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TABLE 4.1.3a <br />Streamflow Comparison <br />Average (acre-feet/year) 1975-1991 <br /> <br /># <br />ID <br />Name Base <br />Streamflow Historical <br />Streamflow <br />1 9303000 NF WHITE R AT BUFORD FLO 238135 235947 <br />2 9303400 SF WHITE R NR BUDGRE_FLO 147632 147632 <br />3 9303500 SF WHITE R NR BUFORD FLO 194376 193873 <br />4 9304000 SF WHITE R AT BUFORD_FLO 194142 189533 <br />5 9304200 WHITE R AB COAL CREE FLO 489468 414807 <br />6 9304500 WHITE RIV NR MEEKER FLO 498963 461026 <br />7 9304800 WHITE R BELOW MEEKER FLO 518134 496214 <br />8 9306007 PICEANCE CK BL RIO B_FLO 16018 14857 <br />9 9306200 PICEANCE CK BL RYAN FLO 33547 27967 <br />10 9306222 PICEANCE CK AT WHITE FLO 36854 32097 <br />11 9306224 WHITE R AB CROOKED W FLO 573485 544716 <br />12 9306290 WHITE R BL BOISE CRK FLO 574538 543720 <br />13 9306395 WHITE R NR COLO STAT FLO 599188 558654 <br />4.1.4 Historic Streamflow File - whiteT.rih <br />The whiteT.rih file contains historic streamflow records that are used for baseflow generation and <br />model calibration. Appendix C describes the technique used to fill data gaps, along with the data <br />filling results. The locations of streamflow gages modeled are shown in Figure 4.1.1 a. For a more <br />detailed discussion on the historic streamflow file, see the StateMod Users' Manual. <br />Sixteen (16) United States Geological Survey (USGS) streamflow gages were initially identified for <br />inclusion in the White Model. Not all gaging stations were in operation during the entire study <br />period, and of the 16 gaging stations identified, 13 were used. Table 4.1.3a presents the historic <br />flows for the water years 1975-1991 and the average estimated base streamflows at each of the 14 <br />USGS gages used in the baseflow development and model calibration. The difference between <br />baseflow and historic streamflows presented in Table 4.1.3a may be interpreted as historic basin <br />depletions. <br />4.1.5 Baseflow File - whiteT.rib <br />The baseflow file contains proration factors that allow baseflows estimated at gaged locations to be <br />distributed to ungaged locations throughout the basin. Proration factors were developed at selected <br />points throughout the river basin using the following guidelines: <br />• The most upstream diversion structure in each tributary <br />• Critical points of interest, such as river confluence points <br />• All reservoir locations <br />The whiteT.rib input file contains the proration factors used by StateMod to distribute gaged flows <br />throughout the river basin. At a given baseflow location, proration factors were developed using one <br />of two techniques, the gain approach or the nearby gage approach. For the gain approach, proration <br />factors were defined as the fraction of the reach gain that was estimated to be tributary to a baseflow <br />River System 4-4 <br />