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DAM-L Pacific Institute Report examines Water Flow to Colorado R. delta area

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From: JIWLP <jwilp@pacbell.net>
Subject: New Pacific Institute Report Examines Water Flow in Colorado River Delta Region

The Pacific Institute for Studies in Development, Environment, and Security is pleased to announce the release of Missing Water:  The Uses and Flows of Water in the Colorado River Delta Region.  

This new study describes the fate of the millions of acre-feet of water diverted from the Colorado River at and below Imperial Dam, and the total inflows to and outflows from the Colorado River delta region more generally.  

This study uses the classic hydrologic boundaries of the delta region described by Godfrey Sykes in 1937, encompassing some 3,325 square miles (8,611 km2) in the states of Arizona, Baja California, California, and Sonora, including the Imperial, Mexicali, and San Luis valleys, Yuma Project lands, and the lower Coachella Valley.  The study period examines the flows and uses of water in the years 1991-1998, divided into Flood and Non-Flood years to reflect the tremendous variability of mainstem Colorado River flows.

Missing Water compiles flow data along the mainstem and along diversions within the delta region, the first time such data has been compiled for the region as a whole.  The study also reports consumptive uses of water in the agricultural and urban sectors, and estimates such use by the environment.  Agricultural use is also reported for the major crops in the region, both by acreage and by water use.

Missing Water may be downloaded from the Pacific Institute website at:

http://www.pacinst.org/missing_water.htm

Hard copies of the report may be purchased by sending a check or money order for $10 ($8 for academics and non-profits) payable to the Pacific Institute. Please send to:

Pacific Institute - Missing Water
654 13th Street
Oakland CA 94612 

A Spanish-language version will be available shortly.

Also available online is:

MJ Cohen, C Henges-Jeck, and G Castillo-Moreno. 2001. A preliminary water balance for the Colorado River delta, 1992-1998.  Journal of Arid Environments 49:35-48.

This article provides a more detailed analysis of the flows of water within the remnant portion of the delta in Mexico.  

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