#California #water agencies strike an agreement to conserve some #ColoradoRiver supply — KUNC #COriver #aridification

Southern California water agencies have agreed on a deal to cut back on the amount of water they use for the Colorado River, some of which is used to grow crops in the Imperial Valley. Ted Wood/The Water Desk

Click the link to read the article on the KUNC website (Alex Hager). Here’s an excerpt:

Water agencies in southern California announced a new agreement to voluntarily cut back on their total water from the Colorado River use by 9%. The deal is a rare instance of collaboration between water departments representing cities and farms, and comes amid federal pressure to conserve water in the face of historic drought…California’s contribution represents the first public commitment to conserve a specific volume of water among the Colorado River’s basin states since the mid-August deadline passed…The new plan from California proposes a 400,000 acre-foot reduction in water use each year, beginning in 2023 and lasting through 2026. The agencies involved – Metropolitan Water District of Southern California, Imperial Irrigation District, Coachella Valley Water District and Palo Verde Irrigation District – said it’s an effort to help boost low levels in Lake Mead, the nation’s largest reservoir…

Map of the Salton Sea drainage area. By Shannon – Background and river course data from http://www2.demis.nl/mapserver/mapper.asp and some topography from http://seamless.usgs.gov/website/seamless/viewer.htm, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=9707481

The California agencies said they will only take voluntary cutbacks if the federal government provides “funding and commitments on the Salton Sea.” The lake is kept full by irrigation runoff from neighboring agricultural areas. As farmers conserve more water in the Imperial and Coachella valleys, the lake declines causing public health and ecological crises for that valley. Its future has been at the heart of fractious debates in California about its use of Colorado River water.

The All American Canal diverts water from the Lower Colorado River to irrigate crops in California’s Imperial Valley and supply 9 cities. Graphic credit: USGS

Click the link to read “California agencies float Colorado River water cuts proposal” on the Associated Press website (Kathleen Ronayne). Here’s an excerpt:

The agencies, which supply water to farmers and millions of people in Southern California, laid out their proposal in a letter to the U.S. Department of the Interior. It comes as drought exacerbated by climate change continues to diminish the river, and months after the U.S. Bureau of Reclamation first called on users to voluntarily limit their reliance on it. California shares the river’s water with six other states, tribes and Mexico. It has rights to the single largest share and is the last to lose water in times of shortage…California has been under pressure from other states to figure out how to use less as river reservoirs drop so low they risk losing the ability to generate hydropower and deliver water…

Four California agencies use the river’s water: The Metropolitan Water District of Southern California, the Imperial Irrigation District, the Palo Verde Irrigation District and the Coachella Valley Water District. The proposed cuts are contingent on the water agencies getting money from the $4 billion in drought relief included in the Inflation Reduction Act, as well as a commitment by the federal government to help clean up the Salton Sea, a drying lake fed by diminishing runoff from Imperial Valley farms. The letter was scant on details. The agencies said they have “a collection of proposed water conservation and water use reduction opportunities” that would help keep more water in Lake Mead, one of the river’s key reservoirs…It did not list any specific projects, or specify the rate of payment the agencies are expecting. But the federal government has previously said the $4 billion could be used for short-term conservation measures, like paying farmers to leave their fields unplanted, and long-term efficiency projects such as lining canals to prevent water loss.

The Imperial Irrigation District receives a larger share of the river than any other entity. It’s the only source of water for crops in California’s southeastern desert, where many of the nation’s winter vegetables, like broccoli, as well as feed crops like alfalfa are grown.

Colorado River Allocations: Credit: The Congressional Research Service

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