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<br />t1ri'~18 <br />o ..,1 ~j ...J :~_, <br /> <br />. <br /> <br />I. <br /> <br />SUMMARY OF FLORIDA RIVER MODEL <br />Historic and Virgin Flow Conditions <br />Prepared by W. W. Wheeler and Associates. Inc. <br />November 1984 <br /> <br />Gage Records Used Directly in Model <br /> <br /> <br />A. Florida River near Hermosa <br /> <br /> <br />B. Florida River near Durango <br /> <br />{S(, . Flj "" I ~ ,Y 'jr1 <br />\< <br />\~ <br /> <br />C. Lemon Reservoir releases - Bureau of Reclamation records <br /> <br />D. Lemon Reservoir monthly storage levels - Bureau of Reclamation <br />records <br /> <br />E. Florida River below Florida Farmers Ditch <br />F. Salt Creek near Oxford 1957-1963; 1968-1980 <br />G. Florida River at Bondad 1957-1963; 1968-1980 <br /> <br />II. Gage Records Used in Estimating Streamflow at Ungaged Locations <br />A. Lightner Creek 1928-1945 <br /> <br />. <br /> <br />(.BJ',V <br />)-\.:, " <br />-rt <br /> <br />.b <br />,. <br />.\/' } <br />(-:.:;] J "it <br />V.)'I' ~.I' <br /> <br />C. <br />l <br />v. <br />,,^ <br /><> <br /> <br />~f~ <br />{Iv'" <br /> <br />, ") <br />p\' <br />~' <br />D. <br /> <br />. <br /> <br />B. <br /> <br />The average monthly flow distribution for Lightner Creek was used <br />for estimating the streamflow pattern for ungaged creeks with mean <br />basin elevations of 7600 to 9000 feet. <br /> <br />Hermosa Creek near Hermosa 1951-1980 <br /> <br />The average monthly flow distribution for Hermosa Creek was used <br />for estimating the streamflow pattern for ungaged areas with mean <br />basin elevations over 9000 feet. It was assumea that the annual <br />flow of all ungaged areas over 7600 feet in elevation varies in <br />proportion to the annual flow of Hermosa Creek. <br /> <br />Basin-wide relationship between mean basin elevation and runoff <br />per square mile. Average annual runoff per square mile for 23 gaging <br />stations in the San Juan Basin in Colorado was plotted against mean <br />basin elevation. Average runoff for the various gages was adjusted <br />to represent the 1951 through 1980 study period. Gaging stations <br />affected by significant irrigation diversions were not included. The <br />relationship of runoff versus mean basin elevation is shown on <br />"Figure If. Information concerning the individual drainage basins <br />is presented in Table 1. <br /> <br />Ignacio precipitation records 1951-1980. Ungaged areas tributary <br />to the Animas River with mean basin elevations of less than 7600 <br />feet were assumed to contribute runoff in amounts proportional <br />to precipitation at Ignacio. Monthly rainfall of less than one inch <br /> <br />(~~, <br /> <br />il. "~ <br />