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where IRDPLN is the upstream monthly streamflow depletion (acre-feet per month), and <br />j <br />DCOEF is the monthly depletion distribution coefficient for the upstream basin b. <br />b,j <br />Determine the time series for estimated natural streamflow at the USGS gaging station (CRDSS <br />? <br />core station): <br />NATFLW = GFLW + STG + EXDIV - IMDIV <br />s,j j j j j <br />+ BYDIV + MUDPLN + IRDPLN (8) <br />j j j <br />where NATFLW is the estimated natural streamflow (acre-feet per month) for the CRDSS <br />s,j <br />core station s, and GFLW is the historical gaged streamflow at the USGS gaging station (acre- <br />j <br />feet per month). <br />Create an output text file, <basin>.NAT, containing the estimated natural streamflow at the <br />? <br />specified CRDSS core station. Store the estimates of natural streamflow for later use to <br />determine natural streamflow and inflow at MODSIM network model nodes. A partial example <br />of an output text file is shown in Table 5. <br />TABLE 5. CRDSS CORE STATION <br />USGS GAGE NAME <br />USGS GAGING STATION ID NO. 9110000 <br />ORDER NO. 1000 <br />NATURAL STREAMFLOW, ACRE-FEET <br />YEARJANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDECTOTA L <br />1970 <br />1971 <br />1972 <br />1973 <br />1974 <br />etc. <br />Total <br />Adj. <br />Total <br />No. <br />Years <br />Min <br />Max <br />Mean <br />Medium <br />Sdev <br />Repeat output for all additional CRDSS core stations. <br />Notes:1.?-indicates that the month is not within the period of record. This month is not included as <br />part of any of the statistics. <br />2.NC indicates that a value is not calculated because of missing data. <br />3.No. Years indicates number of years of data (No. Years does not include missing data). <br />4.Adj. Total indicates adjusted total which equals ?Total*(1974-1970+1)/No. Years.? <br />8 <br />A275 01.09.95 1.15-15 Hyre, Fosha <br />