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<br />(l~!{?O <br /> <br />. <br /> <br />- setting it equal to a difference file <br />- proportioning difference files according to area or area <br />weighted elevation derived yields <br /> <br />or <br /> <br />- developing annual yield estimates from elevation yield <br />curves, with monthly distribution done by proportioning of <br />core station flows. <br /> <br />Results in Table A appear to indicate that the majority of <br />intermittent zero values occur in flows developed from <br />difference files; monthly average zero flows generally occur <br />in fall and winter months. <br /> <br />4.) Agricultural Consumptive Use Rates: <br /> <br />Inflow development utilized Colorado River Simulation <br />System (CRSS) and Colorado River System Consumptive Uses and <br />Losses Report (CU&L) irrigation depletion rate estimates. <br />Rates developed for the Upper Uncompahgre, Lower Uncompahgre, <br />Smith Fork/North Fork, and Lower Gunnison areas of the <br />Gunnison basin were used for expanded network flow <br />development. <br /> <br />. <br /> <br />Irrigated acreage and depletion rates as used in deriving <br />natural inflows for the "expanded network" (Uncompahgre, Smith <br />Fork/North Fork, and Lower Gunnison mainstem) portion of the <br />model were provided to Hydrosphere. Acreages and depletion <br />rates were used to define agricultural demands in the model. <br /> <br />the irrigated acreage figures were considered the <br />best estimates available, pending completion of the GIS <br />irrigated acreage inventory being done by the Remote <br />Sensing section in conjunction with the State Engineer's <br />Office. <br /> <br />at the time that depletion rates were provided to <br />Hydrosphere, it was noted that these rates include <br />adjustments for incidental use and shortage conditions. <br />Inclusion of such adjustments was appropriate for use in <br />natural flow development, but should not be included in <br />modeling irrigation demands where it is "up to the model" <br />to compute shortages for varying demand and hydrology <br />conditions. These rates were used in Hydrosphere's Beta <br />test version of the model as place holders to facilitate <br />the debugging process. <br />The rates provided to Hydrosphere are listed in Table d. <br />Plots of annual ('52-'90) rates for the Upper <br />Uncompahgre, Lower Uncompahgre, Lower Gunnison, and Smith <br />Fork/North Fork areas are shown on Figures 1-4. <br /> <br />. <br /> <br />Hydrosphere has requested depletion rates with incidental <br />use and shortage adjustments backed out (base Blaney-Criddle <br />