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<br />. <br /> <br />... C' 0 <br />OO{}, In,) <br /> <br />. <br /> <br />PART vm. CALCULATION OF VIRGIN STREAMFLOW <br /> <br />. <br /> <br />The histDric stream flows at VariDUS 10catiDns along the FIDrida River <br /> <br />were estimated by taking into account histDric diversiDns and return flows occur- <br /> <br /> <br />ring upstream Df each IDcation. Under virgin streamflDw cDnditiDns, such diver- <br /> <br /> <br />sions and return flDws wDuld nD IDnger DCCur. Therefore, the virgin flDW Df <br /> <br /> <br />the FIDrida River is equal to the histDric estimated streamflow, cDrrected for <br /> <br /> <br />the histDric DperatiDn Df LemDn ReservDir, reservDir evapDratiDn, transbasin <br /> <br /> <br />diversiDns by Durango, and irrigatiDn depletiDns. Specifically, virgin streamflow <br /> <br /> <br />was eatimated thrDugh use Df the fDllDwing relatiDnship: <br /> <br />. <br /> <br />. <br /> <br />Virgin Streamflow (at a specific IDCatiDn) = HiStDriC flDw belDw LemDn Res. <br />+ LemDn ReservDir change of <br />stDrage <br /> <br />. <br /> <br />+ LemDn ReservDir evapDratiDn <br />IDsses <br /> <br />+ Accumulative tributary inflDws <br />frDm LemDn ReservDir tD the <br />specific IDcatiDn <br /> <br />. <br /> <br />Applying estimates fDr these cDmpDnents for each river segment as described <br /> <br /> <br />in the previous sectiDns, the average annual virgin flDWS were calculated as <br /> <br /> <br />shown in Table 12. MDnthly summaries Df virgin flDWS fDr each river segment <br /> <br /> <br />are presented in Appendix C. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />-20- <br /> <br />. <br /> <br />., <br /> <br />',; <br /> <br />ji.,..~ <br />