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Detailed Reference Information |
Baker, L.A., Qureshi, T.M. and Wyman, M.M. (1998). Sources and mobility of arsenic in the Salt River watershed, Arizona. Water Resources Research 34: doi: 10.1029/98WR00627. issn: 0043-1397. |
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Sources and mobility of arsenic in the upper Salt River (Arizona) were examined using a 6-year long mass balance for nine U.S. Geological Survey chemical monitoring stations, a more spatially intensive low-flow synoptic study, and laboratory leaching studies. An arsenic-rich lacustrine deposit (the Verde Formation) comprised only 4% of the watershed but contributed a third of the total watershed arsenic loading. Export from this part of the watershed was 10--20 times higher than export from most other parts of the watershed. Laboratory experiments confirmed the high As leaching potential for this formation. Although elevated levels of As were found in a geothermal spring and in several mine seeps, these sources of arsenic contributed little to the overall As loading. About 15% of the As loading from the upper Verde River watershed was retained by a two-reservoir system. Sedimentation and chemical precipitation appear to be likely mechanisms of As retention in the reservoirs. ¿ 1998 American Geophysical Union |
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Abstract |
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Keywords
Hydrology, Surface water quality |
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Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
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