Albert Van Dijk, Australian National University
Last year, Earth experienced its hottest year on record − for the fourth year in a row. Rising temperatures are changing the way water moves around our planet, wreaking havoc on the water cycle.
The 2024 Global Water Monitor Report released today shows how these changes are driving extreme events around the world. Our international team of researchers used data from thousands of ground stations and satellites to analyse real-time information on weather and water underground, in rivers and in water bodies.
We found rainfall records are being broken with increasing regularity. For example, record-high monthly rainfall totals were achieved 27% more frequently in 2024 than at the start of this century. Record-lows were 38% more frequent.
Water-related disasters caused more than 8,700 deaths and displaced 40 million people in 2024, with associated economic losses topping US$550 billion (A$885 billion). The number and scale of extreme weather events will continue to grow, as we continue pump greenhouse gases into an already overheated atmosphere. The right time to act on climate change was about 40 years ago, but it’s not too late to make a big difference to our future.
Humanity in hot water
Warmer air can hold more moisture; that’s how your clothes dryer works. The paradoxical consequence is that this makes both droughts and floods worse.
When it doesn’t rain, the warmer and drier air dries everything out faster, deepening droughts. When it rains, the fact the atmosphere holds more moisture means that it can rain heavier and for longer, leading to more floods.
A dam upgrade left one Colorado section of the #RioGrande dry in the winter. What will it take for water to flow again? Local group says state, irrigation district failed to fulfill promises in project — The #Denver Post
Click the link to read the article on The Denver Post website (Elise Schmelzer). Here’s an excerpt:
January 5, 2025
The mighty and fabled Rio Grande dwindles to barely a trickle in the winter west of Creede, exposing nearly a mile of rocky riverbed to dry under the weak sun. This section of the river near its headwaters wasn’t supposed to be left dry in the winter, according to environmental groups. A rehabilitation project on the dam that creates the Rio Grande Reservoir was billed as an upgrade that would make the river healthier and improve recreation throughout the year. But even four years after the construction project concluded, those promises haven’t materialized. That’s because the dam’s new valves cannot safely release water during the winter, according to the Committee for a Healthy Rio Grande, a group formed to push for more water releases from the reservoir for fishing, rafting and environmental health. The irrigation district that operates the dam closes the valves from November through March. The lack of water in the winter kills off aquatic insects and vegetation — the base of the river ecosystem’s food cycle…
A solution may be in the works. After four years, the San Luis Valley Irrigation District — which owns and operates the reservoir — on Dec. 1 applied for state grant money to study how the dam’s valves could be modified to work in the winter, said Cole Bedford, the chief operating officer of the Colorado Water Conservation Board
“We are developing a solution that will safely provide low-flow releases during the winter,” San Luis Valley Irrigation District Superintendent Rob Phillips said in an emailed statement. “And, we look forward to continuing our work with those water users and organizations in the San Luis Valley who have a unique and valued history of working together to find constructive solutions.”
The issue is part of a larger challenge: How should Colorado balance the different uses of its water as climate change shrinks supplies and adds volatility to decades-old climate patterns?
Summit County currently has one of the highest snowpack medians in the state — The Summit Daily #snowpack
Click the link to read the article on the Summit Daily website (Kit Geary). Here’s an excerpt:
January 5, 2025
Summit and Eagle counties are poised to get a consistent dusting of powder nearly everyday this week heading into next weekend, according to National Weather Service meteorologists. Meteorologist Zach Hiris said there will be a “fairly active pattern across the mountains” on Monday, Jan. 6, and Tuesday, Jan. 7, which is likely bring a few inches of snow to the slopes. He said “a bunch of weak systems” could follow from Wednesday through Saturday and these are slated to bring a couple more inches. Summit’s mountains are anticipated see anywhere from 3-6 inches and its valley areas could see 1-3 inches of snow by Wednesday morning, Hiris said. Wednesday, Thursday and Friday could bring an inch or two each, but it will be more sporadic than the snowfall delivered by Monday and Tuesday’s storms, he said.
Hiris said the Blue River Basin is currently at 129% of its snowpack median.
According to the United States Department of Agriculture, the Colorado Headwaters river basin is currently at 104% of its median snowpack, the Eagle area is at 113% of its median snowpack and the Roaring Fork area is at 109% of its median snowpack.