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<br />. <br /> <br />Task IIIa-S <br /> <br />Upper Colorado River Basin WRPM Enhancement <br /> <br />Objective: The Upper Colorado 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 Upper Colorado 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 5, Upper Colorado River Basin WRPM Enhancement, are the same as the Tasks <br />for 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 5 Activity Modification (from Task descriptions in <br />Task 3) <br /> <br />, Task Lcader: Mcg Frantz (Boyle) <br /> <br />Task 5 Activity Modification (from Task descriptions in Task 3) <br /> <br />. <br /> <br />Task No, ' Description Activity Modification from Task 3 Tasks <br />,','.. " <br />5.01 Phase II Instream Flows None <br />5.02 Map Preparation None <br />5.03 Aggregate Irrigation Anticipate approximately 70 aggregated irrigated structures <br /> Structures <br />5.04 Add Aggregated Structures to to reflect number of Base Flows indicated in 5.03 <br /> Network <br />5.05 Define Water Right Classes None <br />5.06 Assign Return Flow Same as 3.06 except there are more nodes and the exceptions in the <br /> Characteristics Colorado may be more frequent than in the Yampa, <br />5.07 Generate Aggregated Same as 3.07 except there are more structures as noted in 5,03, <br /> Parameters These will need to be visually checked for major errors. <br />5,08 Assign Aggregated Irrigation None <br /> Efficiencies <br />5,09 Generate New ,ddm and .ddh None <br /> Files <br /> <br />Phase IlIa Scope of Services <br /> <br />A-39 <br /> <br />1146 <br /> <br />Jan31,1997 <br />