Tough to be a fish in the Colorado River

As Lake Powell drops, a waterfall forms at the reservoir’s upper end as the San Juan cuts down through sediments dropped when the reservoir was fuller. The resulting waterfall is a bit of an obstacle to fish: The razorback sucker population estimate for 2017 alone was 755 individuals and, relative to recent population estimates ranging …

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Draining the reservoirs on New Mexico’s Rio Grande

tl;dr Total reservoir storage on the Rio Grande in New Mexico at the end of August was the lowest it’s been since at least 1980. longer (with graphs!) In our University of New Mexico Water Resources Program class, we’ve been discussing the state of the Rio Grande in real time. This feels like a remarkable …

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For not fighting over

Wolf and his colleagues combed through thousands of newspaper clippings and historical accounts of anything having to do with water at international borders. He ranked every event on a scale of -7 to +7, with numbers below zero indicating worsening degrees of conflict, and numbers above zero pointing to increasing degrees of collaboration. “It turns …

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Colorado River shortage looming because Lower Basin is using too much water

tl;dr The Lower Colorado River Basin has gotten 10 million acre feet of “bonus water” since 2000, above and beyond its entitlement under the Colorado River Compact. But we’re about to have a formal shortage declaration because the Lower Basin keeps using more water than it perhaps ought to. (bad words in earlier draft deleted) …

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