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24 Probable Effects of the Proposed Sulphur Gulch Reservoir on Colorado River Quantity and Quality <br />near Grand Junction, Colorado <br />Water-Quality Model <br />Start <br />L~~ Monte Carlo <br />L iteration <br />Model Input <br />Reservoir volume initial (AF) <br />Reservoir concentration initial (mg/L <br />Reservoir volume total (AF} <br />Seasonal release (0=no, 1=yes) <br />Seasonal release amount (AF) <br />Seasonal release period (1 =September, <br />2 =August 15 -October 30) <br />Peak flow release (0=no, 3=yes) <br />Peak flow release amount (AF) <br />Note: all input based on daily values; <br />GHC Government Highline Canal <br />GVIC Grand Valley Irrigation Canal <br />GVWUA Grand Valley Water Users Association <br />MCID Mesa County Irrigation District <br />NLR Nonlinear regression <br />OMID Orchard Mesa Irrigation District <br />PID Palisade Irrigation Districtt <br />PDF Probability Density Function <br />Q Streamflow <br />WR water right <br />Q at Colorado River ,~ <br />near Cameo gage Q Model <br />NLR equation •~ Residual PDF <br />Salinity at Colorado River <br />near Cameo gage <br />Amount of <br />pumped water O Model Surface area <br />parabolic equation <br />Initial storage <br />Evaporation rate <br />Evaporation NLR equation Residual PDF <br />Total reservoir <br />storage <br />Runoff to NLR equation Residual PDF <br />Sulphur Gulch <br />Runoff salinity to I NLR equation Residual PDF <br />Sulphur Gulch <br />Reservoir <br />concentration <br />Evaporation <br />Initial concentration <br />Colorado River Peak-flow release <br />salinity at GHC <br />Low-flow release <br />Figure 16. Flow chart of the stochastic water-quality model. <br />