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Beneficial uses of treated drainage water




Pérez-Buenafuente, A., author
Rodrigo, J., author
Machín-Barroso, N., author
López-Manzanares, F., author
Hernández-Abreu, J. M., author
González-Hernández, J. F., author
U.S. Committee on Irrigation and Drainage, publisher

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The United States Bureau of Reclamation has a legal requirement to provide drainage services to the San Luis Unit of the Central Valley Project (CVP) in Southern California. A number of options are being investigated by Reclamation, but the current favored option includes a number of approaches to water reduction and treatment, including a spiral reverse osmosis plant. A different membrane system to recover higher proportions of saline drainage water, containing saturated levels of calcium sulfate, was tested in early 2004 at a drainage collection point in Panoche Water District. Results from that work suggest it may be possible to recover over 90% of saline drainage water for unrestricted reuse as fresh irrigation water at a cost less than or equal to the cost of producing sea water by reverse osmosis. If the equivalent amount of CVP water could be sold to urban areas at a price close to the cost of treating Sea Water by Reverse Osmosis this approach could provide an environmentally friendly and negligible cost solution to the problem of drainage water in the San Luis Unit.


Presented during the USCID water management conference held on October 13-16, 2004 in Salt Lake City, Utah. The theme of the conference was "Water rights and related water supply issues."

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