gaged flows throughout the critical habitat area from Farmington to Lake Powell.  This scheduled release change is calculated to be the minimum required to meet the minimum target baseflow.

World on brink of five โ€˜disastrousโ€™ #climate tipping points, study finds — The Guardian #ActOnClimate #KeepItInTheGround

The collapse of the Greenland ice cap is one of the tipping points that may already have been passed. By Hannes Grobe 20:10, 16 December 2007 (UTC) – Own work, CC BY-SA 2.5, https://commons.wikimedia.org/w/index.php?curid=3237742

Click the link to read the article on The Guardian website (Damian Carrington). Here’s an excerpt:

The climate crisis has driven the world to the brink of multiple โ€œdisastrousโ€ tipping points, according to a major study. It showsย five dangerous tipping pointsย may already have been passed due to the 1.1C of global heating caused by humanity to date. These include theย collapse of Greenlandโ€™s ice cap, eventually producing a huge sea level rise, theย collapse of a key currentย in the north Atlantic, disrupting rain upon which billions of people depend for food, and an abruptย melting of carbon-rich permafrost. At 1.5C of heating, the minimum rise now expected, four of the five tipping points move from being possible to likely, the analysis said. Also at 1.5C, an additional five tipping points become possible, includingย changes to vast northern forestsย and the loss ofย almost all mountain glaciers.

In total, the researchers found evidence for 16 tipping points, with the final six requiring global heating of at least 2C to be triggered, according to the scientistsโ€™ estimations. The tipping points would take effect on timescales varying from a few years to centuries.

โ€œThe Earth may have left a โ€˜safeโ€™ climate state beyond 1C global warming,โ€ the researchers concluded, with the whole of human civilisation having developed in temperatures below this level. Passing one tipping point is oftenย likely to help trigger others, producing cascades. But this is still being studied and was not included, meaning the analysis may present the minimum danger.

Prof Johan Rockstrรถm, the director of the Potsdam Institute for Climate Impact Research, who was part of the study team, said: โ€œThe world is heading towards 2-3C of global warming.

Coming soon, the apocalypse, maybe — Writers on the Range #ActOnClimate #KeepItInTheGround

Subsequent rains following the Hayman Fire in 2002 led to erosion problems and silt buildup in the creeks surrounding the reservoir. Photo credit: Denver Water

Click the link to read the article on the Writers on The Range website (Pepper Trail):

Just about every video game, young adult novel and buzz-worthy streaming series agree that we need to prepare for a post-apocalyptic world. Up ahead, around a sharp curve or off a cliff, it is waitingโ€”The Apocalypse.

Maybe not โ€œthe complete final destruction of the world,โ€ but certainly โ€œan event involving destruction or damage on an awesome or catastrophic scale,โ€ to quote the two definitions in the Oxford Online Dictionary. Not yet, but soon.

This has me wondering: How will we know when we move from pre- to post-apocalypse? This summer, my hometown in southern Oregon was crushed under a heat dome, sweltering in triple-digit temperatures. A fire across the state line ignited and within 24 hours exploded to become Californiaโ€™s largest wildfire this year so far.

The two mountain lakes that provide water to our valley orchards and vineyards are at 2% and 6% full, that is, 98% and 94% empty. Last year, an even more severe heat dome pushed temperatures in normally cool Seattle and Portland to record-shattering levels, wildfires burned more than a million acres in Oregon and 2000-year-old giant sequoias perished in fires of unprecedented severity in Californiaโ€™s Sierra Nevada.

Catastrophic extremes are becoming normal. The Great Salt Lake is at the lowest level ever recorded, spawning toxic dust storms. A mega-drought has shriveled the Colorado River, with the beginning of major cutbacks in water deliveries to Arizona and Nevada. Elsewhere in the West, flooding devastated Yellowstone National Park in June, collapsing roads and leading to the evacuation of over 10,000 visitors.

Widening our view, Dallas is currently inundated with what is described as a โ€œ1,000-yearโ€ flooding event, following similar flooding disasters in Las Vegas, St. Louis and Kentucky earlier this summer. Across the Atlantic, Europe was scorched by the highest temperatures ever recorded this summer, triggering massive wildfires, the collapse of a glacier in Italy and over 10,000 heat-related deaths. India, China, and Japan experienced record heat waves this year.

I could go on, but no doubt you have read the news, too, about climate-caused apocalyptic events. Closely related is the global extinction crisis, with over a million species at risk by the end of this century. Bird populations in the United States have collapsed by one-third in the past 50 years, and the worldโ€™s most diverse ecosystems, including tropical rainforests and coral reefs, could largely disappear in coming decades.

Letโ€™s also not forget the COVID-19 pandemic, which has killed at least 6.46 million people worldwide and sickened 597 million. That pandemic shows no sign of ending as the virus continues to evolve new variants. Meanwhile, the new global health emergency of monkeypox has been declared. And polio, once eliminated in this country, is back, thanks to people who arenโ€™t vaccinated.

What about Americaโ€™s social fabric? According to a poll taken this summer by theย New York Times, a majority of Americans surveyed now believe that our political system is too divided to solve the nationโ€™s problems. The non-profit Gun Violence Archive has documented 429 mass shootings so far this year in America, with โ€œmass shootingsโ€ defined as at least four people killed or injured.

Meanwhile, the Supreme Courtโ€™s overturning of Roe v. Wade has led to a rapid and stark division of the country into states that permit abortions versus those that outlaw it. Republicans and Democrats increasingly live in separate media universes, with both sides concerned about the possibility of a civil war.

I admit this is a staggering list of โ€œdamage on an awesome or catastrophic scale,โ€ but Iโ€™m not ready to declare myself a citizen of the post-apocalypse. We donโ€™t have to live there. Instead, letโ€™s accept that humanity and the whole planet are โ€œapocalypse-adjacent.โ€ The apocalypse is before us and we can see it clearly. But the world is not yet ruined.

Human beings do have this redeeming and also infuriating trait: We are at our most creative and cooperative when it isย almostย too late. We can โ€” we must โ€” pull each other back from the brink. To fail is to condemn our children to live in the hellscape of a dystopian video game. As they will tell you, that is no place to be.

Pepper Trail is a contributor to Writers on the Range,ย writersontherange.org, an independent nonprofit dedicated to spurring lively conversation about the West. He is a naturalist and writer in Ashland, Oregon.

Study previews how climate change may alter rain-making atmospheric rivers by 2100 — NOAA

Atmospheric river. Photo credit: NOAA

Click the link to read the article on the NOAA Website (Theo Stein):

The people, economy, and ecosystems of the Pacific coast states of California, Oregon and Washington are highly dependent on cool-season atmospheric rivers for their annual water supply. These long, narrow flows of saturated air can transport enormous amounts of water vapor – roughly equivalent to the flow at the mouth of the Mississippi River. They can unloadย  heavy precipitation on the Cascade and Sierra Nevada ranges, but their annual yield regularly swings between boom and bust.ย 

Whenย atmospheric rivers, or ARs, fail to materialize, droughts often follow – especially in California, where they account for over 50% of the total annual precipitation. Anticipating future climate-induced changes to AR patterns is therefore exceedingly important. Global models, however, do a poor job of simulating precipitation over the complex terrain of coastal and inland mountain ranges. Now, a new NOAA study using data generated by regional climate models and published in the journalย Climate Dynamicsย suggests climate change will likely alter atmospheric rivers in ways that will make managing water more difficult.ย ย 

โ€œThese high-resolution climate simulations showed something we hadn’t seen before, which was decreased future precipitation amounts across many mountainous regions of the western United States,โ€ said lead author Mimi Hughes, a research scientist in NOAAโ€™s Physical Sciences Laboratory.ย 

Atmospheric rivers can be both beneficial — when they provide water to fill reservoirs and build snowpack — and calamitous — when they generate so much precipitation over a short period of time that they cause flooding. Although numerous studies have investigated climate projections for atmospheric rivers, few have examined whether climate change would have a uniform impact on all events.ย 

Downscaling climate models to better predict future impacts

For the new paper, Hughes and a team ofย Physical Science Labย and colleagues fromย CIRESย andย NCARย analyzedย data from regional climate modelsย simulating weather conditions over most of North America for the period 1950โ€“2100. They specifically looked at the end-of-21st-century changes in integrated water vapor transport (IVT) events along the western US coast in three of the highest-resolution regional climate models. IVT is a measure of how much water vapor is moving through the air and was used as an indicator of atmospheric rivers making landfall.ย 

Rather than evaluate the simulated impact on all model-generated atmospheric rivers, researchers partitioned the events into two categories – modest and extreme – and then looked for different outcomes.ย 

Hughes said their findings are consistent withย previous global climate model projections of increased lower-elevation precipitation across much of the western U.S. However, differences did emerge. The simulations projected moderate events to be less frequent and deliver less high-elevation precipitation, a finding that tracksย another recent NOAA study.

A drier future for California’s most important “reservoir”?

The Sierra Nevada mountains are an irreplaceable component of California’s current water system. Snowpack in the high Sierras acts like a giant reservoir, releasing clean water during the melt season.ย Sixty percent of Californiaโ€™s water supplyย originates in the high Sierras.ย More than 75% percent of Californiansย drink water generated by Sierra snows.

Notably, more than half of the model runs in the new study showed that Sierra snowpack would receive decreased precipitation by 2100, while the arid Great Basin might benefit from a moisture boost.ย 

This study suggests these two types of atmospheric rivers could change in different ways under climate change, with the beneficial kind becoming less frequent, Hughes said.ย 

โ€œWhile we did not specifically examine seasonal precipitation outcomes like droughts, itโ€™s fair to conclude that if these projections bear out, Californiaโ€™s strained water resources may become even more challenging to manage,โ€ she said.ย ย 

For more information, contact Theo Stein, NOAA Communications, atย theo.stein@noaa.gov.ย 

More wolves, beavers needed as part of improving western United States habitats, scientists say — #Oregon State University

Beaver. Photo credit: Oregon State University

Click the link to read the article on the Oregon State University website (Steve Lundeberg):

Oregon State University scientists are proposing management changes on western federal lands that they say would result in more wolves and beavers and would re-establish ecological processes.

In a paper published today [September 9, 2022] inย BioScience, โ€œRewilding the American West,โ€ co-lead author William Ripple and 19 other authors suggest using portions of federal lands in 11 states to establish a network based on potential habitat for the gray wolf โ€“ an apex predator able to trigger powerful, widespread ecological effects.

In those states the authors identified areas, each at least 5,000 square kilometers, of contiguous, federally managed lands containing prime wolf habitat. The states in the proposed Western Rewilding Network, which would cover nearly 500,000 square kilometers, are Oregon, Washington, California, Nevada, Idaho, Montana, Wyoming, Colorado, Arizona, New Mexico and Utah.

โ€œItโ€™s an ambitious idea, but the American West is going through an unprecedented period of converging crises including extended drought and water scarcity, extreme heat waves, massive fires and loss of biodiversity,โ€ said Ripple, distinguished professor of ecology in the OSU College of Forestry.

Gray wolf. Photo credit: Oregon State University

Gray wolves were hunted to near extinction in the West but were reintroduced to parts of the northern Rocky Mountains and the Southwest starting in the 1990s through measures made possible by the Endangered Species Act.

โ€œStill, the gray wolfโ€™s current range in those 11 states is only about 14% of its historical range,โ€ said co-lead author Christopher Wolf, a postdoctoral scholar in the College of Forestry. โ€œThey probably once numbered in the tens of thousands, but today there might only be 3,500 wolves across the entire West.โ€

American beaver, he was happily sitting back and munching on something. and munching, and munching. By Steve from washington, dc, usa – American Beaver, CC BY-SA 2.0, https://commons.wikimedia.org/w/index.php?curid=3963858

Beaver populations, once robust across the West, declined roughly 90% after settler colonialism and are now nonexistent in many streams, meaning ecosystem services are going unprovided, the authors say.

By felling trees and shrubs and constructing dams, beavers enrich fish habitat, increase water and sediment retention, maintain water flows during drought, improve water quality, increase carbon sequestration and generally improve habitat for riparian plant and animal species.

โ€œBeaver restoration is a cost-effective way to repair degraded riparian areas,โ€ said co-author Robert Beschta, professor emeritus in the OSU College of Forestry. โ€œRiparian areas occupy less than 2% of the land in the West but provide habitat for up to 70% of wildlife species.โ€

Similarly, wolf restoration offers significant ecological benefits by helping to naturally control native ungulates such as elk, according to the authors. They say wolves facilitate regrowth of vegetation species such as aspen, which supports diverse plant and animal communities and is declining in the West.

The paper includes a catalogue of 92 threatened and endangered plant and animal species that have at least 10% of their ranges within the proposed Western Rewilding Network; for each species, threats from human activity were analyzed.

The authors determined the most common threat was livestock grazing, which they say can cause stream and wetland degradation, affect fire regimes and make it harder for woody species, especially willow, to regenerate.

Nationally, about 2% of meat production results from federal grazing permits, the paper notes.

โ€œWe suggest the removal of grazing on federal allotments from approximately 285,000 square kilometers within the rewilding network, representing 29% of the total 985,000 square kilometers of federal lands in the 11 western states that are annually grazed,โ€ Beschta said. โ€œThat means we need an economically and socially just federal compensation program for those who give up their grazing permits. Rewilding will be most effective when participation concerns for all stakeholders are considered, including Indigenous people and their governments.โ€

In addition to Beschta, Wolf and Ripple, authors from Oregon State include J. Boone Kauffman, Beverly Law and Michael Paul Nelson. Daniel Ashe, former director of the U.S. Fish and Wildlife Service and now the president of the Association of Zoos and Aquariums, is also a co-author.

The paper also included authors from the University of Washington, the University of Colorado, the Ohio State University, Virginia Tech, Michigan Technological University, the University of Victoria, the Turner Endangered Species Fund, the National Parks and Conservation Association, RESOLVE, the Florida Institute for Conservation Science, Public Lands Media and Wild Heritage.

#GunnisonRiver #water agencies win $340,000 in federal #drought grants, launch contingency planning — @WaterEdCO #ColoradoRiver #COriver #aridification

he Gunnison Dam. Credit: Creative Commons

Click the link to read the article on the Water Education Colorado website (Jerd Smith):

Two Gunnison River water districts in the headwaters of the Colorado River system are embarking on a $700,000 drought planning effort, aided by hundreds of thousands of dollars in new funding from the U.S. Bureau of Reclamation.

The Montrose-based Uncompahgre Valley Water Users Association, one of the largest suppliers of agricultural water in the Upper Colorado River Basin, will spend $400,000 to develop an action plan for dealing with the ongoing and future droughts, with $200,000 in federal funds, and matching funds from local sources.

The Gunnison-based Upper Gunnison River Water Conservancy District will spend $300,000 for a similar program, with $140,000 in federal funds, and another $166,000 from local partners, according to its application. The Upper Gunnison district is responsible for delivering agriculture water, but also serves the city of Gunnison and the town of Crested Butte as well as the ski area.

Reclamation granted this funding through its WaterSMART program. On Aug. 2 the agency awarded more than $865,000 in drought planning funds to water districts and agencies in five states, including California, Arizona, New Mexico and Oregon, as well as Colorado.

The seven-state Colorado River Basin is facing severe water shortages and is operating under a basin-wide set of state-level drought contingency plans. Those plans include water cutbacks for users in Arizona and Nevada, and possibly California in the Lower Basin, as well as emergency releases of water from reservoirs in the Upper Basin, including Flaming Gorge and Blue Mesa. The Upper Basin includes Colorado, New Mexico, Utah and Wyoming.

Compared to the multi-million dollar state and federal efforts, the local WaterSmart grants are fairly small, but officials say they provide critical help in important areas and create opportunities to win matching funds from other agencies.

โ€œThis really helps because there is so much that has to be done,โ€ said Sonia Chavez, general manager of the Upper Gunnison district. โ€œAnd anything we can get will help us leverage funding to get more done. A couple of hundred thousand dollars really helps.โ€

Steve Pope, manager of the Uncompahgre association, said the money will go toward developing contingency plans and designing improvements to the associationโ€™s aging federal infrastructure on which it relies.

โ€œOur infrastructure is extremely old,โ€ Pope said. โ€œEven though this grant is for planning purposes it will have a big impact on our system in the sense that it will allow us to best manage our water without having to make big infrastructure changes.โ€

Pope is responsible for delivering 500,000 to 700,000 acre-feet of water, through more than 700 miles of canals, laterals and drains, to farmers and some small towns in the Gunnison Valley.

Both districts occupy key territory in the Upper Colorado River Basin, with the Gunnison district lying just above Blue Mesa Reservoir, and the Uncompahgre district lying below.

Blue Mesa Reservoir, Coloradoโ€™s largest water storage reservoir operated by the U.S. Bureau of Reclamation, has been hard hit by drought and by emergency releases of water to help stabilize Lake Powell.

Chavez said her small, largely rural district has never implemented a drought plan, in part because one has never been needed until now.

The new grant funds will allow it to better monitor and analyze its water supplies, develop ways to conserve water, and determine equitable ways for farmers and cities to use whatever water is available.

โ€œIf we get into a drought, how is my little community here going to get through that drought?โ€ Chavez said, โ€œand how could we better share the water we do have available?โ€

Jerd Smith is editor of Fresh Water News. She can be reached at 720-398-6474, via email at jerd@wateredco.org or @jerd_smith.

Map of the Gunnison River drainage basin in Colorado, USA. Made using public domain USGS data. By Shannon1 – Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=69257550

September 2022 La Niรฑa update: itโ€™s Q & A time — NOAA

Click the link to read the article on the NOAA website (Emily Becker):

Ocean and atmospheric conditions tell us that La Niรฑaโ€”the cool phase of the El Niรฑo-Southern Oscillation (ENSO) climate patternโ€”currently reigns in the tropical Pacific. Itโ€™s looking very likely that the long-predicted third consecutive La Niรฑa winter will happen, with a 91% chance of La Niรฑa through Septemberโ€“November and an 80% chance through the early winter (Novemberโ€“January).

91%! Thatโ€™s very high. Why so confident?

The first reason is that La Niรฑa is already clearly in force in the tropical Pacific. The August sea surface temperature in the Niรฑo-3.4 region, our primary location for ENSO monitoring, was aboutย 1.0 ยฐCย (1.8 ยฐF) cooler than the long-term average, according toย ERSSTv5, our favorite dataset for sea surface temperature. (โ€œLong-termโ€ isย currentlyย 1991โ€“2020.) This is substantially cooler than theย La Niรฑa thresholdย of 0.5 ยฐC (0.9 ยฐF) below average.

Sea surface temperatures in the tropical Pacific Ocean from mid-June through early September 2022 compared to the long-term average. East of the International Dateline (180หš), waters remained cooler than average, a sign of La Niรฑa. Graphic by Climate.gov, based on data fromย NOAAโ€™s Environmental Visualization Lab. Description of historical baseline periodย here.

La Niรฑaโ€™sย characteristic tropical atmospheric responseโ€”more rain and clouds over Indonesia, less over the central Pacific, and stronger-than-average winds both aloft and near the surfaceโ€”was also clearly active in August. Taken together, the oceanic and atmospheric conditions tell us that La Niรฑa is solidly in place. Once active, La Niรฑa conditions are reinforced by feedback processes between the ocean and atmosphere. Read more about those feedbacksย here.

La Niรฑa feedbacks between the ocean and atmosphere.ย ย Climate.gov schematic by Emily Eng and inspired byย NOAA PMEL.

What else is providing confidence in the forecast?

There is a substantial amount of cooler-than-average water under the surface of the eastern-central tropical Pacific. This subsurface water will provide a source of cooler water to the surface over the next couple of months. Also, the computer climate model consensus predicts that La Niรฑa will continue into the winter.

How long will La Niรฑa last?

While thereโ€™s high agreement through the winter, there is a lot of uncertainty about how long this La Niรฑa will last and when we will see a transition to neutral conditions. Current forecaster consensus gives La Niรฑa the edge through Januaryโ€“March (54%), with a 56% chance of neutral for the Februaryโ€“April period.

NOAA Climate Prediction Center forecast for each of the three possible ENSO categories for the next 8 overlapping 3-month seasons. Blue bars show the chances of La Niรฑa, gray bars the chances for neutral, and red bars the chances for El Niรฑo. Graph by Michelle L’Heureux.

When have previous La Niรฑas transitioned to neutral?

There are 24 La Niรฑa winters in ourย historical record, which dates back to 1950. Of those, only one (2016โ€“17) changed to neutral in Decemberโ€“February. Four transitioned to neutral in Januaryโ€“March, one (2000โ€“01) by Februaryโ€“April, two by Marchโ€“May, and 16 in Aprilโ€“June or later. Especially when youโ€™re slicing and dicing a relatively short record, itโ€™s tough to find truly analogous events. For example, this will be only the third La Niรฑa three-peat on record, and the first not to follow a strong El Niรฑo event.

Three-year history of sea surface temperatures in the Niรฑo-3.4 region of the tropical Pacific for the 8 existing double-dip La Niรฑa events (gray lines) and the current event (purple line). Of all the previous 7 events, 2 went on to La Niรฑa in their third year (below the blue dashed line), 2 went on to be at or near El Niรฑo levels (above the red dashed line) and three were neutral. Graph is based on monthly Niรฑo-3.4 index dataย from CPCย usingย ERSSTv5. Created by Michelle Lโ€™Heureux.

All this is to say that past La Niรฑas arenโ€™t providing much guidance on how long we can expect this event to last. The current forecaster estimate, which favors an earlier than typical transition to neutral, is based on computer model guidance.

Remind me why I should care about La Niรฑaโ€ฆ?

I admit, as scientists, we sometimes get wrapped up in how interesting the inner workings of El Niรฑo and La Niรฑa are! But ENSO has some serious practical applications. In a nutshell, La Niรฑa and El Niรฑo affect global atmospheric circulation patterns in (somewhat) predictable patterns, altering jet streams and storm tracks around the world and influencing temperature, rain/snow, and tropical cyclone seasons. Since we can predict ENSO months in advance, we can get an early picture of potential upcoming climate patterns. Of course, nothing is guaranteed with weather and climateโ€”ENSO merely โ€œtilts the oddsโ€ toward certain patterns. For more on how ENSO affects climate patterns, as well as why it’s so difficult to make specific predictions, check out Michelleโ€™s post here.

Can I have some examples of how La Niรฑa can affect North American weather?

Yes! Hereโ€™s a map, followed by a list of some specifics.

During La Niรฑa, the Pacific jet stream often meanders high into the North Pacific. Southern and interiorย Alaskaย and the Pacific Northwest tend to be cooler and wetter than average, and the southern tier of U.S. statesโ€”from California to the Carolinasโ€”tends to be warmer and drier than average. Farther north, the Ohio and Upper Mississippi Riverย Valleysย may be wetter than usual. Climate.gov image.

What about global impacts?

Temperature and precipitation patterns that are typical of La Niรฑa during (top) Northern Hemisphere winters and (bottom) summers. Map by NOAA Climate.gov, based on originals from the Climate Prediction Center. Larger images and maps for El Niรฑo are availableย in this post.

Thatโ€™s enough for now! Thanks!

Anytime! See you next month.

The summer droughtโ€™s hefty toll on American crops — The Washington Post

Drought impacted corn. Water stress can lead to insufficient water supply for cities, agriculture, and vegetation. Dry vegetation may facilitate the propagation and increase the risk of wildfires.

Click the link to read the article on The Washington Post website (Laura Reiley). Here’s an excerpt:

Corn, wheat and other agricultural products withered in a year of glaring climate change impacts

Farmers, agricultural economists and others taking stock of this summerโ€™s growing season say drought conditions and extreme weather have wreaked havoc on many row crops, fruits and vegetables, with the American Farm Bureau Federation suggesting yields could be down by as much as a third compared with last year. American corn is on track to produce its lowest yield since the drought of 2012, according to analysts at Rabobank,ย which collects data about commodity markets. This yearโ€™s hard red winter wheat crop was the smallest since 1963, the bankโ€™s analysts said. In Texas, cotton farmers have walked away from nearly 70 percent of their crop because the harvest is so paltry, according to the U.S. Department of Agriculture. The California rice harvest is half what it would be in a normal year, an industry group said.

The poor yields are probably more than a one-year blip, as climate change alters weather patterns in agriculturally important parts of the country, contributing to higher food prices that experts donโ€™t see ebbing any time soon. Drought has consumed 40 percent of the country for the past 101 weeks, USDA meteorologistBrad Rippey said. But precisely where that 40 percent is has shifted over time, meaning different swaths of the countryโ€™s agricultural land have been affected at different times, spreading pain and difficult choices geographically and by crop.

US Drought Monitor map September 6, 2022.

โ€œThe biggest impacts this year have been the Central and Southern Great Plains โ€” Nebraska southward through Texas โ€” and the two big crops hit this year are grain sorghum [primarily used for animal feed] and cotton,โ€ Rippey said…

In California, farmers are making tough choices to give up on their strawberries and tomatoes, lettuces and melons, so that whatever water they get goes to crops such as almonds, grapes and olives, into which theyโ€™ve sunk multiyear investments and which provide a better payoff, Rippey said…

The USDA had reduced its corn forecast last month because of this summerโ€™s drought. But thePro Farmer Crop Tour, which concluded Aug. 25, found the corn yield was even worse than that lowered expectation. The on-the-ground inspectors also found the corn quality had suffered as a result of heat and dry conditions, with cobs carrying small grains and many suffering from โ€œtipback,โ€ when kernels are missing from the outer edge…Wheat has taken a walloping this year, with rains impeding spring planting after a protracted La Niรฑa weather pattern meant several years of hotter and drier weather over key production areas. Drought is also having a dramatic effect on California rice, which isgrown mostly in the Sacramento Valley. The state, which grows medium-grain rice such as sushi rice, is at about half of a normal yearโ€™s production, said Katie Cahill, spokeswoman for the California Rice Commission. Many growers decided to fallow their fields and sell their water to perennialcrops such as almonds to defray their losses…The USDA recently estimated that the tomatoharvest this year will be 10.5 million tons, more than a million tons shy of a normal season, which will be reflected in the next yearโ€™s pizza, spaghetti sauce and ketchup prices. Harvest of the new potato crop is underway, and Rabobank analysts say the harvested area is projected to drop 4 percent from last year (and last yearโ€™s crop was the lowest in a decade). Its analysts also said year-to-date shipments of carrots are down 45 percent, sweet corn down 20 percent, sweet potatoes down 13 percent, and celery down 11 percent, all an indication of short supply. And according to the USDA, total peach production was down 15 percent from 2021, mostly because of Californiaโ€™s small crop…

But the bad news extends to cattle, portending bad news for next yearโ€™s beef prices. When weather is dry and hot, thereโ€™s not enough natural feed to go around. To sustain a herd, ranchers must bring in hay, and feed prices soar, prompting ranchers to sell their animals a little early, and often to sell heifers, the young females, rather than keep them as breeding stock, said Sarah Little, spokeswoman for the North American Meat Institute, a trade association. This has resulted in lower beef prices for consumers in the short term but signals that there probably will be a tighter supply next year.

Interior Department Completes Removal of โ€œSq___โ€ from Federal Use: Decisions of the U.S. Board on Geographic Names are Effective Immediately

Secretary Haaland meets with tribal, local leaders regarding conservation efforts in southern Nevada

Click the link to read the release on the Deparmtment of Interior website :

The Department of the Interior today [September 8, 2022] announced the Board on Geographic Names (BGN) has voted on the final replacement names for nearly 650 geographic features featuring the word sq___. The final vote completes the last step in theย historic effortsย to remove a term from federal use that has historically been used as an offensive ethnic, racial and sexist slur, particularly for Indigenous women.

โ€œI feel a deep obligation to use my platform to ensure that our public lands and waters are accessible and welcoming. That starts with removing racist and derogatory names that have graced federal locations for far too long,โ€ saidย Secretary Deb Haaland. โ€œI am grateful to the members of the Derogatory Geographic Names Task Force and the Board on Geographic Names for their efforts to prioritize this important work. Together, we are showing why representation matters and charting a path for an inclusive America.โ€

Theย list of new namesย can be found on the U.S. Geological Survey website with aย map of locations.

The final vote reflects a months-long effort by the Derogatory Geographic Names Task Force established byย Secretaryโ€™s Order 3404, which included representatives from the Departmentโ€™s Bureau of Indian Affairs, Bureau of Land Management, Bureau of Safety and Environmental Enforcement, National Park Service, Office of Diversity, Inclusion and Civil Rights, Office of Surface Mining Reclamation and Enforcement, and the U.S. Geological Survey and the Department of Agricultureโ€™s U.S. Forest Service.

During the public comment period, the Task Force received more than 1,000 recommendations for name changes. Nearly 70 Tribal governments participated in nation-to-nation consultation, which yielded another several hundred recommendations. While the new names are immediately effective for federal use, the public may continue to propose name changes for any featuresย โ€” including those announced todayย โ€” through the regularย BGN process.

The renaming effort included several complexities: evaluation of multiple public or Tribal recommendations for the same feature; features that cross Tribal, federal and state jurisdictions; inconsistent spelling of certain Native language names; and reconciling diverse opinions from various proponents. In all cases, the Task Force carefully evaluated every comment and proposal.

In July, the Department announced an additional review by the BGN for seven locations that are considered unincorporated populated places. Noting that there are unique concerns with renaming these sites, the BGN will seek out additional review from the local communities and stakeholders before making a final determination.

Secretary’s Order 3404 and the Task Force considered only the sq___ derogatory term in its scope.ย Secretaryโ€™s Order 3405ย created a Federal Advisory Committee for the Department to formally receive advice from the public regarding additional derogatory terms, derogatory terms on federal land units, and the process for derogatory name reconciliation. Next steps on the status of that Committee will be announced in the coming weeks.

Aspinall Unit operations update September 8, 2022: Bumping up to 1400 cfs #GunnisonRiver #ColoradoRiver #COriver #aridification

Black Canyon July 2020. Photo credit: Cari Bischoff

From email from Reclamation (Erik Knight):

Releases from the Aspinall Unit will be increased from 1350 cfs to 1400 cfs on Thursday, September 8th. Releases are being increased due to the hot and dry conditions that have caused the river to drop below the baseflow target on the lower Gunnison River. The actual April-July runoff volume for Blue Mesa Reservoir came in at 68% of average.ย 

Flows in the lower Gunnison River are currently under the baseflow target of 890 cfs. River flows are expected to be under the baseflow target until the additional release from Crystal Dam arrives.ย 

Pursuant to the Aspinall Unit Operations Record of Decision (ROD), the baseflow target in the lower Gunnison River, as measured at the Whitewater gage, is 890 cfs for September.ย 

Currently, Gunnison Tunnel diversions are 1050 cfs and flows in the Gunnison River through the Black Canyon are around 345 cfs. After this release change Gunnison Tunnel diversions will still be around 1050 cfs and flows in the Gunnison River through the Black Canyon will be near 400 cfs.ย ย Current flow information is obtained from provisional data that may undergo revision subsequent to review.

#Drought news (September 8, 2022): Most of the [West] region saw no precipitation this week, except for some isolated storm activity in W. #WA, #AZ, E. #Colorado, and E. #NM

Click a thumbnail graphic to view a gallery of drought data from the US Drought Monitor website.

Click the link to go to the US Drought Monitor website. Here’s an excerpt:

This week’s drought summary

This U.S. Drought Monitor (USDM) week saw continued improvements on the map across areas of the South, including Texas, in response to another round of localized heavy rainfall during the past week. Overall, the recent rainfall in Texas throughout the past month has started to make a significant dent in the stateโ€™s drought conditions in some areas. In contrast, drought conditions intensified in areas of the central and northern Plains with additional degradations on this weekโ€™s map. In these areas, recent drought impact reports submitted to the National Drought Mitigation Center indicated drought-related impacts within the agricultural sector including reduced crop yields as well as deteriorating pasture and rangeland conditions. Out West, the big story of the past week has been the heat wave that has impacted the region with record-setting temperatures and critical fire-weather conditions. The hot temperatures and strong winds exacerbated conditions on the Mill Fire, which broke out in Northern California on Friday, forcing the evacuation of the town of Weed, California as well as neighboring communities. In Death Valley, California, high temperatures exceeded 125 deg F multiple times during the past week including on September 1st when the high temperature reached 127 deg Fโ€•potentially breaking the record for the hottest temperature ever recorded during September, according to preliminary reports. Elsewhere, shower activity in the Northeast led to isolated improvements in drought-affected areas of Massachusetts and Connecticut, while further to the south conditions deteriorated on the map in Delaware. In the Midwest, short-term precipitation deficits and declining soil moisture levels led to the expansion of areas of drought in northern Missouri and central Illinois…

High Plains

On this weekโ€™s map, drought-related conditions continued to intensify across areas of southeastern Wyoming, northeastern Montana, Nebraska, southern South Dakota, and western Kansas, as anomalously hot temperatures impacted western portions of the region. According to the National Drought Mitigation Centerโ€™s Condition Monitoring Observer Reports (CMOR), numerous drought impact reports have been submitted during the past 30-day period. Impacts include reduced crop yields, poor pasture conditions, and the need for supplemental feeding of livestock. The current drought situation was exacerbated by this weekโ€™s intense heat, with average maximum temperatures ranging from 95 to 100 deg F in areas of eastern Montana, northern and eastern Wyoming, and western portions of South Dakota, Nebraska, and Kansas…

Colorado Drought Monitor one week change map ending September 6, 2022.

West

Out West, an anomalous upper-level ridge parked over the central Great Basin during the past weekโ€”leading to a dangerous heat wave and record-high temperatures across the region. The record heat exacerbated fire-weather conditions across Northern California, the Pacific Northwest, and the Northern Rockies as well as taxed Californiaโ€™s power grid in response to the record-high demand reported this week. Most of the region saw no precipitation this week, except for some isolated storm activity in western Washington, Arizona, eastern Colorado, and eastern New Mexico. On this weekโ€™s map, areas of drought expanded in southwestern and central Montana, and in northern Wyoming. Areas of Extreme Drought (D3) in the Four Corners region were trimmed back as part of a re-assessment of the impact of monsoonal rainfall during the past several months. Looking at reservoir storage conditions, the two largest reservoirs in the Colorado River system, Lake Mead and Lake Powell, are currently 28% and 24% full, respectively.

South

In the South, widespread improvements were made across Texas this week in response to another round of moderate-to-heavy rainfall that impacted isolated areas of the state, with accumulations ranging from 2 to 6+ inches. The recent rains have provided a much-needed boost to soil moisture and streamflow levels. Despite the recent rains, streamflow levels in some areas of the Hill Country have yet to recover, with gaging stations on numerous rivers and creeks reporting below-normal flows (ranging from the 2nd to the 24th percentile), according to the U.S. Geological Survey. Elsewhere in the region, this weekโ€™s rainfall led to improvements in eastern Oklahoma, northern Arkansas, northern Mississippi, and western portions of Tennessee. For the past 30-day period, much of the region experienced above-normal precipitation with the greatest positive departures (ranging from 6 to 12+ inches) observed in the Basin and Range and southern portion of the Gulf Coastal Plains of Texas, northern Louisiana, and central Mississippi. Overall, average temperatures for the week were within a few degrees of normal, with larger negative departures (2 to 4 deg F below normal) observed in western Texas.

Looking Ahead

The NWS WPC 7-Day Quantitative Precipitation Forecast (QPF) calls for moderate-to-heavy precipitation accumulations ranging from 2 to 5+ inches across areas of the Southeast including Georgia, Florida, and South Carolina. Likewise, 2 to 4+ inch accumulations are forecasted for areas of the Upper Midwest in Wisconsin and Upper Peninsula Michigan. Conversely, lighter accumulations (<1.5 inches) are expected across eastern portions of the South, Lower Midwest, Mid-Atlantic, and the southern extent of the Northeast. Out West, accumulations of less than an inch are expected in areas of Southern California including the Mojave Desert, Transverse Ranges, and the southern Sierra. Elsewhere, areas of the central Great Basin, Northern Arizona, and Northern Rockies are expected to receive modest rainfall accumulations. The CPC 6-10-day Outlooks calls for a moderate-to-high probability of above-normal temperatures across the West, the Plains states, and along much of the Eastern Seaboard. Below-normal temperatures are expected across the Pacific Northwest and the Upper Midwest while there is a low-to-moderate probability of below-normal temperatures across areas of the South and Lower Midwest. In terms of precipitation, below-normal precipitation is expected across the South, Plains states, and Upper Midwest, whereas above-normal precipitation is expected across much of the West, and East Coast. In Alaska, above-normal precipitation is forecasted across much of the Interior, Southwest, and Southcentral, while areas of the southern Panhandle have a low-probability of below-normal precipitation.

US Drought Monitor one week change map ending September 6, 2022.

Just for grins here’s a gallery of early September Drought Monitor maps for the past few years.

#Colorado #Water #Conservation Board studying possible expansion of Bear Creek Lake — CBS Colorado

Following heavy rains which fell mid-September 2013 in Colorado, the pool elevation at the Bear Creek reservoir rose several feet. At 4 a.m., Sept. 15, the reservoir pool elevation surpassed its previous record elevation of 5587.1 feet, and peaked at a pool elevation of 5607.9 ft on Sept. 22, shown here. Bear Creek Dam did what it was designed to do by catching the runoff and reducing flooding risks to the hundreds of homes located downstream.

Click the link to read the article on the CBS Colorado website (Ben Warwick). Here’s an excerpt:

The Colorado Water Conservation Board, Army Corps of Engineers and City of Lakewood partnered on a study to examine gaps in water supply and demand, as part of the Colorado Water Plan. The study looked at several different scenarios to forecast and address water supply gaps through the year 2050. The South Platte Basin, which serves the Denver metro area, Northern Colorado, and the northeastern plains, is projected to have a gap anywhere between 509,000 acre-feet and 835,000 acre-feet per year.ย 

The CWCB and Army Corps of Engineers chose Bear Lake because it has an existing dam and provides an opportunity to store more water at what the group calls a more reasonable cost. The study is examining whether an expansion can decrease the supply/demand gap, possible impacts to flood control, and environmental and recreational impacts.ย 

If deemed feasible, funding for expansion and enhancement of recreational areas and open space would be a large part of the project.ย 

There is no set timeline for the project. The feasibility study is ongoing.

#Water #conservation efforts to thwart #drought delusional — The Boulder City Review #ColoradoRiver #COriver #aridification

Alfalfa harvest via the Western Farm Press.

Click the link to read the guest column on the Boulder City Review website (Rod Woodbury). Here’s an excerpt:

Over the last two decades, however, the river has generated average flows of only 12.3 million acre-feet annually, a huge shortfall despite serious municipal conservation and reuse efforts. Southern Nevada has led the way in those laudable efforts. Despite adding 750,000 to our population since 2000, weโ€™ve somehow managed to cut consumptive use by 26 percent due to aggressive conservation and recycling programs. Still, itโ€™s not nearly enough. Global warming and the megadrought are projected to continue, which means river flows and lake levels will keep plummeting without drastic policy changes. Weโ€™re now only 90 feet above the โ€œdead poolโ€ level at which Hoover Dam will cease generating electricity.

And itโ€™s no longer alarmist to prophesy that it could happen within our lifetime or even the next decade. Thatโ€™s why the federal government recently issued its first-ever shortage declarations, reducing Nevada, Arizona and Mexicoโ€™s collective allocations by over 700,000 acre-feet annually, then tasking the seven river states to create a collaborative plan cutting an additional 2-4 million acre-feet annually next year.

So, hereโ€™s where I get brutally honest, which always seems to get me in big trouble. But Iโ€™ll say it anyway. Nevada isnโ€™t the problem. If we were feeling generous, Nevadans could permanently donate back our entire annual allocation and it wouldnโ€™t even make a dent. River flows would still be woefully insufficient to supply current uses and Lake Mead would still be rapidly draining. Of course, just because Nevada isnโ€™t the problem doesnโ€™t mean we canโ€™t be part of the solution. Southern Nevadans should continue our conservation and recycling efforts, even if only to set an example and because itโ€™s the right thing to do. But we need to stop pretending that eliminating more Clark County lawns, reducing the size of more (Las) Vegas golf courses and swimming pools, or even recycling all 1 million gallons of Boulder Cityโ€™s daily wastewater will somehow solve the systemic river and lake problems. It wonโ€™t. Nevada amounts to nothing more than a statistical rounding error in the riverwide problem, and absolutely nothing Nevadans do to better conserve or recycle is going to change that…

Domestic water use also isnโ€™t the problem. Nor are golf courses and resorts. If we completely wiped out the residential populations of Nevada, Utah, Wyoming and New Mexico, for instance, drying up millions or acres of turf and water features in the process, the lake would still be dropping.

Letโ€™s be honest. Desert agriculture is the real problem source. It uses approximately 80 percent of the Colorado Riverโ€™s water to irrigate 15 percent of the nationโ€™s farmland, producing a high percentage of winter fruits and vegetables. In fact, 20 percent of the entire Colorado River systemโ€™s output is channeled across the desert to a few wealthy landowners in Californiaโ€™s once-arid but now-productive Imperial Valley. And growers of cattle feed like alfalfa are by far the biggest river water consumers. So, if we really want to solve our Colorado River problem, then desert agriculture either needs to evaporate out of existence like the water it uses or become vastly more efficient. The best way to ensure that happens is to let the market dictate price. Make agriculture, commercial and industrial users pay for every drop they use, sending it to the highest bidders. With the market in control, weโ€™ll be shocked how quickly irrigation ditches get lined with concrete, recycling projects ramp up and the lake start rising again.

Brad Udall: Hereโ€™s the latest version of my 4-Panel plot thru Water Year (Oct-Sep) of 2021 of the Colorado River big reservoirs, natural flows, precipitation, and temperature. Data (PRISM) goes back or 1906 (or 1935 for reservoirs.) This updates previous work with @GreatLakesPeck. Credit: Brad Udall via Twitter

Intense heat waves and flooding are battering electricity and water systems, as Americaโ€™s aging infrastructure sags under the pressure of climateย change

Volunteers distributed bottled water after Jackson, Mississippiโ€™s water treatment plant failed during flooding in August 2022. Brad Vest/Getty Images

Paul Chinowsky, University of Colorado Boulder

The 1960s and 1970s were a golden age of infrastructure development in the U.S., with the expansion of the interstate system and widespread construction of new water treatment, wastewater and flood control systems reflecting national priorities in public health and national defense. But infrastructure requires maintenance, and, eventually, it has to be replaced.

That hasnโ€™t been happening in many parts of the country. Increasingly, extreme heat and storms are putting roads, bridges, water systems and other infrastructure under stress.

Two recent examples โ€“ an intense heat wave that pushed Californiaโ€™s power grid to its limits in September 2022, and the failure of the water system in Jackson, Mississippi, amid flooding in August โ€“ show how a growing maintenance backlog and increasing climate change are turning the 2020s and 2030s into a golden age of infrastructure failure.

I am a civil engineer whose work focuses on the impacts of climate change on infrastructure. Often, low-income communities and communities of color like Jackson see the least investment in infrastructure replacements and repairs.

Crumbling bridge and water systems

The United States is consistently falling short on funding infrastructure maintenance. A report by former Federal Reserve Board Chairman Paul Volckerโ€™s Volcker Alliance in 2019 estimated the U.S. has a US$1 trillion backlog of needed repairs.

Over 220,000 bridges across the country โ€“ about 33% of the total โ€“ require rehabilitation or replacement.

A water main break now occurs somewhere in the U.S. every two minutes, and an estimated 6 million gallons of treated water are lost each day. This is happening at the same time the western United States is implementing water restrictions amid the driest 20-year span in 1,200 years. Similarly, drinking water distribution in the United States relies on over 2 million miles of pipes that have limited life spans.

The underlying issue for infrastructure failure is age, resulting in the failure of critical parts such as pumps and motors.

Aging systems have been blamed for failures of the water system in Jackson, wastewater treatment plants in Baltimore that leaked dangerous amounts of sewage into the Chesapeake Bay and dam failures in Michigan that have resulted in widespread damage and evacuations.

Inequality in investment

Compounding the problem of age is the lack of funds to modernize critical systems and perform essential maintenance. Fixing that will require systemic change.

Infrastructure is primarily a city and county responsibility financed through local taxes. However, these entities are also dependent on state and federal funds. As populations increase and development expands, local governments have cumulatively had to double their infrastructure spending since the 1950s, while federal sources remained mostly flat.

Congressional Budget Office

Inequity often underlies the growing need for investment in low-income U.S. communities.

Over 2 million people in the United States lack access to safe drinking water and basic sanitation. The greatest predictor of those who lack this access is race: 5.8% of Native American households lack access, while only 0.3% of white households lack access. In terms of sanitation, studies in predominantly African American counties have found disproportionate impacts from nonworking sewage systems.

Jackson, a majority-Black state capital, has dealt with water system breakdowns for years and has repeatedly requested infrastructure funding from the state to upgrade its struggling water treatment plants.

Climate change exacerbates the risk

The consequences of inadequate maintenance are compounded by climate change, which is accelerating infrastructure failure with increased flooding, extreme heat and growing storm intensity.

Much of the worldโ€™s infrastructure was designed for an environment that no longer exists. The historic precipitation levels, temperature profiles, extreme weather events and storm surge levels those systems were designed and built to handle are now exceeded on a regular basis.

Unprecedented rainfall in the California desert in 2015 tore apart a bridge over Interstate 10, one of the stateโ€™s most important east-west routes. Temperatures near 120 degrees Fahrenheit (49 C) forced the Phoenix airport to cancel flights in 2017 out of concern the planes might not be able to safely take off.

A heat wave in the Pacific Northwest in 2020 buckled roads and melted streetcar cables in Portland. Amtrak slowed its train speeds in the Northeast in July 2022 out of concern that a heat wave would cause the overhead wires to expand and sag and rails to potentially buckle.

Washed out road in Yellowstone National Park
Fast-moving floodwater obliterated sections of major roads through Yellowstone National Park in June 2022. Jacob W. Frank/National Park Service

Power outages during Californiaโ€™s September 2022 heat wave are another potentially life-threatening infrastructure problem.

The rising costs of delayed repairs

My research with colleagues shows that the vulnerability of the national transportation system, energy distribution system, water treatment facilities and coastal infrastructure will significantly increase over the next decade due to climate change.

We estimate that rail infrastructure faces additional repair costs of $5 billion to $10 billion annually by 2050, while road repairs due to temperature increases could reach a cumulative $200 billion to $300 billion by the end of the century. Similarly, water utilities are facing the possibility of a trillion-dollar price tag by 2050.

A city bus was caught and several people were injured when a bridge collapsed in Pittsburgh in January 2022. Jeff Swensen/Getty Images

After studying the issue of climate change impacts on infrastructure for two decades, with climate projections getting worse, not better, I believe addressing the multiple challenges to the nationโ€™s infrastructure requires systemic change.

Two items are at the top of the list: national prioritization and funding.

Prioritizing the infrastructure challenge is essential to bring government responsibilities into the national conversation. Most local jurisdictions simply canโ€™t afford to absorb the cost of needed infrastructure. The recent infrastructure bill and the Inflation Reduction Act are starting points, but they still fall short of fixing the long-term issue.

Without systemic change, Jackson, Mississippi, will be just the start of an escalating trend.

Paul Chinowsky, Professor of Civil Engineering, University of Colorado Boulder

This article is republished from The Conversation under a Creative Commons license. Read the original article.

Concerns about water rise as #ColoradoRiver negotiations continue — The Rocky Mountain Collegian #COriver #aridification

Colorado River Allocations: Credit: The Congressional Research Service

Click the link to read the article on the Rocky Mountain Collegian website (Ivy Secrest):

Dry, hot air settles over a small suburb in Fort Collins. The heat pushes residents indoors to crank the air conditioning, and the constant spurt of sprinklers is the only sound breaking the midday silence.ย This is a common occurrence of exceptional waste that may need to become a scene that only exists in memory, especially for states like Colorado.

Colorado has been experiencingย drought conditionsย on and off for decades. And combating the issue of water scarcity in the region has been a priority for the states that rely on Coloradoโ€™s water resources.

โ€œAs a headwater state, weโ€™re a really critical location in terms of the different rivers that originate in Colorado,โ€ said Melinda Laituri, professor emeritus in ecosystem science and sustainability at Colorado State University.

One of these rivers is the Colorado River, theย sixth-longestย river in the country, which serves nearly 40 million people. Itโ€™s a critical resource for the Southwest United States and Mexico.

โ€œThe lower basin and the southern half of the upper basin had been in drought for 22 years,โ€ said Steven Fassnacht, a snow hydrologist and professor at CSU.ย 

Governor Clarence J. Morley signing Colorado River compact and South Platte River compact bills, Delph Carpenter standing center. Unidentified photographer. Date 1925. Print from Denver Post. From the CSU Water Archives

ย The Colorado River Compact of 1922ย has been a focus, as the rights established in the compact are beingย renegotiatedย to protect the river. [ed. this statement is not correct, no renegotiation of the Compact is in the works.]

A lot of this water access is dependent on snowpack. From the flow of the Colorado River to ground water resources, snow isย integralย to water access, and Colorado is simply not getting the amount it used to.ย 

โ€œFrom the mid โ€™30s to the mid โ€™70s, the snowpack was actually increasing,โ€ Fassnacht said. โ€œAnd since then, the trend has been a decrease in the snowpack.โ€ย 

This is particularly concerning when resources are used to manufacture snow for skiing or water lawns that arenโ€™t beneficial to local ecosystems. The larger ecological impacts Colorado has been facing, like fires and excess use of resources, have to be considered.ย 

The aftermath of July 2021 floods in Poudre Canyon, west of Fort Collins. (Credit: Colorado Parks and Wildlife)

โ€œIf you burn the hillside, then you really increase the likelihood that youโ€™re going to have rainfall causing erosion,โ€ Fassnacht said. โ€œYouโ€™ve got a lot of sediment that ends up in the river. Ash is terrible for the water treatment plants.โ€

Think of what it would mean to have ash in your drinking water or even just damaging water treatment facilities. This reality means the way we interact with water may have to drastically change in order to protect it.ย 

โ€œWe have the expectation that we can go to the tap and turn it on and water will be there,โ€ Laituri said.ย 

Even using your sprinklers in the middle of the day or overusing natural resources by running your AC all of the time can have serious impacts on water resources and the ecosystems they serve.ย 

โ€œIt comes down to education too because not everyone is a watershed scientist,โ€ said Eric Williams,ย president of the Watershed Science Clubย at Colorado State University.

Williams said lawns and developers should concern the public in regard to water use.

โ€œI think if we want to point the finger at something, it should be all of these lawns that we have,โ€ Fassnacht said. โ€œIโ€™m not saying letโ€™s get rid of every last piece of lawn, but letโ€™s be a lot more strategic.โ€ย 

This is not a new idea. Nevada has begun toย remove lawns, and the City of Fort Collins has an initiative toย encourage xeriscaping, the replacement of lawn with local plants that fare better in drought conditions. Participating in these programs and educating yourself, Williams said, are some of the best ways to get involved. However, the average citizen canโ€™t simply stop watering their lawn and expect the drought to no longer exist.ย 

โ€œI donโ€™t know if this can be really driven at the individual level,โ€ Laituri said. โ€œYes, it makes us feel good to do things that we feel are contributing. โ€ฆ Will that be enough? Itโ€™s the larger water users that are going to have to really come to the table.โ€

We cannot continue to live in a world wherein wealthy citizens andย major celebritiesย can abuse their water allocations while others go without access to clean water at all. The issue of water scarcity is an elaborate entanglement of social justice and environmental concern, meaning the resource must first be treated like a necessity before it can be allocated for luxury.ย 

Native American lands where tribes have water rights or potential water rights to Colorado River water. Graphic via Ten Tribes Partnership via Colorado River Water Users Association website.

โ€œThereโ€™s 30 federally recognized (Indigenous) tribes across the lower basin that should have access to water, and many other reservations actually donโ€™t have running water,โ€ Laituri said. โ€œAssuring that they have access to that resource is part of this conversation.โ€

Indigenous groups were not included in the Colorado River Compact, and as some of the mostย prominent advocatesย of water rights, they have a lot to contribute to the conversation.

Indigenous groups are not the only population to be considered as water rights are negotiated. Laituri emphasized new populations coming to Fort Collins should be considered.ย 

Laituri said if we want to conserve water, we need to consider the stateโ€™s capacity when developing. We need to consider if we can house more people and if itโ€™s responsible to continue this growth in population.ย 

While the concerns around the river are complex and still not fully understood, that doesnโ€™t mean action isnโ€™t being taken. And it doesnโ€™t mean there arenโ€™t any solutions.ย 

โ€œPlease be curious,โ€ Williams said. โ€œNo question is (a) dumb question.โ€ย 

Reach Ivy Secrest atย life@collegian.comย or on Twitterย @IvySecrest

#SouthPlatteRiver Surfers Want Updated #COWaterPlan to Go With the Flowย — Westword

The second wave at River Run Park, Benihanas, is a high-speed, dynamic wave that gives up great rides but can be challenging to surf for beginners. Once you have it dialed, itโ€™s one of the best high-performance waves in the state. It features a wave shaper โ€“ a set of three adjustable plates underneath the water that allow the wave to be dialed for particular flows. At higher flows (from 250 cfs to over 750 cfs) the wave creates a large A-Frame wave that can run from waist to chest high. Under 180 cfs, the wave is usually too weak to hold a surfer. Photo credit: EndlessWaves.net

Click the link to read the article on the Westword website (Catie Cheshire). Here’s an excerpt:

People who use the South Platte River for recreation, particularly river surfers, are hoping the next iteration of the Colorado Water Plan will include stronger language about the importance of recreation on the river. An updated version of the plan originally developed in 2015 during the John Hickenlooper administration will take effect in 2023, and the public can currently weigh in on the Colorado Department of Natural Resources draft. David Riordon, an avid river surfer in Denver, says he was pleasantly surprised that the draft indicated a positive approach to recreation, but hopes there will be more specifics regarding the use of the South Platte in the final document. While Riordon recognizes that the plan must tackle big issues across the state, he points out that river surfers keep a close eye on the South Platte’s status in metro Denver when they spend time on the waves at River Run Park in Englewood. โ€œWe see what comes by us or what doesn’t come by us,โ€ Riordon says. โ€œThat could be water. It could be people. It could be fish, it could be trash. It could be plants. All kinds of stuff comes by us.โ€

Currently, river surfers gauge several factors, such as the discharge from Chatfield Reservoir and the City of Englewood, to see if the water is running at enough cubic feet per second to surf, generally 180 cfs. Riordon thinks the flow of the South Platte should be controlled the way it is on the Arkansas River, where a voluntary flow management program ensures that the Arkansas will be high enough for recreation during summer months, including rafting and fishing…Although the agreement guiding the Arkansas River program is between the Colorado DNRColorado Parks and Wildlife, Trout Unlimited, the Southeastern Colorado Water Conservancy District and the Arkansas River Outfitters Association, the U.S. Bureau of Reclamation actually operates it, measuring the reservoirs and controlling the outlet gates to ensure a constant flow of at least 700 cfs from July 1 to August 15. It also maintains a 250 cfs level during fall and winter months to improve conditions for trout. To create something similar on the South Platte, Riordon, who’s president of the Colorado River Surfers Association, hopes to connect with other stakeholders to apply for a grant from the Metro Basin Roundtable to determine if the idea would be feasible…

The new iteration [of the Colorado Water Plan] includes goals for protecting and enhancing both environmental and recreational attributes of the South Platte. Compared to the first version, completed before the original 2015 Colorado Water Plan, it takes a stronger stance on social justice and ensuring equitable access to recreation on the river, [Sean Chambers] continues.

The South Platte River Basin is shaded in yellow. Source: Tom Cech, One World One Water Center, Metropolitan State University of Denver.

Navajo Dam operations update (September 8, 2022): Bumping up to 850 cfs #SanJuanRiver #ColoradoRiver #COriver #aridification

Fly fishers on the San Juan River below the Navajo Dam.U.S. Bureau of Reclamation

From email from Reclamation (Susan Novak Behery):

In response to a hot dry weather pattern and continued decreasing flows in the critical habitat reach, the Bureau of Reclamation has scheduled an increase in the release from Navajo Dam from 750 cubic feet per second (cfs) to 850 cfs for tomorrow, September 8th, at 4:00 AM.ย 

Releases are made for the authorized purposes of the Navajo Unit, and to attempt to maintain a target base flow through the endangered fish critical habitat reach of the San Juan River (Farmington to Lake Powell).ย  The San Juan River Basin Recovery Implementation Program recommends a target base flow of between 500 cfs and 1,000 cfs through the critical habitat area. ย The target base flow is calculated as the weekly average of gaged flows throughout the critical habitat area from Farmington to Lake Powell.ย  This scheduled release change is calculated to be the minimum required to meet the minimum target baseflow.

Court rejects #Wyoming, industry challenge to Biden administration postponement of oil, gas lease sales — Western Environmental Law Center #KeepItInTheGround #ActOnClimate

Cheyenne circa 1868 via Legends of America

Click the link to read the release on the Western Environmental Law Center website:

A federal judge in Wyomingย affirmedย on Friday the Biden administrationโ€™s decisions to postpone oil and gas lease sales in early 2021, holding that the federal government has broad authority to postpone sales in order to address environmental concerns.

The Wyoming court rejected across the board the arguments by industry and Wyoming, and found that the Bureau of Land Management (BLM) acted within its legal authority under the Mineral Leasing Act, National Environmental Policy Act (NEPA), and other laws when it postponed lease sales in order to ensure that it fully considered the environmental harms they could cause. The court also held that industry and Wyoming lacked standing to challenge the postponement.

โ€œWe find it reassuring that the court affirmed the Bureau of Land Managementโ€™s authority to postpone oil and gas lease sales in order to make certain they adhere to the law,โ€ย said Melissa Hornbein, senior attorney at the Western Environmental Law Center. โ€œThe judge called out as nonsensical the state and industry groupโ€™s argument that postponing a lease to ensure compliance with the National Environmental Policy Act (NEPA) requires a NEPA analysis of its own. This suggests any appeal of this decision will have an uphill battle in court.โ€

โ€œWeโ€™re pleased the Judge affirmed the Department of the Interior has significant discretion to decide when to offer public oil and gas resources at lease sales. The law requires Interior to serve the public interest by analyzing and considering the environmental and social costs of leasing before holding lease sales, and thatโ€™s what they did,โ€ย said Bob LeResche, Powder River Basin Resource Council Board member from Clearmont, Wyoming. โ€œLast year BLM initiated a comprehensive review of the federal oil and gas program, and this is the perfect time for the Department to complete their review and fully reform the federal oil and gas program to better protect taxpayers, communities, and the environment. We call on them to do so.โ€

In early 2021, the Biden administration issued an executive order aimed at tackling the climate crisis, which directed the Department of the Interior to temporarily pause new oil and gas leasing on federal lands and offshore waters. The pause was meant to provide the federal government an opportunity to undertake a systematic review of its oil and gas program and consider how to address its climate impacts. Before Interior could decide how to implement the executive order, it was targeted in five lawsuits filed by industry trade associations and Republican-led states. Fridayโ€™s ruling came in two of those lawsuits, brought by the State of Wyoming, Western Energy Alliance (WEA), and the Petroleum Association of Wyoming. Earthjustice and the Western Environmental Law Center (WELC) intervened on behalf of 21 groups to defend the lease sale postponements and leasing pause.

โ€œThis ruling is a victory for people who cherish public lands, and the communities whose livelihoods are intertwined with these special places,โ€ย said Ben Tettlebaum, senior staff attorney with The Wilderness Society.ย โ€œThe court rightly affirmed that our public lands are not up for a fire sale to the fossil fuel industry whenever it chooses. The Interior Department has the clear authority to manage these lands for conservation, wildlife, and the health and well-being of communities who rely on them.โ€

The Wyoming ruling follows an August 18 ruling from the Western District of Louisiana Louisiana thatย permanently blocked a blanket leasing pause in thirteen statesย (not including Wyoming) that had sued over the executive order in Louisiana District Court. The Louisiana ruling came one day after the 5thย Circuit Court of Appeals overturned a preliminary injunction previously issued by the Louisiana court, finding that it lacked adequate โ€œspecificity.โ€ Similar to the Wyoming decision, however, the August 18 Louisiana ruling appears to permit the government to postpone sales based on National Environmental Policy Act (NEPA) and other concerns.

โ€œGiven the climate crisis and its superstorms, floods, fires, and droughts, itโ€™s essential that the President have the authority to control oil and gas leasing โ€“ or deny leasing โ€“ on mineral deposits owned by the American people,โ€ย said Erik Molvar, executive director with Western Watersheds Project.ย โ€œFridayโ€™s ruling puts the federal government back in the driverโ€™s seat for managing federal mineral deposits and paves the way for keeping oil and gas in the ground.โ€

โ€œBLM has never adequately considered the impacts of its fossil fuel leasing program on climate,โ€ย said Peter Hart, attorney at Wilderness Workshop. โ€œCourts across the country have found BLMโ€™s leasing decisions illegal based on this failure. This opinion confirms that BLM doesnโ€™t have to continue selling leases that donโ€™t comply with law. Instead, the agency should STOP and consider the real impacts of more leasing. After that, we may all agree: โ€˜it isnโ€™t worth it!โ€™โ€

โ€œThe climate induced disasters keep stacking up, from mega droughts and catastrophic floods to wildfires and unhealthy air. Business as usual is not working,โ€ย said Anne Hedges, director of policy for the Montana Environmental Information Center. โ€œThe President simply must have the ability to take the time necessary to find a better path forward. Peopleโ€™s lives, livelihoods and communities depend on getting this right. This pause is a small step in the right direction.โ€

โ€œThe court reaffirmed the federal governmentโ€™s long-standing obligation to protect the environment and public interest, not just sell off lands when demanded by oil and gas companies,โ€ย said Michael Freeman, senior attorney with Earthjusticeโ€™s Rocky Mountain Office. โ€œWe hope the Biden administration will exercise that authority to limit new oil and gas leasing and avoid the worst impacts of the climate crisis.โ€

โ€œThis welcome decision affirms that the Biden administration has wide latitude to rein in federal fossil fuels,โ€ย said Taylor McKinnon with the Center for Biological Diversity.ย โ€œAllowing any new fossil fuel projects, including oil and gas leasing, is flatly incompatible with avoiding catastrophic climate change. The administration still has much work to do to bring federal fossil fuel production to a swift and orderly end.โ€

โ€œThe law is clear, the oil and gas industry doesnโ€™t have a right to frack public lands,โ€ย said Jeremy Nichols, WildEarth Guardiansโ€™ Climate and Energy Program Director. โ€œAnd given our climate crisis, itโ€™s more critical than ever to ensure the industry is not fracking public lands.โ€

โ€œThis decision shows that the Department of Interior is not beholden to the fossil fuel industry, as many states and industry groups have alleged,โ€ย said Adam Carlesco, staff attorney with Food & Water Watch. โ€œGiven this understanding of its legal authority, Interior must move towards a future where public lands are protected for a variety of uses โ€“ not simply used as sacrifice zones for a polluting industry that is exacerbating our climate crisis.โ€

โ€œThis decision marks a step forward in ensuring our public lands are part of the climate solution, not the problem,โ€ย said Dan Ritzman, Director of the Sierra Clubโ€™s Lands Water Wildlife Campaign. โ€œAt a time when we need to be rapidly transitioning away from dirty oil and gas to meet our climate commitments and avoid the worst of the climate crisis, the last thing we need is to sell off even more of our treasured public lands to the fossil fuel industry.โ€

Earthjustice and the Western Environmental Law Center represent a coalition of conservation and citizen groups in the Wyoming litigation. Earthjustice represents Conservation Colorado, Friends of the Earth, Great Old Broads for Wilderness, National Parks Conservation Association, Sierra Club, Southern Utah Wilderness Alliance, The Wilderness Society, Valley Organic Growers Association, Western Colorado Alliance, Western Watersheds Project, and Wilderness Workshop. The Western Environmental Law Center represents Center for Biological Diversity, Citizens for a Healthy Community, Dinรฉ Citizens Against Ruining Our Environment, Earthworks, Food & Water Watch, Indian Peopleโ€™s Action, Montana Environmental Information Center, Powder River Basin Resource Council, Western Organization of Resource Councils, and WildEarth Guardians.

Contacts:

Melissa Hornbein, Western Environmental Law Center, 406-471-3173,ย hornbein@westernlaw.org

Perry Wheeler, Earthjustice, 202-792-6211,ย pwheeler@earthjustice.org

Taylor McKinnon, Center for Biological Diversity, 801-300-2414,ย tmckinnon@biologicaldiversity.org

Kerry Leslie, The Wilderness Society, 415-398-1484,ย kerry_leslie@tws.org

Anne Hedges, Montana Environmental Information Center, 406-443-2520,ย ahedges@meic.org

Shannon Anderson, Powder River Basin Resource Council, 307-763-0995,ย sanderson@powderriverbasin.org

Jeremy Nichols, WildEarth Guardians, 303-437-7663,ย jnichols@wildearthguardians.org

Medhini Kumar, Sierra Club,ย medhini.kumar@sierraclub.org

Wyoming rivers map via Geology.com

World Meteorological Organization #AirQuality and #Climate Bulletin highlights impact of #wildfire #ActOnClimate #KeepItInTheGround

Photo credit: World Meteorological Organization

Click the link to read the bulletin on the WMO website:

Increasing risk of โ€œclimate penaltyโ€ from pollution and climate change

An anticipated rise in the frequency, intensity and duration of heatwaves and an associated increase in wildfires this century is likely to worsen air quality, harming human health and ecosystems. The interaction between pollution and climate change will impose an additional โ€œclimate penaltyโ€ for hundreds of millions of people, according to a new report from the World Meteorological Organization (WMO).

Theย annual WMO Air Quality and Climate Bulletinย reports on the state of air quality and its close interlinkages with climate change. The bulletin explores a range of possible air quality outcomes under high and low greenhouse gas emission scenarios.

The WMO Air Quality and Climate Bulletin 2022 focuses in particular on the impact of wildfire smoke in 2021. As in 2020, hot and dry conditions exacerbated the spread of wildfires across western North America and Siberia, producing widespread increases in particulate small matter ( PM2.5) levels harmful to health.

โ€œAs the globe warms, wildfires and associated air pollution are expected to increase, even under a low emissions scenario. In addition to human health impacts, this will also affect ecosystems as air pollutants settle from the atmosphere to Earthโ€™s surface,โ€ says WMO Secretary-General Prof. Petteri Taalas.

โ€œWe have seen this in the heatwaves in Europe and China this year when stable high atmospheric conditions, sunlight and low wind speeds were conducive to high pollution levels,โ€ said Prof. Taalas.

โ€œThis is a foretaste of the future because we expect a further increase in the frequency, intensity and duration of heatwaves, which could lead to even worse air quality, a phenomenon known as the โ€œclimate penalty,โ€ he said.

The โ€œclimate penaltyโ€ refers specifically to the climate change amplification effect on ground-level ozone production, which negatively impacts the air people breathe. The regions with the strongest projected climate penalty โ€“ mainly in Asia – are home to roughly one quarter of the world’s population. Climate change could exacerbate surface ozone pollution episodes, leading to detrimental health impacts for hundreds of millions of people.

The Air Quality and Climate Bulletin, the second in an annual series, and anย accompanying animationย on atmospheric deposition was published ahead of International Day of Clean Air for blue skies on 7 September. The theme of this yearโ€™s event, spearheaded by the UN Environment Programme, isย The Air We Share, focusing on the transboundary nature of air pollution and stressing the need for collective action.

The bulletin is based on input from experts in WMOโ€™s Global Atmosphere Watch network which monitors air quality and greenhouse gas concentrations and so can quantify the efficacy of the policies designed to limit climate change and improve air quality.

Air quality and climate are interconnected because the chemical species that lead to a degradation in air quality are normally co-emitted with greenhouse gases. Thus, changes in one inevitably cause changes in the other. The combustion of fossil fuels (a major source of carbon dioxide (CO2)) also emits nitrogen oxide (NO), which can react with sunlight to lead to the formation of ozone and nitrate aerosols.

Air quality in turn affects ecosystem health via atmospheric deposition (as air pollutants settle from the atmosphere to Earthโ€™s surface).ย  Deposition of nitrogen, sulfur and ozone can negatively affect the services provided by natural ecosystems such as clean water, biodiversity, and carbon storage, and can impact crop yields in agricultural systems.

Wildfires in 2021

The European Unionโ€™s Copernicus Atmosphere Monitoring Service measures global particulate matter. PM2.5ย (i.e. particulate matter with a diameter of 2.5 micrometers or smaller) is a severe health hazard if inhaled over long periods of time. Sources include emissions from fossil fuel combustion, wildfires and wind-blown desert dust.

Intense wildfires generated anomalously high PM2.5ย concentrations in Siberia and Canada and the western USA in July and August 2021. PM2.5ย concentrations in eastern Siberia reached levels not observed before, driven mainly by increasing high temperatures and dry soil conditions.

The annual total estimated emissions in Western North America ranked amongst the top five years of the period 2003 to 2021, with PM2.5ย concentrations well above limits recommended by the World Health Organization.

At the global scale, observations of the annual total burned area show a downward trend over the last two decades as a result of decreasing numbers of fires in savannas and grasslands (2021 WMO Aerosol Bulletinย ). However, at continental scales, some regions are experiencing increasing trends, including parts of western North America, the Amazon and Australia.

Future scenarios

The Intergovernmental Panel on Climate Change (IPCC) Sixth Assessment Report (AR6) includes scenarios on the evolution of air quality as temperatures increase in the 21st century. It has assessed that the probability of catastrophic wildfire events โ€“like those observed over central Chile in 2017, Australia 2019 or the western United States in 2020 and 2021โ€“ is likely to increase by 40-60% by the end of this century under a high emission scenario, and by 30-50% under a low emission scenario.

If greenhouse gas emissions remain high, such that global temperatures rise by 3ยฐ C from preindustrial levels by the second half of the 21st century, surface ozone levels are expected to increase across heavily polluted areas, particularly in Asia. This includes a 20% increaseย  across Pakistan, northern India and Bangladesh, and 10% across eastern China.ย  Most of the ozone increase will be due to an increase in emissions from fossil fuel combustion, but roughly a fifth of this increase will be due to climate change, most likely realized through increased heatwaves, which amplify air pollution episodes. Therefore heatwaves, which are becoming increasingly common due to climate change, are likely to continue leading to a degradation in air quality.

Projected changes in surface ozone levels due to climate change alone in the late part of the 21st Century (2055-2081), if average global surface temperature rises by 3.0 ยฐC above the average temperature of the late 19th Century (1850-1900).ย  Credit: WMO

A worldwide carbon neutrality emissions scenario would limit the future occurrence of extreme ozone air pollution episodes.ย  This is because efforts to mitigate climate change by eliminating the burning of fossil fuels (carbon-based) will also eliminate most human-caused emissions of ozone precursor gases (particularly nitrogen oxides (NOx), Volatile Organic Compounds and methane).ย 

Particulate matter, commonly referred to as aerosols, have complex characteristics which can either cool or warm the atmosphere. High aerosol amounts โ€“ and thus poor air quality – can cool the atmosphere by reflecting sunlight back to space, or by absorbing sunlight in the atmosphere so that it never reaches the ground.

The IPCC suggests that the low-carbon scenario will be associated with a small, short-term warming prior to temperature decreases. This is because the effects of reducing aerosol particles, i.e. less sunlight reflected into space, will be felt first, while the temperature stabilization in response to reductions in carbon dioxide emissions will take longer.ย  However, natural aerosol emissions (e.g., dust, wildfire smoke) are likely to increase in a warmer, drier environment due to desertification and drought conditions, and may cancel out some of the effects of the reductions in aerosols related to human activities.

A future world that follows a low-carbon emissions scenario would also benefit from reduced deposition of nitrogen and sulfur compounds from the atmosphere to the Earthโ€™s surface, where they can damage ecosystems.ย  The response of air quality and ecosystem health to proposed future emissions reductions will be monitored by WMO stations around the world, which can quantify the efficacy of the policies designed to limit climate change and improve air quality. WMO will therefore continue to work with a wide range of partners including theย World Health Organizationย and the EUโ€™s Copernicus Atmospheric Monitoring Service to monitor and mitigate the impacts.

The World Meteorological Organization is the United Nations Systemโ€™s authoritative voiceย on Weather, Climate and Water

For further information contact: Clare Nullis, WMO media officer,ย cnullis@wmo.int. Tel 41-79-7091397

#ColoradoRiver โ€˜stalemateโ€™ continues — The #Gunnison Country Times #COriver #aridifcation

Click the link to read the article on the Gunnison Country Times website (Alan Wartes). Here’s an excerpt:

On Aug. 16, the Bureau of Reclamation (BOR) issued a press release restating the urgency of the situation and laying out actions it will take in coming months to protect water levels in Lake Mead and Lake Powell.

โ€œEvery sector in every state has a responsibility to ensure that water is used with maximum efficiency. In order to avoid a catastrophic collapse of the Colorado River System and a future of uncertainty and conflict, water use in the Basin must be reduced,โ€ Assistant Secretary for Water and Science Tanya Trujillo said. โ€œThe Interior Department is employing prompt and responsive actions and investments to ensure the entire Colorado River Basin can function and support all who rely on it. We are grateful for the hardworking public servants who have dedicated their lives to this work, and who are passionate about the long-term sustainability of Basin states, Tribes, and communities.โ€

โ€œThey said, โ€˜Well, we appreciate all of the efforts, and hereโ€™s what the August 24-month study shows, and hereโ€™s what weโ€™re going to do for the next year, which is basically consistent with the 2007 guidelines with a modification,โ€™โ€ Upper Gunnison River Water Conservancy District General Counsel John McClow said.

That modification from the already existing agreement, McClow said, was to hold 480,000 acre feet of water back in Lake Powell to protect the critical elevation of 3,525 feet, but to treat it as if it went to Lake Mead for the purpose of water accounting.

โ€œSo, nothing new,โ€ McClow said. โ€œBut they said they were still looking to the states to come up with an answer. Basically, I think it was unrealistic to expect the states to deliver a plan to cut the river use by 2 to 4 million acre feet in 60 days. It just wasnโ€™t feasible.โ€

Brad Udall: Hereโ€™s the latest version of my 4-Panel plot thru Water Year (Oct-Sep) of 2021 of the Colorado River big reservoirs, natural flows, precipitation, and temperature. Data (PRISM) goes back or 1906 (or 1935 for reservoirs.) This updates previous work with @GreatLakesPeck. https://twitter.com/bradudall/status/1449828004230664195

The problem remains that aridification in the West has meant significantly less available water in the system over the past 20 years. That is compounded by what some have called a โ€œstructural imbalanceโ€ in how the water is used between the upper and lower basins. In 2021, for instance, the Lower Basin states consumed over 10 million acre-feet of water from the Colorado River, while the Upper Basin states combined consumed 3.5 million acre-feet.

Pipe dream or possible? Experts weigh in on idea of sending Mississippi River water to West — The Palm Springs Desert Sun #ColoradoRiver #COriver #LakePowell #aridification

Map of the Mississippi River Basin. Made using USGS data. By Shannon1 – Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=47308146

Click the link to read the article on the Palm Springs Desert Sun website (Janet Wilson). Here’s an excerpt:

This summer, as seven states and Mexicoย push to meet a Tuesday [August 16, 2022] deadlineย to agree on plans to shore up the Colorado River and itsย shrivelingย reservoirs, retired engineer Don Siefkes of San Leandro, California,ย wrote a letter to The Desert Sun with what he said was aย solution to the West’s water woes: build an aqueduct from the Old River Control Structure to Lake Powell, 1,489 miles west, to refill the Colorado River system with Mississippi River water.ย 

โ€œCitizens of Louisiana and Mississippi south of the Old River Control Structure donโ€™t need all that water. All it does is cause flooding and massive tax expenditures to repair and strengthen dikes,โ€ wrote Siefkes.โ€New Orleans has a problem with that much water anyway, so letโ€™s divert 250,000 gallons/secondย to Lake Powell, which currently has a shortage of 5.5 trillion gallons. This would take 254 days to fill.โ€

[…]

Engineers said theย pipelineย idea is technically feasible. But water expertssaid it would likely take at least 30 years to clear legal hurdles to such a plan. And biologists andย environmental attorneys saidย New Orleans and the Louisiana coast, along with the interior swamplands, need every drop of muddy Mississippi water. The massive river, with tributaries from Montanaย to Ohio, is a national artery for shipping goodsย out to sea. And contrary to Siefkes’ claims, experts said, the silty river flows provide sediment critical to shore up the rapidly disappearing Louisiana coast andย barrier islands chewed to bits by hurricanes and sea rise. Scientists estimate a football field’s worth of Louisiana coast is lost every 60 to 90 minutes.ย Major projects to restore the coast and save brown pelicans and other endangered species are now underway, and Mississippi sediment delivery is at the heart of them…

Nonetheless, Siefkesโ€™ trans-basin pipeline proposal went viral, receiving nearly half a million views. Itโ€™s one of dozens of letters the paperย has received proposing or vehemently opposing schemes to fix the crashing Colorado River system, which provides water to nearly 40 million people and farms in seven western states. Fueled by Google and other search engines, more than 3.2 millionย people have read the letters, an unprecedented number for the regional publication’s opinion content…

The bigger obstacles are fiscal, legal, environmentalย and most of all, political.

“The engineering is feasible. Absolutely. You couldย build a pipeline from the Mississippi or Missouri Rivers. Would itย be expensive? Yes. Do we have the political will? Absolutely not,” said Meena Westford, executive director of Colorado River resource policy for the Metropolitan Water District of Southern California.ย “I think that societally, we want to be more flexible. We want to have more sustainable infrastructure. So moving water that far away to supplement the Coloradoย River, I don’t think is viable. But it’s doable. You could do it.”

In fact, she and others noted, many such ideas have been studied since the 1940s. Most recently, in 2012, the U.S. Bureau of Reclamation produced a report laying out a potentially grim future for the Colorado River, and had experts evaluate 14 big ideas commonly touted as potential solutions. The conceptsย fell into a few large categories: pipe Mississippi or Missouri River water to the eastern sideย of the Rockies or to Lake Powell on the Arizona-Utah border, bring icebergs in bags, on container ships or via trucks to Southern California, pump water from the Columbia Riverย in the Pacific Northwest to California via a subterranean pipeline on the floor of the Pacific Ocean, or replenish the headwaters of the Green River, the main stem of the Colorado River, with water from tributaries.

Missouri River Reuse Project via The New York Times

Dry: A Weekly Western #Drought Digest โ€” August 30, 2022 — Circle of Blue

US Drought Monitor map September 1, 2022.

Click the link to read the article on the Circle of Blue website (Delaney Nelson):

The American West is experiencing its most severe drought in 1,200 years. The consequences are far-reaching and long lasting. Forests become tinder boxes. Hydropower is weakened. Human health and wildlife are threatened.ย  Each week, Circle of Blue breaks down the biggest stories, the latest data, and the most promising solutions to the United Statesโ€™ most urgent water crisis. Read Dry: A Weekly Western Drought Digest, your go-to news brief on the drying American West.

Top News

– As of August 23,ย 39 percentย of the U.S. and Puerto Rico are in drought, down fourย  percentage points in the last month. Portions of Texas and the Southwest witnessed extraordinary downpours in recent weeks that relieved some drought stress but also caused severe flooding.

– Utahโ€™s proposed Lake Powell pipelineย struggles to make progressย amid declining water levels and drought conditions.

– Data centers around the country face scrutiny for theirย substantial water use.

– California becomes first state toย install solar panels over canalsย in an effort to combat drought.

The Numbers

– A single year of drought can reduce vegetation growth by more than 80 percent, researchersย found. To gather their data, ecologists created artificial droughts at 100 research sites globally. While results of the study varied, some plots of land saw โ€œcatastrophic lossโ€ in vegetation, according toย Science Magazine.ย 

– As the fall migration season approaches, birds traveling along the Northern California mountains to Central America will face dried up wetlands and shallow water. Migratory birds will have to travel further to find smaller amounts of water, which will likely increase the spread of diseases among the birds, the Enterprise-Recordย reports. The Centers for Disease Controlย reportedย 230,900 birds are affected by the current avian flu outbreak.

– The Paluxy River in the Texas Dinosaur Valley State Park is almost completely dried up โ€“ย revealingย dinosaur tracks from 113 million years ago.ย 

Status of Reservoirs/Colorado River

– A group of seven water utilities across the Colorado River basinย pledgedย last week to reduce their water consumption and increase water reuse and recycling programs. In a letter to the Bureau of Reclamation, officials representing utilities in Colorado, California and Nevada committed to implementing indoor and outdoor water-efficient programs, reducing the quantity of non-functional turf grass and installing drought- and climate-resilient landscaping. The utilities vowed to collaborate with other users in the basin, however their conservation efforts are not likely to make a considerable dent in the riverโ€™s water scarcity crisis, KUNC Coloradoย reports.

– The declining water levels of Lake Powell, which Reclamation predicts could fall to the point of dead pool in the coming years, have had major implications for ecosystems, business owners and residents throughout the region. Without action to save the Colorado River and its reservoirs, Lake Powell is โ€œheading toward catastrophe,โ€ Zak Podmoreย writesย for the Salt Lake Tribune.

How recent legislation will help Western Slope farmers — The #Colorado Farm and Food Alliance

U.S. Capitol building. ยฉ Devan King/The Nature Conservancy

Click the link to read the guest column running on The Grand Junction Daily Sentinel website (Mark Waltermire):

Coloradoโ€™s farms are at peak production, market season is in full-swing and the seasonโ€™s bounty is being served up on tables across the state. In this hot weather, as we enjoy Coloradoโ€™s local food cornucopia, we should think of the farmers and farmworkers up early and in the fields, working to feed the nation. Farming is hard work, which many people appreciate.

The hard work of farming includes much more than just the field work. It includes building and maintaining ditches to get water to our crops and roads to get those crops to market. So when Congress passed and President Biden signed the infrastructure law this year, I saw it as a boost to my ability to turn hard work in my fields into a living that works for me.

The infrastructure act also makes progress in addressing climate change. Everyone knows drought is a real threat to agriculture, but so is heat. Heat hurts our crops, it hurts our animals and it can be deadly for those who have to work outside. Using this investment to help prepare for a climate-smart and adapted future will be good for farming, too.

Climate change is here, and farming, our food systems and the supply chain are all especially vulnerable. Unless we get ready now, the hurt will only be worse down the road, which is why another new law, the recently enacted Inflation Reduction Act (IRA), also makes good sense.

For agriculture, rural communities and conservation, the IRA is a big win for several reasons. It helps make our farms and communities more resilient. It prioritizes funding to restore and protect watershed and public land health, for instance, and to improve soil health.

The IRA also takes huge steps in reducing the nationโ€™s greenhouse gas pollution. While we need to prepare for the heating that is here and to come by adapting our systems to be more resilient (and the new law begins to do that), we really need to stop making the problem worse.

This legislation does that as well, by increasing the uptake of more renewable energy and supporting rural electric co-ops in that transition. And it accomplishes an important third component, too, just as crucial as these first two. By focusing on improving land health and conservation practices, the IRA can help us better manage carbon by encouraging practices that return and store carbon in the ground, in soils and in natural systems.

The potential here cannot be overstated for western Colorado, and rural communities in particular, should seek to actively lead in this effort to center land-use and agriculture as climate action. For example, an analysis by the Colorado Farm and Food Alliance has found that the ability to store carbon in soil on farmland just within five counties on the Western Slope could be increased by more than ten-fold by shifting to incorporate more cover-cropping.

Relatively small investments in these practices will make a real difference. Resources that help farmers strengthen their resiliency and improve techniques โ€” resources that are increased under the IRA โ€” can be a real boost. The future of farming, even our survivability in the American Southwest, means we need to get this right. Letโ€™s make sure the funding available for infrastructure and in bolstering healthy natural systems and the ecological services they provide finds its way to our farms and ranches.

By investing in rural communities through resources dedicated to restoring land, watershed, and soil health โ€” as well as supporting more home-grown renewable power โ€” we can all help in bringing real benefit to our communities as we address the climate crisis. Western Colorado can and should be a global leader in rural climate action. We should welcome and seize the opportunity the new Inflation Reduction Act brings.

Mark Waltermire owns and operates Thistle Whistle Farm outside of Hotchkiss and is active with the Valley Organic Growers Association, Colorado Farm and Food Alliance and other projects that promote secure, equitable and resilient farms and local foodย systems.

the Food grown, Beautiful, Delicious, Odd. Photo credit: Thistle Whistle Farm

#ClimateChange Is Ravaging the #ColoradoRiver. Thereโ€™s a Model to Avert the Worst — The New York Times #COriver #aridification #ActOnClimate #KeepItInTheGround

This irrigation canal helps support the Yakima Basin’s $4.5 billion agricultural industry. Photo credit: Washington Department of Ecology

Click the link to read the article on The New York Times website (Henry Fountain). Here’s an excerpt:

…a decade ago, the water managers of the Yakima Basin tried something different. Tired of spending more time in courtrooms than at conference tables, and faced with studies showing the situation would only get worse, they hashed out a plan to manage the Yakima River and its tributaries for the next 30 years to ensure a stable supply of water. The circumstances arenโ€™t completely parallel, but some experts on Western water point to the Yakima plan as a model for the kind of cooperative effort that needs to happen on the Colorado right now…

Representative Melanie Stansbury, a New Mexico Democrat who worked on the Yakima Basin and other water issues for years before being elected to Congress in 2021, said the plan โ€œrepresents the best of a collaborative, science-based process.โ€

[…]

Climate change and recurring drought had wreaked havoc with the water supply for irrigation managers and farmers in the Yakima Basin, one of the most productive agricultural regions in the country. Conservationists were concerned that habitats were drying up, threatening species. Old dams built to store water had blocked the passage of fish, all but eliminating the trout and salmon that the Indigenousย Yakama Nationย had harvested for centuries. In droughts, water allocations to many farms were cut. Years of court fights had left everyone dissatisfied, and a proposal in 2008 for a costly new dam and reservoir that favored some groups over others had not helped. Ron Van Gundy, manager of the Roza Irrigation District at the southern end of the basin, went to see Phil Rigdon, director of the Yakama Nationโ€™s natural resources division. The two had been battling for years, largely through lawyers. They both opposed the dam, but for different reasons…

The two met, and eventually other stakeholders, joined them in developing a plan for better management of the river. After several years of give-and-take, the result was the Yakima Basin Integrated Plan, a blueprint for ensuring a reliable and resilient water supply for farmers, municipalities, natural habitats and fish, even in the face of continued warming and potentially more droughts. A decade into the plan, there are tens of millions of dollarsโ€™ worth of projects up and down the river designed to achieve those goals, including canal lining and other improvements in irrigation efficiency, increasing reservoir storage, and removing barriers to fish.

Created by Imgur user Fejetlenfej , a geographer and GIS analyst with a โ€˜lifelong passion for beautiful maps,โ€™ it highlights the massive expanse of river basins across the country โ€“ in particular, those which feed the Mississippi River, in pink.

Hedging our #water bets — @BigPivots

Las Vegas Lake Mead intake schematic, courtesy SNWA.

Click the link to read the article on the Big Pivots website (Allen Best):

Las Vegas in 2007 bet on declining reservoir levels in the Colorado River. The bet is now paying off. Municipal water providers in Colorado have started tightening the spigot for landscaping. That move is also wise โ€” but overdue?

Lake Meadโ€™s receding waters have exposed sunken boats, dead bodies and more. But the wisdom of a bet placed in 2005 by Las Vegas has also been revealed.

The Southern Nevada Water Authority draws 90% of its water for a population of 2.3 million from Lake Mead. It had two intake pipes, one higher and one lower in the reservoir.  Reservoir levels have dropped precipitously since 2002 when the Colorado River delivered just 3.8 million acre-feet of flows. The 1922 compact among Colorado and the seven other basin states assumes more than 20 million in annual flows.

Las Vegas bored a third tunnel, this one coming up from the bottom of the reservoir. The far-sightedness of that and other investments totaling $1.3 billion was revealed in April when reservoir levels dipped below what was needed for the highest intake pipe. Depending upon the Colorado River, Las Vegas had wisely hedged its bet.

The front of the Steamboat Springs municipal building has been xeriscaped to consume less water. Top photo, Lake Mead floats boats below the now-infamous bathtub ring in December 2021. Photos/+Allen Best

Drought combined with the aridification produced by warming temperatures have upset the cart in the Colorado River Basin. Apples are rolling everywhere. The easy, visual way of telling that story is of the widening bathtub rings in the giant reservoirs of the Colorado River. Mead and Powell are respectively 73% and 74% empty.

But the most important story will be in how demand gets cut in Colorado and the six other basin states. The onus is on California, Arizona, and Nevada โ€”particularly California, which for years into the drought to slurp too generously given the emerging climate realities.

Colorado and other upper basin states have lived within their compact-apportioned means. But here, too, changes are underway, because the water just is not there. Farms and ranches, which still consume upward 85% of water in Colorado, will have to be part of the story. So will the still- growing towns and cities.

Changes can be seen most prominently in those places on the edge, including Denverโ€™s fast-growing suburbs of Aurora and Castle Rock. Theyโ€™re redefining acceptable landscapes in the semi-arid West. Sprawling lawns resembling those of the rain-soaked eastern states are on their way out.

In Aurora, Coloradoโ€™s third largest city at nearly 400,000 residents, the city council last week approved regulations sharply limiting turf grasses on golf courses and new homes. Residential lots will be limited to 45% or 500 square feet of the yard, whichever is less, for grass. Within that limit are other limits. No more Kentucky blue-grass. Other varieties use less water

Elected officials in Castle Rock, a city of 80,000 people that expects to fully fill out its britches at 142,000 people, in early September review similar regulations. โ€œColoradoscapeโ€ is what Castle Rock calls its recommended landscapes. For homes, 500 square feet is tiny, smaller than some bedrooms. For new yards, it will be the max. Mark Marlow, director of Castle Rock Water, says city leaders began meeting with stakeholders, including homebuilders, in November.

Marina at Lake Mead. Photo credit: Allen Best/Big Pivots

Facing โ€˜dead poolโ€™ risk, #California braces for painful #water cuts from #ColoradoRiver — The Los Angeles Times #COriver #aridification #LakeMead #LakePowell

Brad Udall: Hereโ€™s the latest version of my 4-Panel plot thru Water Year (Oct-Sep) of 2021 of the Colorado River big reservoirs, natural flows, precipitation, and temperature. Data (PRISM) goes back or 1906 (or 1935 for reservoirs.) This updates previous work with @GreatLakesPeck. https://twitter.com/bradudall/status/1449828004230664195

Click the link to read the article on The Los Angeles Times website (Ian James). Click through for the photo gallery, here’s an excerpt:

Managers of districts that rely on the Colorado River have been talking about how much water they may forgo. So far, they havenโ€™t publicly revealed how much they may commit to shore up the declining levels of Lake Mead, the nationโ€™s largest reservoir.But state and local water officials say there is widespread agreement on the need to reduce water use next year to address the shortfall. Without major reductions, the latest federal projections show growing risks of Lake Mead and Lake Powell approaching โ€œdead poolโ€ levels, where water would no longer pass downstream through the dams. Though the states havenโ€™t agreed on how to meet federal officialsโ€™ goal of drastically reducing the annual water take by 2 million to 4 million acre-feet, the looming risks of near-empty reservoirs are prompting more talks among those who lead water agencies…

Though [Tanya] Trujillo and [Camille] Touton have stressed their interest in collaborating on solutions, they have also laid out plans that could bring additional federal leverage to bear. Their plan to reexamine and possibly redefine what constitutes โ€œbeneficial useโ€ of water in the three Lower Basin states โ€” California, Arizona and Nevada โ€” could open an avenue to a critical look at how water is used in farming areas and cities. How the government might wield that authority, or tighten requirements on water use, hasnโ€™t been spelled out. The prospect of some type of federal intervention, though, has become one more factor pushing the states to deliver plans to take less from the river…

Because most water rights fall under state law, developing a new definition of โ€œbeneficialโ€ would be complicated and could lead to lawsuits, Larson said. What might qualify as โ€œwasteโ€ would also be hard to pin down, he said, because โ€œone personโ€™s waste is another personโ€™s job.โ€

[…]

Arizona and Nevada are calling for a look at โ€œwastefulโ€ water use as a way of prodding large California agencies like the Imperial Irrigation District to agree to substantial cutbacks, [Rhett] Larson said. Itโ€™s an indirect way, he said, for the two states to send a message that โ€œCalifornia, your agriculture needs to be more efficient.โ€

The latest briefing (September 2, 2022) is hot off the presses from Western #Water Assessment

Click the link to read the assessment on the Western Water Assessment website:

August brought several waves of monsoonal thunderstorm to Colorado, Utah and western Wyoming and left much of the region with above average August precipitation. Monsoonal thunderstorms triggered high flows and flash floods in many locations. On August 20th, 1-2โ€ of rain in Moab triggered a large flash flood that caused Mill Creek to crest its banks and flow down Main Street. Temperatures were near average for much of Colorado and Utah; temperatures in Wyoming, northern Colorado and northern Utah were 2-4 degrees above normal. Drought conditions improved slightly in Utah and Colorado and Utah remains the hardest hit by drought with 100% of the state in drought and 61% of the state in D3-D4 drought. La Niรฑa conditions are predicted to persist through early winter and temperatures are likely to be above average and precipitation below average for much of the region.

Much of the region received average to above-average precipitation during August. Areas that traditionally receive ample monsoonal moisture like the Colorado Rockies and eastern Utah received average to slightly above average August precipitation. Large swaths of western and northern Utah and western Wyoming received 150-400% of normal August precipitation. August is typically a very dry month in these areas, so it is important to note that much above average precipitation meant total precipitation of 1-3 inches with isolated observations of 4 inches. There were three distinct areas of below average precipitation during August: eastern Colorado and Wyoming, northeastern Utah, northwestern Colorado into central Wyoming and the Lake Powell region.

August temperatures cooled somewhat compared to record and near-record July heat. Temperatures in most of Colorado and Utah were near-normal with areas of relatively cooler temperatures in the southern parts of both states. In parts of northern Colorado and Northern Utah, temperatures were 2-4 degrees above normal. In Wyoming, August temperatures were 2-4 degrees above normal in most locations.ย 

Severalย streams and rivers in central Utah continued to report record low monthly streamflows during August. In otherย locations, monsoonal rains caused many regional rivers to rise to above or much-above normal flows for short periods. Southern Utah rivers where flash floods occurred and flows rose to at least 1,000 cubic feet per second (cfs) included the Dirty Devil, Dolores, Paria, Price, Santa Clara and San Juan Rivers. Flows in the San Juan River were much higher than normal in August, including a peak flow of 6,000 cfs. The San Juan had a paltry peak spring streamflow of around 2,000 cfs, flows followed by a low of 350 cfs in late June.

The impacts of long-term drought are evident in regional reservoir storage, especially in the Colorado River Basin. Of the Upper Colorado River basin reservoirs, Flaming Gorge (75% full) and Fontanelle (92%) have the most stored water and Lake Powell remains extremely low (26% full). Navajo (55%) and Blue Mesa (41%) are also much lower than average for this time of year. Overall reservoir storage in Utah is below average and slightly lower than last year; Utah reservoirs are currently 62% full and 82% of median reservoir levels. Reservoir storage is slightly lower in Colorado where statewide reservoir storage is 56% full and at 75% of median reservoir storage. Colorado reservoir storage is highest in the South Platte River basin and Colorado River headwaters and the lowest levels of Colorado reservoir storage are found in the Gunnison and San Juan River basins.

Overall, regional drought conditions improved somewhat during August. Drought now covers 68% of the region (down from 73% on 8/2) and 21% of the region is in extreme (D3) drought, most of which is in Utah. Drought conditions improved by one category in southern and eastern Utah during August. In Wyoming drought conditions worsened by one category in south central Wyoming and southwestern Wyoming where extreme (D3) drought emerged. While monsoonal rains did improve drought conditions during August, conditions did not improve in as widespread of an area as predicted last month.

West Drought Monitor map September 1, 2022.

La Niรฑa conditions remain in place as eastern Pacific Ocean temperatures remain consistently 0.5ยบ – 1ยบC below normal. There is a 60-85% probability of La Niรฑa conditions remaining through mid-winter. By early 2023, there is a higher probability of neutral ENSO conditions and a 20-45% chance of La Niรฑa conditions persisting. NOAA monthly climate outlooks project a 33-60% chance of above average regional temperatures and an increased probability of below average precipitation in Wyoming. The NOAA seasonal climate outlook for October-December indicates the influence of a La Niรฑa weather through early winter with an increased probability of above average temperatures across the region and an increased probability of below average precipitation for Colorado, Utah and southern Wyoming.

Significant August weather event.ย Strong monsoonal thunderstorms caused flash flooding and extensive damage in Moab, UT and a hiker fatality in Zion National Park. On August 20th, 1 to 1.75 inches of rain fell in the Mill Creek watershed southeast of Moab, UT. The ensuing flash flood tore down Mill Creek, reaching a peak flow of over 1,000 cfs upstream of Moab. Mill Creek overflowed its banks and ran down Main Street in Moab reaching depths of 2-3 feet, carrying several cars, woody debris and mud through downtownUtah Governor Spencer Cox declared a state of emergency in Moab and plans to seek aid from FEMA There was an estimated $10 million in damages from the flood.

Area newspapers widely reported the flood as a 1-in-100-year event based on precipitation recurrence interval frequencies. The flash flood was actually caused by two distinct 1-in-100-year rainfall events in the Mill Creek watershed; one event started at 5:30 pm, the second event started at 6:40 pm and both lasted just over 1 hour. The rainfall event that triggered the initial high flows of 1,000 cfs in Mill Creek was from a small area of intense precipitation that stalled over Mill Creek upstream of Moab beginning at 5:30 pm. This area of rain dumped 1.25-1.75โ€ of rain over 60-90 minutes. As Mill Creek flows were peaking at around 1,000 cfs, a second wave of precipitation arrived and dumped 1-1.5โ€ of rainfall over Mill Creek immediately upstream of Moab. Mill Creek flows in downtown Moab, downstream of the streamflow gauge, were likely much higher than 1,000 cfs; most of the second wave of precipitation fell downstream of the Mill Creek stream gauge. Rainfall from the Moab area sites reported 0.03-0.64โ€ of rain on 8/20. A potential contributor to the severity of the flood was the 2021 Pack Creek Fire which burned 8,000 acres in the upper Mill Creek watershed, however the most intense precipitation from the event did not occur over the Pack Cree Fire burn scar. The second wave of precipitation fell in an area rated as a high to very high flooding hazard according to Utah Geologic Survey maps.

The day prior to the Moab flood, August 19th, a strong thunderstorm triggered a large flash flood in the Narrows of the Virgin River in Zion National Park. The Narrows is a popular hike in the park and particularly dangerous during times of high flash flood risk. Just downstream of the Narrows, on the North Fork of Virgin River, 0.67โ€ of rain fell and the river peaked at a flow of 2,540 cfs. During the flash flood, there were several reports of hikers being swept off their feet or trapped by flood waters in the Narrows. Immediately following the flood, no hikers were unaccounted for, but by the evening of 8/19, a hiker from Tuscon, AZ was reported missing. Search efforts recovered the body of the 20-year-old woman on 8/23, approximately 6 miles downstream of the Narrows.

Aspinall Unit operations update (September 4, 2022) #GunnisonRiver #ColoradoRiver #COriver #aridification

Aspinall Unit
Click the link for a larger view.

#Durango to explore pipeline from Lake Nighthorse to Terminal Reservoir — The Durango Herald #AnimasRiver #SanJuanRiver #ColoradoRiver #COriver #aridification

Lake Nighthorse and Durango March 2016 photo via Greg Hobbs.

Click the link to read the article on the Durango Herald website (Christian Burney). Here’s an excerpt:

The proposed solution is a new water pipeline from Lake Nighthorse to Durangoโ€™s Terminal Reservoir, on College Mesa, which stores water short term until it is pumped into the cityโ€™s treatment facility and made ready for use. The pipeline would allow the city to access its share of water at Lake Nighthorse in the event its access to the Florida or Animas rivers is compromised or those waters become unavailable or unsafe for use.

City Council approved an allocation of $500,000 to the cityโ€™s water fund for a feasibility study and a preliminary design report. Justin Elkins, Durango utilities manager, said on Thursday he hopes the study will be completed by the end of the year. He said the feasibility study is intended to determine if a pipeline from Lake Nighthorse to Terminal Reservoir can be installed and, assuming it can be, what materials would be used and the size of the pipe; where it would be installed; any land-use or zoning obstacles; and how much the project would cost. The study will also examine if Durango is using its water in the most efficient way or if it will need to adapt in the future, he said…

โ€œFrom the two watersheds that we draw from โ€“ the Animas and the Florida watersheds โ€“ we do have statistically significant reduction over the past 20 water years in precipitation, in total runoff, in the watershedโ€™s ability to convert runoff,โ€ he said.

[Allison] Baker said at the City Council meeting August 2, 2022 that the downward trend started in 1980. [ed. emphasis mine]

โ€œPersonally, what I look at more than the trends โ€ฆ is that there is a lot of extreme years where we are extremely high or extremely low (in precipitation),โ€ she said.

State appeals court upholds Larimer County’s decision to deny permit for #Thornton pipeline — The #FortCollins Coloradoan

Thornton Water Project route map via ThorntonWaterProject.com

Click the link to read the article on the Fort Collins Coloradoan webslite (Bethany Osborn). Here’s an excerpt:

The Thornton pipeline continues to face obstacles after the Colorado Court of Appeals on [September 1, 2022] upheld Larimer Countyโ€™s denial of a permit that would allow the pipeline to run through private property north of Fort Collins.

The decision against the major water project for the city of Thornton comes after a long journey through Coloradoโ€™s judicial system. Larimer County commissioners originally denied Thornton a 1041 permit to construct 12 miles of a pipeline through unincorporated parts of the county in 2018 and again in 2019. Commissioners said both times that Thorntonโ€™s proposed project failed to meet several criteria required under 1041 permits…

The next step in the judicial process for Thornton could be an appeal to the Colorado Supreme Court, though project officials have not yet announced if this will be their next move.ย 

โ€œWe will take some time to analyze what the court said in the ruling and consider our next steps,โ€ Todd Barnes, Thorntonโ€™s communications director, told the Coloradoan in an email. โ€œThornton remains committed to bringing the high-quality water we own down to the people in our community.โ€

Flows in #SanJuanRiver remain above median — The #PagosaSprings Sun #ColoradoRiver #COriver #aridification

Click the link to read the article on the Pagosa Springs Sun website (Josh PIke). Here’s an excerpt:

Stream flow for the San Juan River on Aug. 31 at approximately 9 a.m. was 162 cubic feet per second (cfs), according to the U.S. Geological Service (USGS) National Water Dashboard. This is down from a nighttime peak of 195 cfs at 7:45 p.m. on Aug. 30.

The NIDIS also indicates that the levels of drought in the county have declined significantly from July and early August, with only 36.2 percent of the county being affected by drought, down 64 percent from last month, although there has been no change since last week.

Summer precipitation and percent of normal maps from the High Plains Regional Climate Center (September 3, 2022): Precipitation up and down the spine of the Southern Rockies #COwx

The #ColoradoRiverโ€™s alfalfa problem: Growing less hay is the only way to keep the river’s #water system from collapsing — @HighCountryNews #COriver #aridification

A hayfield near Grand Junction, irrigated with water from the Colorado River. Under demand management pilot programs, the state could pay irrigators to fallow fields in an effort to leave more water in the river. Photo credit: Brent Gardner-Smith/Aspen Journalism

Click the link to read the article on the High Country News website (Jonathan Thompson):

The West has an alfalfa problem.

Itโ€™s time for hay farmers to come to the Colorado River water-conservation tableย ย 

In June, Bureau of Reclamation Commissioner Camille Calimlim Touton told the Colorado River Basin states that they needed to reduce water consumption by 2-to-4 million acre-feet โ€” or as much as 30% of the seven statesโ€™ total use โ€” to save the system from collapsing. It was an enormous ask, unprecedented in scope, and probably the first time a Reclamation officialโ€™s words ever went viral.

A few weeks later, I stood on a dusty trail in Page, Arizona, looking out at Glen Canyon Dam and wondering whether such huge cuts were even possible, without, say, shutting off every irrigation canal into California. And how could the states possibly manage such a huge reduction while also fulfilling their legal obligationย to deliver an equally large amount of additional waterย to the 30 tribes in the Colorado River Basin?

Part of the answer lay right in front of me: The trail I was hiking followed the edge of the local golf course, an emerald green carpet on the parched red earth. I wondered how much water you could save by cutting off every golf course in the West. Then I started ticking off other water-saving measures

– Tear up the turf lawns;

– Shut down water-guzzling coal power plants;

– Drain private swimming pools, and ban new ones;

– Shut off those Las Vegas fountains*;

– Halt new housing growth;

– Make water recycling the norm;

– Plug the leaks in water-distribution systems;

– Ban water-guzzling data centers in arid areas;

– Structure water rates in a way that discourages waste;

And put water-flow restrictors on LA-area celebritiesโ€™ homes to keep them from wasting water.

Surely that would do it. Especially the last item, given that Kim Kardashianย was just bustedย for using 232,000 gallons more than she was supposed to โ€” and doing so in just one month. (Sylvester Stallone was equally guilty.) But when I sat down to tally up the savings all this added up to, I still came up short. Way short.

459 acre-feet
Average annual water used to irrigate a golf course in the Southwest, according to the U.S. Golf Association. (1 acre-foot = 325,851 gallons)

300
Number of golf courses in Arizona, according toย Golf Arizona.ย 

145ย million gallons
Dailyย consumptive water useย of power plants in Colorado River Basin states, which amounts to about 162,000 acre-feet per year.ย 

Now, 2 million acre-feet is a huge amount of water: enough to fill more than 1 million Olympic-size swimming pools. To get to Toutonโ€™s upper goal, youโ€™d need to drain 2.2 million monster-sized pools. Hell, you could shut off every water tap in Las Vegas, and youโ€™d still come up 2-million-swimming-poolsโ€™-worth short โ€” or about 1 trillion gallons. In fact, you could haltย allย municipal water consumption in the Colorado River Basin โ€” dry out Phoenix and Tucson lawns, deprive Los Angeles and Denver of showers and toilet flushing โ€” and it still wouldnโ€™t be quite enough.

โ€œThereโ€™s not 2 million acre-feet of municipal use within the Lower Basin (Nevada, California and Arizona) and probably just above that if you look basin-wide,โ€ said Colby Pellegrino, a deputy general manager of the Southern Nevada Water Authority in an executive roundtable in August. โ€œTo think this problem can just be solved by cities just is wrong,โ€ she continued. โ€œAgriculture has to step up to the table.โ€ย 

But I come from a long line of western Colorado farmers, and my instinctive reaction to this kind of talk is:ย Themโ€™s fighting words!ย We Upper Basin folks learn early on about โ€œfirst in time, first in right,โ€ and that if you donโ€™t put all of your allotted water on your fields, itโ€™ll run downstream to overflow Las Vegasโ€™ lavish fountains, the swimming pools of Phoenix and Hollywood celebritiesโ€™ private forests. The notion of โ€œbuying and dryingโ€ farms so the cities can keep growing is anathema.ย 

2.6 million acre-feet
Amount of Colorado River water Californiaโ€™s Imperial Irrigation District isย expected to consumeย this year, most of which goes to agriculture.ย 

244,635 acre-feet
Amount of Colorado River water Nevada is expected to consume this year. Thatโ€™s less than half the amount of water that evaporates off of Lake Mead each year.ย 

75%
Portion of Utahโ€™s Colorado River use consumed by agriculture in 2018.

But once I calmed down, I realized that Pelligrino has a point. See, if you want to cut water consumption, you have to tackle the biggest water users. And the biggest user of Colorado River water, by far, is not lawns, not Vegas golf courses (mostly irrigated by recycled wastewater), not the Bellagio fountain, not even Kardashian or Stallone. Itโ€™s agriculture, which historically has accounted for up toย 80% of all consumptive water useย in the Colorado River Basin. Not only do crops need more water than houses, but in most cases, farmers have senior rights to the bulk of the water. And of all the crops grown in the region, alfalfa and hay fields collectively are the thirstiest.ย 

Thatโ€™s not just because alfalfa uses a lot of water, though it does โ€” aboutย 1.5 million gallons per acre per year,ย rivaled only for thirstiness by almonds and pistachios. Itโ€™s also because so much of the Westโ€™s agricultural land is devoted to growing alfalfa. Colorado, Utah and Arizona farmers irrigated aboutย 4.1 million acresย of crops in 2017, and nearly half of those acres were in alfalfa. The Colorado River Basinโ€™s largest single water consumer is the Imperial Irrigation District in Southern California, which drawsย some 2.6 million acre-feetย from the river each year, nearly all of which goes to crops. About one-third of the districtโ€™s irrigated acreage is devoted to alfalfa, which annually consumes at least 400,000-acre feet of Colorado River water โ€” more than Nevadaโ€™s entire allotment.ย 

3 to 6 acre-feet
Amount of water needed annually to irrigate an acre of alfalfa. The amount is greater in hotter, drier climates.ย 

3 million
Acres of irrigated agricultural land in Western states (including the Colorado River Basin) planted with alfalfa grown for forage (hay), grazing or seed in 2022.ย 

$880 million
Value of hay shipped overseas last year from Colorado River Basin states, most of which went to China, Japan and Saudi Arabia.

If the Rocky Mountainsโ€™ winter snowpack is like a huge reservoir that feeds the Colorado River system, then the alfalfa fields stretching from western Colorado to Southern California comprise a sort of anti-reservoir, sucking up a good portion of the water in order to feed beef and dairy cattle in the U.S., China, evenย Saudi Arabia. If you were to stop filling up the alfalfa anti-reservoir, or fallow all of the alfalfa fields in the Colorado River Basin, youโ€™d come up with Toutonโ€™s desired cuts and then some fairly quickly. Itโ€™s simple math.ย 

Which is not to say doing so would be pretty, painless, politically palatable or even possible. Buying and drying up small farms en masse would threaten rural economies and cultures. Many farmers grow alfalfa or other hay as a side crop โ€” itโ€™s reliable, relatively easy to care for, provides multiple harvests during the long growing season and gains value during drought. If farmers were forced to get rid of their hay, their operations might no longer be viable, and the cost of beef and dairy products would certainly go up. Gone would be the experience of rolling down the windows on a summerโ€™s eve and inhaling the poignant aroma of a freshly cut field. Gone the bucolic sight of the long sunset shadows cast by the bales โ€” all replaced by patches of dusty, noxious-weed-breeding ground or yet more residential sprawl.

Most of us can probably agree that farms should not be dried to allow cities to grow heedlessly, or to allow urban folks to water big lawns or enable Kim Kardashian to do whatever the heck she does with all that water. In the past, Phoenixโ€™s sprawl has gobbled up citrus groves and cotton fields, and Coloradoโ€™s Front Range cities have bought and fallowed distant farms to accommodate houses and lawns. That, too, must stop. The goal here is not to transfer the water from farms to cities, but from farms and cities back to the river itself โ€” or, rather, to theย rivers, plural. The Klamath River in southern Oregon and Northern California is in crisis as well, and the Great Salt Lake is rapidly shrinking. Alfalfa fields are a primary culprit in both cases.

So, banning alfalfa is not the answer. Butย piping Mississippi River waterย over the Rockies or buildingย billion-dollar, energy-intensive desalination plantsย to enable farmers to continue dumping water on hundreds of thousands of acres of cattle fodder is simply insane. Itโ€™s time for agriculture, and especially Big Alfalfa, to step up and give up a portion of its water either by becoming more efficient, switching to less water-intensive crops or fallowing more fields. The growers will be compensated: Congress just authorized $4 billion in the Inflation Reduction Act for that very purpose.

Industrial-scale farmers are currently growing and irrigating some 85,000 acres of alfalfa in Californiaโ€™s Imperial Valley. Cover all of that land with solar panels instead, and youโ€™d save desert land from industrialization, generate enough power to replace Glen Canyon Damโ€™s hydroelectricity output several times over โ€” and maybe even stave off the Colorado Riverโ€™s collapse.ย 

Additional #water cuts could be coming to Yuma, #AZ farmers, threatening supply of leafy greens — Fresh Plaza #ColoradoRiver #COriver #aridification

A field of produce destined for grocery stores is irrigated near Yuma, Ariz., a few days before Christmas 2015. Photo/Allen Best – See more at: http://mountaintownnews.net/2016/02/09/drying-out-of-the-american-southwest/#sthash.7xXVYcLv.dpuf

Click the link to read the article on the Arizona’s Family website (Briana Whitney). Here’s an excerpt:

The water cuts made by the Bureau of Reclamation to the Colorado River that will affect Pinal County farmers will not affect Yuma farmers. Still, the bureau said there needs to be millions more cuts to the water, and Yuma farmers may take the brunt of it. The big picture problem: Yuma provides 90% of the nationโ€™s leafy greens like lettuce and spinach during the winter months, and now that could be at risk. Anybody whoโ€™s driven from the desert of the Valley to the San Diego beaches passes through the stretch of agricultural land along Interstate 8: Yuma, Arizona. โ€œIt is a climate that isnโ€™t really replicated anywhere else in the world in terms of how we can grow and how long we can grow and what we can grow,โ€ said Chelsea McGuire, Director of Government Relations with the Arizona Farm Bureau…

This month the Bureau of Reclamation announced Colorado River water cuts to farms in Arizona amid the drought. That didnโ€™t affect Yuma farms, but something else could. โ€œThatโ€™s not kind of where the bureau stopped. They said earlier before they announced the Tier 2A that weโ€™re going to need an additional 2-4 million acre feet to stay in the river to avoid a crash, a catastrophic situation,โ€ McGuire said. McGuire said the Yuma farmers came up with a plan for the Bureau of Reclamation โ€” their farmers are willing to take a one-acre foot of water less per acre. That would total about 925,000-acre-feet in water cuts, a significant chunk but well below that 2-4 million number set by the bureau.

โ€œTheyโ€™ve basically come to the determination that thatโ€™s as much as they can take and still stay in business and keep producing,โ€ McGuire said.

So, all these numbers, what does that mean for you at the grocery store? โ€œThe most basic consequence is that weโ€™re going to see significant decreases in availability and significant increases in price,โ€ McGuire said. โ€œWe can buy romaine lettuce any time of year in the stores, itโ€™s grown in different places, but we can access it. That may not be the case anymore.โ€