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<br />.. <br /> <br />w <br />o <br />to? <br />1:",) <br /> <br />The $tudy team should .include a Geologist versed in <br />sedimentation study procedures (specifically PSIAC), a Range <br />conservationist versed in erosion and hydrologic cover <br />identification, a Hydrologist and one- fourth a staff year of Soil <br />scientist support. various other disciplines with knowledge of <br />local resource would be utilized as needed. <br /> <br />The s~udy would concentrate on only those acreages where there <br />are salt l.den. sediments or rocks and where the precipitation Is '. <br />greater th1in 10 inches per year. The precipitation limit is <br />important because below a 10 inch annual precipitation limit there. <br />is a considerably reduced chance for success of soil erosion <br />treatment ~easures. <br /> <br />The first three months of the proposed one year study will be <br />to characte,rize each of the watersheds within Utah's portion of the <br />Colorado River. Basin based on the following criteria: <br />1 - Precipitation, . <br />2 - Geomprphology, <br />3 - General soils, <br />4 - Sediment yield, and <br />5 - PQtentialfor treatment. <br />The waterslieds will be rated and ranked accordingly. <br /> <br />The remainder of the . study period will be to utilize the PSIAC <br />Sediment Yield Model on the identified priority watersheds (8 .to <br />12) to quantify and qualify specific source areas within the <br />watersheds ,on a priority basis. . The PSIAC Modeling process can <br />provide the following data: . <br />Severely eroding acres and location * <br />Tons/acre average sediment yield rate * <br />Total sediment yield in tons <br />Total ;salt yield in tons * . <br />Sediment delivered to the Colorado River System * <br />Salt ~elivered to- the Colorado River System * <br />Treat~ent alternatives <br />Reconmlended treatmellt . . <br />Estimated cost and benefit of treatment <br /> <br /> <br />'" <br />. 1 <br /> <br />* This data is provided for present conditions, future <br />conditions without treatment and future conditions with <br />recommended treatment. <br /> <br />The targeting study would set priorities for high salt and <br />sediment yielding areas in need of treatment. Funds and personnel <br />couldthen;be directed to those areas with highest potential for <br />success in.achieving the greatest water quality benefits. This <br />proposed iriventory study would enable salinity control and water <br />quality imp~ovements within the Colorado River Basin to proceed in <br />a timely and cost effective manner. <br /> <br />" ,,~-- ~--,,- - - . <br /> <br />