“More than 100 years ago, the US government encouraged Americans to populate rural areas like this, build infrastructure, and farm more land, according to Sarah Porter, director of the Kyl Center for Water Policy at Arizona State University. That’s when engineers started building canals to take water from the Colorado River. At the time, the US policy was “to try to get every acre of land under the plow,” Porter said.
These canals turned the desert into a produce powerhouse. When farmlandin Iowa or Nebraska is frozen and blanketed in a thick layer of snow, it’s 70 degrees and sunny in the Imperial Valley and Yuma. As soon as there was enough water in the mix, the conditions were ideal for growing crops year-round.
oday, the Imperial Valley, Coachella Valley, and Yuma together use close to 4 million acre-feet of water per year. That’s an enormous amount, equal to roughly a third of the entire flow of the river. (An acre-foot fills one acre of land with one foot of water and is roughly what two average houses use each year.)”
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“In determining the share each basin would get, water officials ignored inconvenient science and massively overestimated the river’s average flow. Western water users each got a piece of the river, but — together with water later allocated to Mexico through a treaty — those pieces turned out to be more than what it can offer in a typical year. (The 1922 decision also failed to spell out what shares would be given to the 30 or so tribal nations in the basin.)”
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“water officials didn’t factor in the possibility of a changing climate. Decades of recent warming have been drying out the West, causing less water to flow into the river.”
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“Conserving waterobviously sounds like a great idea. The problem is that farmers in these regions are already highly efficient. Water-saving technologies are also pricey, and farmers I spoke to are concerned that any future payments won’t be enough to cover them.”
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“I’ve spent the last few weeks searching for a good solution to the crisis, an end to this story. No source I found could offer one. Any effort to restore the river will mean some people (or animals) get less water, barring several more winters like this one. And there’s no way around that, no secret technology to grow food without water. “It’s just such a complicated, ugly problem,” Schwabe said.
It’s an unsatisfying conclusion.Then again, maybe that’s what climate change creates: ugly problems where everybody loses. The best thing we can do, perhaps, is to sober up to this reality — that climate change will reshape economies and human lives — and use that knowledge to prepare.
Scientists have known for decades that the Colorado River is over-allocated and that warming is drying out the basin. Yet water regulators have failed to act in a meaningful way to rebuild Lake Powell and Lake Mead, Schwabe said. They should have started overhauling the Law of the River years ago, he said, instead of always being in “crisis mode.”
“The longer you wait to act, the more drastic your action has to be,” Schwabe said. “If we had started making these cutbacks in the ’80s and ’90s, in incremental steps, we probably wouldn’t be talking about this today. The situation is dire because we failed to act previously.””
https://www.vox.com/the-highlight/23648116/colorado-river-lake-mead-agriculture-leafy-greens