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<br />Task I1Ia-3 <br /> <br />Yampa River Basin Model Enhancement <br /> <br />Objective: The Yampa River basin model will be enhanced to include the approximately 25 <br />percent of current water use which was left "in the gage" in the Phase II model. <br />Additional diversions and storage structures will be aggregated to produce a <br />manageable data set and to avoid significantly degrading computational performance. <br />The final model will be calibrated and documented, <br /> <br />Prerequisite: The Phase II Yampa River Basin model is documented and calibrated with <br />approximately 75 percent of the current water use modeled and with irrigation <br />demands based on the 1993 GIS mapping in the calculated scenario, <br /> <br />Assumptions: - Study period is 1975 through 1991. <br />- Total irrigation consumptive use is defmed as the consumptive use associated with <br />the irrigated acreage recorded in the CRDSS irrigated acreage spatial database, <br />Structures and water rights not tied to irrigated parcels will not be included in the <br />model, but will be documented as being excluded, <br /> <br />Task Leader: Meg Frantz (Boyle) <br /> <br />1055 <br /> <br />Phase IlIa Scope of Services <br /> <br />A-25 <br /> <br />June 12, 1996 <br />