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<br />n a a. A C, ~ <br />, ~'i ;,~ .~'J --' a <br />, v,"'?...P <br /> <br />.. <br /> <br />Conclusions and Reconnnendations <br /> <br />Flows as they were developed are considered to adequately represent <br /> <br />appraisal level estimates of model inflows. <br /> <br />Two sets of virgin flow estimates for Upper Gunnison inflows (INFLS <br /> <br />through INFLSl) were developed. Adjusted inflows were developed for which <br /> <br />negative values in difference files were eliminated and set to zero. This <br /> <br />adjustment was made by reducipg contributipg core station flow values for <br /> <br />those months in which negatives occurred. Adjusted inflows represent a more <br /> <br />conservative water supply situation than unadjusted values. Flows for <br /> <br />con.tributipg areas located upstream are reduced, while lower intervenipg area <br /> <br />flows are increased. <br /> <br />Unadjusted inflows may more represent virgin flow condi tions on a <br /> <br />'j. <br />i' <br /> <br />lopg-term annual average basis. However, using unadj usted flows resul ts in <br /> <br />negative values occurripg indifference files. It h therefore reconnnended <br /> <br />that adjusted inflow file values be used: they represent a more conservative <br /> <br />water supply scenario, and eliminate negative inflows from occurripg .in <br /> <br />difference files. <br /> <br />Should the opportunity arise for reiteration of inflow development, <br /> <br />several changes which would result in the reduction in frequency' and magnitude <br /> <br />of negative difference file values should be considered: <br /> <br />Irrigation Depletions: <br /> <br />Present virgin flow derivation has used estimates of irrigation <br />consumptive use to approximate stream depletions attributable to <br />irrigation. As such, these depletions do not adequately address the <br />storage within the soil of early irrigation season diversions and <br />subsequent later season return flows. If possible, future flow <br />development should consider the accountipg of irrigation depletions <br />in terms of actual diversions and return flows. <br /> <br />., <br />Q- <br /> <br />37 <br /> <br />{'t~~1t <br /> <br />~f& <br /> <br />