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<br />, <br /> <br />(i{!~) <br /> <br />I~;'J.!~;) <br /> <br />. , . <br /> <br />1"~"",Q.~7 <br />~" : " " <br />....-' '-' '.r 'J--.. <br /> <br />Reservoir Effects: ' <br /> <br />In addition to irrigation depletions, another aspect to be <br />checked would be reservoir effects considered in deriving virgin <br />flow estimates for the base station (Gunnison River at Crystal Dam). <br />Bank storage effects are computed as a constant percentage <br />(10 percent) of Blue Mesa monthly change in storage. In high <br />storage and release months, this can result in a significant <br />adjustment. Actual bank storage and release patterns and quantities <br />may be different. <br />Reservoir evaporation is accounted for by using constant <br />monthly evaporation rates multiplied by reservoir area. No <br />consideration is made for fluctuation in monthly evaporation rates <br />on a year-to-year basis. <br /> <br />Miscellaneous: <br /> <br />In addition to the above considerations, several other <br />adjustments to the virgin flow estimates for the Gunnison River at <br />Crystal Dam virgin flow estimates, though minor, should be taken <br />into account. These include: <br />1. An approximate 8,000 acre-foot increase to 1955 <br />irrigation depletions (see Appendix B). <br />2. Consideration of Crystal Reservoir storage effects from <br />1977 through 1983. <br />3. Verification that Cimarron Canal diversions from the <br />Cimarron River have been considered. <br /> <br />Incorporating these changes would inv01ve a considerable amount of work. <br /> <br />The resulting degree of improvement in flow estimates is not presently known. <br /> <br />38 <br />