FILE - In this Wednesday, March 5, 2008 file photo, water levels at the Colorado River's Horseshoe Bend begin to rise along the beaches just hours after the Glen Canyon Dam jet tubes began releasing water, in Page, Ariz. Drought, climate change and an increasing population in the West are pushing the Colorado River basin toward deep trouble in the coming decades, scientists say. (AP Photo/Matt York)

Associated Press
FILE - In this Wednesday, March 5, 2008 file photo, water levels at the Colorado River's Horseshoe Bend begin to rise along the beaches just hours after the Glen Canyon Dam jet tubes began releasing water, in Page, Ariz. Drought, climate change and an increasing population in the West are pushing the Colorado River basin toward deep trouble in the coming decades, scientists say. (AP Photo/Matt York)
Groundwater losses from the Colorado River basin, shown in this 2008 file photo,  appear massive enough to challenge long-term water supplies for the seven states and parts of Mexico that it serves, according to a new study released Thursday, July 26, 2014, that used NASA satellites. (AP Photo/Matt York)
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