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<br />14 <br /> <br />15 <br /> <br />16 <br /> <br />17 <br />18 <br /> <br />19 <br /> <br />20 <br /> <br />21 <br /> <br />22 <br /> <br />23 <br />24 <br /> <br />00 <br />l:'- <br />...:.; <br /> <br />..-.4 <br /> <br />~, <br />c.:;,l return flow to the Colorado River is translated into an <br /> <br />2 expected reduction in salt loading. <br /> <br />3 USDA activities also included a determination of the contribution of <br /> <br />4 salt, sediment, and water into and through the irrigated area from <br /> <br />5 the upland watershed (diffuse area). <br /> <br />6 The purpose of this report is to present an analysis of the current <br /> <br />7 . irrigation systems and practices in the Grand Valley and an evaluation <br /> <br />8 of the measures for improving systems and management to increase irrigation <br /> <br />9 efficiencies. Also presented is the analysis and evaluation of the <br /> <br />10 potential to improve upland watershed condition. The report discusses <br /> <br />I I <br /> <br />the technical, economic, environmental, and social factors involved in <br /> <br />12 <br /> <br />making improvements to reduce the associated salt load pickup. <br /> <br />13 <br /> <br />COORDINATION <br /> <br />Coordination of USDA activities with state and federal agencies was <br /> <br />accompl ished through the Grand Valley Sal inity Coordinating Committee. <br /> <br />This committee has members from the following agencies and organizations: <br /> <br />Bureau of Reclamation, U. S. Geological Survey (Water Resources Division), <br /> <br />Environmental Protection Agency, Bureau of Land Management, Colorado <br /> <br />State University, Soil Conservation Service, Agricultural Research <br /> <br />Service, Colorado Water Conservation Board, Grand Valley Irrigation <br /> <br />Company, Grand Junction Drainage District, Colorado River Water Conser- <br /> <br />vation District, Grand junction Chamber of Commerce, Grand Valley <br /> <br />Project, Mesa County Soil Conservation District, and Grand Valley <br /> <br />Irrigation Association. <br /> <br />10 <br />