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Science 4 November 2005:
Vol. 310. no. 5749, p. 759
DOI: 10.1126/science.310.5749.759b
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ScienceScope

The U.S. Geological Survey and its partners that care for the Grand Canyon are planning to flood the canyon for the third time in 10 years to preserve sandbars along the Colorado River and study the river. Over the years, the Glen Canyon Dam has trapped sediment and altered water flow, changing the river environment. As a follow-up to previous dam releases, hydrologists will lower the flow later this year and then increase it in early spring to push sand into sandbars throughout the canyon. Previous releases have not spread sand as uniformly as officials wanted.




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Science. ISSN 0036-8075 (print), 1095-9203 (online)