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r- <br />n <br />v <br />u� <br />m <br />N <br />m <br />m <br />N <br />N <br />CE <br />m <br />r- <br />�n <br />m <br />r_ <br />m <br />0 <br />z <br />X <br />CE <br />LL <br />Q <br />U <br />3 <br />FY <br />0 <br />Modifications to the DWR StateCU Model <br />Item <br />orig inal Value <br />Revised Value <br />Explanation <br />Maximum <br />0.5 <br />0.4 <br />Average ditch loss of 20 percent and maximum farm <br />System <br />efficiency of 50 percent for a system efficiency of 40 <br />Efficiency <br />percent (0.8x0.5) are more reasonable for the Upper <br />Gunnison basin considering the shallow soil types. <br />Grass Hay Crop <br />Values from Irrigation Water <br />Values from "Water Use by <br />The TR -21 crop coefficients are not reasonable given <br />Coefficients <br />Requirement TR -21 ", USDA, April <br />Native Grasses in High Altitude <br />the low nighttime temperatures in the Upper Gunnison <br />1967 <br />Colorado Meadows", USDA, <br />basin. <br />October 1973 <br />Missing <br />Option to set = 0.0 or use "Pro- <br />"Pro - rated" Method. <br />Diversions estimated based on crop water requireonent <br />Diversions <br />rated method <br />shortage. Shortage at structure esgmated to be the <br />Records <br />same as average shortage for structures Wth <br />diversions within the same water district. See StateCU <br />documentation for further details. <br />