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Rising Temperatures are Taking a Worsening Toll on the Colorado River, Study Finds

/in , , /by /azcentral.by Ian James

Scientists have documented how climate change is sapping the Colorado River, and new research shows the river is so sensitive to warming that it could lose about one-fourth of its flow by 2050 as temperatures continue to climb. Scientists with the U.S. Geological Survey found that the loss of snowpack due to higher temperatures plays a major role in driving the trend of the river’s dwindling flow. They estimated that warmer temperatures were behind about half of the 16% decline in the river’s flow during the stretch of drought years from 2000-2017, a drop that has forced Western states to adopt plans to boost the Colorado’s water-starved reservoirs.

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To Bridge the Cultures of Mexico’s Border Region and a Neglected Colorado Neighborhood, Just Add Water

/in , , /by /Colorado Sun (Denver, Colo.)by Sharon Udasin

San Luis Rio Colorado, Mexico — Under the red girders of a nondescript toll bridge, waves gently lapped coarse sands in a gritty corner of this northwestern Mexican border city.

“There is usually no water and vegetation, and the ground looks like this,” local conservationist Alejandra Calvo-Fonesca said, gesturing toward the dusty shoreline of the Colorado River.

For a few months this winter, residents welcomed an unexpected surge of water in the river – a phenomenon they had not experienced since the spring 2014 “pulse flow,” when the United States released 107,000 acre-feet of water into the Colorado River Delta over a two-month period. That seminal event brought revelers in droves, eager to celebrate the revival of a historic waterway that is not only the city’s namesake, but a source of pride for its people.

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Opinion: Trump Wading into California’s Water Policy With Phony Answer

/in , /by /San Francisco Chronicleby Chronicle Editorial Board

President Trump believes he “got it done” in fixing California’s troubled and contentious water system. What he actually produced is another wrecking-ball delay and a lawsuit to try to halt his lopsided solution.

The president found a dirt-dry corner of the Central Valley to sign documents that bless more pumping of Sacramento-San Joaquin River Delta water southward to farms and water agencies. His blessing at a campaign-style gathering in Bakersfield won’t immediately rev up water shipments, but it should underline how divisive and intractable he’s making a long-standing problem.

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California Sues Trump Administration to Block Water Rules

/in , , /by /The Associated Pressby Adam Beam

SACRAMENTO, Calif. (AP) — California sued the Trump administration on Thursday to block new rules that would let farmers take more water from the state’s largest river systems, arguing it would push endangered populations of delta smelt, chinook salmon and steelhead trout to extinction.

The federal rules govern how much water can be pumped out of the watersheds of the Sacramento and San Joaquin rivers, which flow from the Sierra Nevada mountains to the San Francisco Bay and provide the state with much of its water for a bustling agriculture industry that supplies two-thirds of the country’s fruits and nuts and more than a third of its vegetables.

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EPA Closer to Regulating PFAS in Drinking Water

/in , , /by /Bloomberg Environmentby Amena H. Saiyid

The EPA has made an initial determination that it will eventually set legal limits for levels of two key PFAS chemicals in drinking water, the agency announced Thursday.

Under the Safe Drinking Water Act, the “preliminary regulatory determination” announced Thursday is the last step before the Environmental Protection Agency proposes limits on the releases of the two chemicals in drinking water and groundwater supplies. That announcement could still be months away.

The chemicals at issue are perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS), two of many within the class of chemicals called PFAS, or per- and polyfluoroalkyl substances. Scientists have linked PFAS chemicals—common in nonstick coatings and firefighting foam—to health problems including higher cholesterol, birth defects, and cancer.

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California Sues Trump Administration Again — This Time Over Water

/in , , /by /San Francisco Chronicleby Kurtis Alexander

A day after President Trump visited the Central Valley to celebrate a boost in water for California farms, state officials sued to block the additional water deliveries.

Attorney General Xavier Becerra, in a lawsuit filed Thursday, maintains that new federal rules designed to increase pumping from the Sacramento San Joaquin River Delta fail to protect salmon and other endangered fish in the delta estuary.

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SoCal Water Managers Want to Know Who – Exactly – is Sinking the California Aqueduct

/in , /by /SJV Water (San Joaquin Valley, Calif.)by Lois Henry

A state report released in December pinned blame for sinking along the California Aqueduct on excessive nearby groundwater pumping to irrigate vineyards and nut orchards.

That was a pretty pointed finger, but not pointed enough for some committee directors in the large and powerful Metropolitan Water District of Southern California.

They wanted names.

The issue came up at a meeting of MWD’s Water Planning and Stewardship Committee on Feb. 10 where a presentation was given about subsidence along the Aqueduct. Ted Craddock, acting Deputy Director of the Department of Water Resources gave the presentation and answered questions.

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Climate Change Has Stolen More Than a Billion Tons of Water From the West’s Most Vital River

/in , , /by /Washington Postby Juliet Eilperin

The Colorado River’s average annual flow has declined by nearly 20 percent compared to the last century, and now a new study has identified one of the main culprits: Climate change is causing mountain snowpack to disappear, leading to increased evaporation.

Four recent studies have found that up to half of the drop in the Colorado’s average annual flow since 2000 has been driven by warmer temperatures. Now, two U.S. Geological Survey researchers have concluded that much of this climate-induced decline — amounting to 1.5 billion tons of missing water, equal to the annual water consumption of 10 million Americans — comes from the fact that the region’s snowpack is shrinking and melting earlier. Having less snow to reflect heat from the sun, known as the albedo effect, creates a feedback loop, they say.

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Water Board OKs $3.2M Live Oak Water Plant Land Purchase

/in , /by / Santa Cruz Sentinelby Jessica A. York

CAPITOLA — A planned water recycling plant project took a leap forward this week after approval of a new land purchase.

The Soquel Creek Water District board voted unanimously Tuesday night to exercise its $3.2 million option to purchase nearly 2 acres of Live Oak light industrial property at the corner of Chanticleer and Soquel drives. The site at 2505 Chanticleer Ave. will be the future home of an advanced purification water plant, which the district’s dubs its Pure Water Soquel project.

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Trump Brings More Water — and Himself — to Central Valley Farmers

/in , /by /San Francisco Chronicleby Peter Fimrite

BAKERSFIELD — President Trump swooped into California farm country Wednesday and, with a flourish, signed off on a plan that would take water away from fish and ship more to farmers in the Central Valley.

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