Areal distribution of selenium and other inorganic constituents in shallow ground water of the San Luis Drain service area, San Joaquin Valley, California: A preliminary study

TL;DRAbstract

This report has been prepared in response to a public need for information on the quality of agricultural drainage water from the San Luis Drain service area.Discussions and data in this report are the result of a preliminary reconnaissance study designed to provide information necessary to plan and implement further scientific investigations.These investigations are needed to provide the basis for management of agricultural drainage water in the service area.The U.S. Geological Survey and other agencies, including the U.S. Bureau of Reclamation and the U.S. Fish and Wildlife Service, recognize that selenium has been implicated as the constituent of primary environmental concern in the service area, but also recognize that to focus on this one constituent may lead to incomplete results.Each study undertaken, including the one reported here, is designed to evaluate a broad spectrum of constituents that will fully address the issue of drainage-water quality.Previous water-quality data fr

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