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0 <br />0 <br />1. To evaluate the dynamics of sediment movement in the Yampa and Green <br />Rivers by conducting and analyzing sediment load, including suspended <br />sediment and bed load, and bed material samples at key points along the <br />system. - <br />2. To evaluate the effects of the flows and sediment movement on the <br />morphometric and bed material characteristics of the Green River by <br />conduction repeat cross sections surveys at several key points along the <br />system. <br />C. End Products: <br />An annual report compiling the sediment and morphometric information and <br />containing an evaluation that can be used to assist with management decision <br />associated with flow releases from Flaming Gorge Dam, and other upstream water <br />development and land use issues. After the first 3 years of the program, the data <br />and a detailed evaluation of the results should be formally published to insure that <br />the information is readily available to resource managers, decision makers, and <br />scientists with an interest in the Yampa and Green River system. A USGS Water - <br />Resource Investigations Report may be an appropriate forum for such a publication. <br />V. Study Area: <br />Yampa River and Green River Basins. <br />VI. Study Method /Approach: <br />The project objectives will be met by performing suspended- sediment and bed -load <br />measurements, bed material sampling, and cross - section surveys at several strategically <br />selected locations along the Yampa and Green River systems. The sampling and survey <br />locations are described in the following section, and have been selected to take maximum <br />advantage of historic and ongoing data collection efforts and to provide data locations that <br />are believed to be important to the habitat requirements of the endangered fishes. The <br />sediment sampling and cross section surveys will be conducted by experienced personnel <br />using standard U.S. Geological Survey techniques. <br />VII. k Description and Schedule: <br />i <br />I A. An ongoing bed -load and bed - material sampling program will be established at the <br />Deedodge Park gage on the Yampa River, to supplement the already established <br />program of suspended sediment measurements that is being conducted by the U.S. <br />Geological Survey, in cooperation with the Recovery Program and Colorado River <br />Water Conservation District. Nine (9) samples of each parameter will be collected <br />per year. <br />ll B. An ongoing suspended- sediment and bed -load measuring program and bed - material <br />sampling program will be established at an appropriate site on the Yampa River <br />between the little Snake River confluence and the mouth of Cross Mountain Canyon. <br />These parameters will also be sampled nine (9) times per year. <br />C. An ongoing sediment -load measuring program, including both suspended- and bed - <br />load, and a bed - material sampling program will be re- established at the Jensen gage <br />on the Green River. Twenty (20) samples of each parameter will be collected per <br />4 <br />