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<br />. <br /> <br />. <br /> <br />6,st, J 9 8'-1 <br /> <br />WATER RESOURCES DIVISION <br />COLORADO DISTRICT <br /> <br />...... <br />-.J <br />.c.. <br />N <br /> <br />PROGRESS REPORT <br />Dissolved Solids Loads in the Upper Colorado River Basin <br />Cooperative Study between U.S,G.S. and U.S.B.R. <br />James E. Kircher, Project Chief <br /> <br />A. <br /> <br />TITLE: <br /> <br />Dissolved solids in the Upper Colorado River basin. <br /> <br />B. LOCATION: <br /> <br />Upper Colorado River basin. <br /> <br />C. OBJECTIVES: <br /> <br />1. Determine monthly and annual dissolved solids and constituent <br />loads and concentrations at all stations with sufficient <br />WATSTORE record. <br /> <br />2. Determine trends in flow, dissolved solids concentrations, <br />dissolved solids load, flow adjusted concentrations, and all <br />major constituents. <br /> <br />3. Determine source areas of dissolved solids. <br /> <br />4. Determine cause of trends found in the Upper Colorado River <br />basin. <br /> <br />5. Develop a method for determining "natural" salt load at the <br />CRSS stations in the Upper Colorado River basin ~nd estimate <br />monthly natural salt loads for those stations. <br /> <br />6. Utilize record extension techniques to estimate complete <br />monthly and annual dissolved solids loads for 1941-83 at 12 of <br />the 20 (CRSS) stations in the Colorado River Basin. <br /> <br />D. PROGRESS AND RESULTS: <br /> <br />1. All data needed for the 6 objectives has been collated from <br />WATSTORE, USBR, and other data bases. <br /> <br />2. The first draft of "History of streamflow, water use, and <br />dissolved solids in the Upper Colorado River basin" will be <br />completed by December 1, 1985. This report covers objectives <br />1-4, and provides much of the input data for 5 and 6. <br /> <br />3. An outline has been completed for the report covering objective <br />#5 with work progressing. Planned completion of first draft of <br />the report is February, 1985. <br /> <br /><i <br />~f <br /> <br />j <br /> <br />'. <br /> <br />:",~ ",,;", -'- <br /> <br />~. --~,,:;;>;~~, <br /> <br />f <br />-, -.1 <br />~ <br />"<"- . <br />-~. <br />