Evaluation of potential impacts of perchlorate in the Colorado River on the Salton Sea,California |
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Authors: | G Chris Holdren Kevin Kelly Paul Weghorst |
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Institution: | (1) Bureau of Reclamation, P.O. Box 25007 (86-68220), Denver, CO 80225, USA |
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Abstract: | Ammonium perchlorate, a component of rocket fuel, entered Lake Mead through drainage and shallow groundwater in the Las Vegas
Valley, Nevada, and is now found in the lower Colorado River from Lake Mead to the international boundary with Mexico. Perchlorate
is a threat to human health through reduction of thyroid hormone production. Perchlorate has been found in water throughout
the lower Colorado system and in crops in the California’s Imperial Valley, as well as in several other states, but it has
not previously been included in investigations of the Salton Sea. Because perchlorate behaves conservatively in the Colorado
River, it was postulated that it could be accumulating at high levels along with other salts in the Salton Sea. Results show
that perchlorate is not accumulating in the Sea, although it is present in tributaries to the Sea at levels similar to those
found in the Colorado River. Bacterial reduction of perchlorate is the most likely explanation for the observed results.
The U.S. Government’s right to retain a non-exclusive, royalty-free license in and to any copyright is acknowledged.
Guest editor: S. H. Hurlbert
The Salton Sea Centennial Symposium. Proceedings of a Symposium Celebrating a Century of Symbiosis Among Agriculture, Wildlife
and People, 1905–2005, held in San Diego, California, USA, March 2005 |
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Keywords: | Saline lakes Lake Mead Water supply Bacterial reduction Alamo River New River Whitewater River |
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