California wetting up, Colorado Basin will have to wait

My California water friends are breathing a tiny bit easier, as an El Niño-fueled jet stream queues up a series of storms for the parched state. But the latest forecast models suggest the Colorado River Basin is going to have to wait its turn. The invaluable Daniel Swain wrote a couple of days ago about …

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2015 puts Sierra Nevada-Colorado Basin linkage in stark relief

If you care about Colorado River Basin water, it behooves you to pay attention to the snowpack in California’s Sierra Nevada. It’s an entirely different watershed, but 2015 demonstrated how the interconnections in California’s plumbing have left the two inextricably linked. The tl;dr version of two interrelated points below: California’s drought has put pressure on the Colorado …

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Sierra Madre, CA, introduces Colorado River water, winds up with “the Tucson problem”

Water is just water, right? What happened when Sierra Madre, a suburb northeast of Los Angeles, switched from local groundwater to imported Colorado River water is a reminder that, well, no: In 2013, Sierra Madre was forced to begin importing water from the Metropolitan Water District. That led to a new problem. The water source …

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“More Slices Than Pie: Structural Deficit on the Colorado”

I’m not sure who came up with the “More Slices than Pie” title for the panel discussion I moderated Thursday at the annual meeting of the Colorado River Water Users Association, but it had a nice ring. A big thanks to Tom McCann from the Central Arizona Project for putting the panel together and inviting …

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New paper clarifies what satellite data is telling us about Colorado River Basin groundwater pumping

A paper out yesterday adds new detail to the picture provided by satellite groundwater observations of the Colorado River Basin, arguing that groundwater depletions from human pumping are not as large as suggested by previous research. The paper, Hydrologic implications of GRACE satellite data in the Colorado River Basin published in Water Resources Research (behind paywall, sorry), …

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Is the Colorado River Basin half empty, or half full?

Preparing to moderate a panel at next week’s Colorado River Water Users Association annual meeting, I’m struck by the mix of good news and bad news on the river. 2015 water use across some major user groups is at record lows for the modern era, something that I don’t think gets enough attention. But Lake …

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The decline of Arizona cotton

Arizona cotton acreage this year is the lowest it has been in nearly a century. Cotton is incredibly important in the evolution of western water policy, in Arizona in particular and therefore in the Colorado River Basin in general. In Arizona, it was one of the “Three C’s” that dominated the state’s economy – cattle, …

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On this date in water history: Arizona governor, state senator, fisticuffs over the Colorado River

87 years ago today in Colorado River water management history, water apparently was for fightin’ over:   POLICE CALLED TO STOP BATTLE IN STATE HOUSE Affair Outcome of Argument Between Governor and Senator on River LIVELY MELEE HAS MANY PARTICIPANTS Gov. Hunt Declares Blow Received from Opponent Was “Purely Accidental” PHOENIX, Ariz., Nov. 26 – …

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