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<br />· Task IIIa- 4 Gunnison River Basin WRPM Enhancement <br /> <br />Objective: The Gunnison 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. Additional <br />diversions and storage structures will be aggregated to produce a manageable data set and to avoid <br />significantly degrading computational performance. The final model will be calibrated and <br />documented. <br /> <br />Prerequisite: The Phase II Gunnison River Basin model is documented and calibrated with <br />approximately 75 percent of the current water use modeled and with irrigation demands based on the <br />1993 GIS mapping in the calculated scenario. <br /> <br />Assumptions: - Study period is 1975 through 1991. <br />- Total irrigation consumptive use is defined as the consumptive use associated with the <br />irrigated acreage recorded in the CRDSS irrigated acreage spatial database. Structures and water <br />rights not tied to irrigated parcels will not be included in the model, but will be documented as being <br />excluded. <br /> <br />. <br /> <br />The Tasks for Task 4, Gunnison River Basin WRPM Enhancement, are the same as the Tasks for <br />Task 3 except for the basin of interest, the allocated budget, the projected work schedule, and the <br />activities described in the table labeled Task 4 Activity Modification (from Task descriptions in <br />Task 3). <br /> <br />Task Leader: Meg Frantz (Boyle) <br /> <br />Task 4 Activity Modification (from Task descriptions in Task 3) <br /> <br />.' <br /> <br />Task No, Descriptio'n Activity Modificatio<<ffomT,;sk3 Tasks <br /> , <br />4,01 Phase 1I1nstream Flows None <br />4,02 Map Preparation None <br />4.03 Aggregate Irrigation Anticipate approximately 30 aggregated irrigated structures <br /> Structures <br />4,04 Add Aggregated Structures to None <br /> Network <br />4.05 Define Water Right Classes None <br />4,06 Assign Return Flow Same as 3,06 except there are more nodes and the exceptions in the <br /> Characteristics Gunnison may be more frequent than in the Yampa. <br />4.07 Generate Aggregated Same as 3.07 except there are more structures as noted in 4.03. <br /> Parameters These will need to be visually checked for major errors, <br />4.08 Assign Aggregated Irrigation None <br /> Efficiencies <br />4,09 Generate New .ddm and .ddh None <br /> Files <br />4,10 Aggregate M&1 Demands None <br /> <br />Phase IlIa Scope of Services <br /> <br />1148 <br /> <br />A-37 <br /> <br />Jan31,1997 <br />