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What is the Drought’s Effect on Western U.S. Water Resources?

/in , , /by /Water & Wastes Digestby Emily Newton

Droughts in the Western U.S. make headlines worldwide, posing particular challenges for people living and working in the affected regions. Here’s a close examination of the effects of drought on available water resources.

The Effects of California Drought Vary by Location

People regularly discuss California when talking about long-term drought, particularly because the state often experiences prolonged water shortages. Some experts believe that rather than going through brief non-drought periods, the state is actually enduring a so-called emerging megadrought and has been for the last two decades.

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Megadrought Spurs First-Ever Federal Colorado River Cutbacks

/in , , /by /E & E Newsby Jeremy P. Jacobs

The Biden administration today will declare a water shortage on the Colorado River for the first time ever, triggering cutbacks in the Southwest due to a decadeslong drought that experts say is a sign of what’s to come.

Bureau of Reclamation officials will announce that water levels in the river’s main reservoirs have dropped so low they have triggered mandatory delivery reductions in Arizona and Nevada.

The announcement comes as heat waves and wildfires are scorching the West, presenting the Biden administration with another crisis. A 20-year “megadrought” in the seven-state Colorado River Basin has caused Lake Mead and Lake Powell to drop to levels not seen since they were originally filled a half-century ago.

“This drought has come on faster and harder than last time,” said Ellen Hanak, the director of the water policy center at the Public Policy Institute of California, referring to the last Golden State drought that ended in 2016. “We are in year two, but we’re in as bad a shape as year three of what was a record drought last time.”

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Megadrought Poses ‘Existential’ Crisis in California and the West

/in , , /by /CBS SF Bay Areaby Ben Tracy and John Goodwin

The American West was once seen as a place of endless possibilities: grand vistas, bountiful resources and cities that somehow grew out of deserts. Now, manifest destiny has become a manifest emergency.

A scorching drought made worse by climate change is draining reservoirs at an alarming pace, fueling massive wildfires and deadly heat waves and withering one of the most important agricultural economies in the country.

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Amid a Megadrought, Federal Water Shortage Limits Loom for the Colorado River

/in , , /by /NPR

The Colorado River is tapped out.

Another dry year has left the watershed that supplies 40 million people in the Southwest parched. A prolonged 21-year warming and drying trend is pushing the nation’s two largest reservoirs to record lows. For the first time, a shortage is expected to be declared by the federal government this summer.

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Opinion: San Diegans Don’t Face the Water Woes Seen in Much of the State. But Conserve Anyways

/in , , /by /The San Diego Union-Tribuneby The San Diego Union-Tribune Editorial Board Mentioned: San Diego County Water Authority

Gov. Gavin Newsom’s call for all Californians to reduce their water use by 15 percent amid a severe drought across most of the state won’t be met with the same urgency in San Diego County as elsewhere because of a decades-old effort to diversify water supplies here and because of a new court order.

Last month, the U.S. Supreme Court unanimously declined a legal challenge by Imperial Valley farmers that had the potential to threaten the San Diego County Water Authority’s access to Colorado River supplies. This is why San Diego County is being asked to conserve but is not one of 50 counties in the state subject to Newsom’s stricter drought decrees.

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Opinion: California Isn’t Running Out of Water; it’s Running Out of Cheap Water

/in , , /by /California WaterBlogby Wyatt Arnold

A California water myth which becomes especially pernicious in droughts is that California is “running out of water” (Hanak et al. 2009). Viewing California’s supply and demand pressures in terms of fixed water requirements perpetuates this myth and invariably places undue attention on building additional supply infrastructure. Instead, managing water as a scarce resource suggests a balanced portfolio of water trading, investments in conveyance, smart groundwater replenishment, and demand management. With such a balanced portfolio, 1) California’s water supply situation is not broadly dire, and 2) California’s vast and interconnected water infrastructure and groundwater resources can minimize most problems from the state’s highly variable climate.

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Scientists Said the West Was Entering a Megadrought. Now It’s Twice as Bad

/in , , /by /Forbesby Eric Mack

Lake Powell is within just a few feet of its low level ever observed since it was first filled. Early season fires have already torched over 400,000 acres in Colorado and California’s reservoirs are 50 percent lower than they should be at this time of year before summer has even officially begun.

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This Stunning Timelapse Shows the Megadrought’s Toll on the West’s Largest Reservoir

/in , , /by /VoxMedia by Lili Pike

Just how bad is the drought in the Western US? The shrinking of Lake Mead, the country’s largest reservoir, is a troubling indicator.

The massive man-made lake, which straddles the border of Arizona and Nevada, is now only at 39% of its full capacity, down from 44% in April 2020. That’s equivalent to a 10-foot drop in the water level, according to the latest data from the Bureau of Reclamation. Which means mandatory restrictions on the amount of water surrounding states draw from Lake Mead could be triggered in the next few months.

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Is California Suffering a Decades-Long Megadrought?

/in , , /by /Los Angeles Times by Alex Wigglesworth

California has entered another drought.

But depending on who you ask, the last one may have never really ended.

Some researchers believe the region is actually more than two decades into an emerging “megadrought” — a hydrological event that is on par with the worst dry spells of the past millennium. Except this time, they say, human-caused climate change is driving its severity — and will make it that much harder to climb back out of.

 

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Western U.S. May Be Entering its Most Severe Drought in Modern History

/in , , /by /CBS Newsby Jeff Berardelli

Extreme drought across the Western U.S. has become as reliable as a summer afternoon thunderstorm in Florida. And news headlines about drought in the West can seem a bit like a broken record, with some scientists saying the region is on the precipice of permanent drought.

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