Laserfiche WebLink
<br />. <br /> <br />.... ~.' 1", ''''n~\ 4 <br />l.I i.!!J . '.' <br /> <br />. <br /> <br />PART vm. CALCULA nON OF VIRGIN STREAMFLOW <br /> <br />. <br /> <br />The virgin flow of the Animas River is equal to the historic estimated <br /> <br /> <br />streamflow, con'ected for the historic operation of Electra Lake, lake evapora- <br /> <br /> <br />tion, trans basin diversions by Durango, municipal consumptive use, and itrigation <br /> <br /> <br />depletions. Specifically, virgin streamflow was estimated through use of the <br /> <br /> <br />following relationship: <br /> <br />. <br /> <br />Virgin streamflow (at a specific location) = Estimated historic streamflow <br /> <br />+ Electra Lake change of storage <br /> <br />+ Electra Lake evaporation losses <br /> <br />+ Irrigation net depletions up- <br />stream of the location <br /> <br />+ Durango net depletions up- <br />stream of the location <br /> <br />. <br /> <br />. <br /> <br />Monthly summaries of virgin flows for each river segment are presented in <br /> <br /> <br />Appendix B. On an average annual basis, estimated virgin flows are equal to <br /> <br /> <br />about 98 percent of historic flows at Durango, indicating that relatively small <br /> <br /> <br />use has been made of Animas River flows in the past. The wider disparity <br /> <br /> <br />between estimated historic and virgin flows at the Cedar Hill gage is attributable <br /> <br /> <br />primarily to itrigation depletions in the Florida River basin. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />-zo- <br /> <br />. <br /> <br />,.t <br />:: ,-,,;;' <br />