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<br />o <br />::-J <br />- <br />- <br />o <br />c. <br /> <br />1914-1945 period. The ratios were determined from averages of <br /> <br />the combined virgin flows of the Little Colorado River at Grand <br /> <br />Falls, the Paria River at Lees Ferry, Bright Angel Creek near <br /> <br />Grand Canyon, the Virgin River at Littlefield, and the Bill <br /> <br />Williams River at Planet. <br /> <br />Bank storage in Mohave Lake for water years 1950 and 1951 <br /> <br />(the period of reservoir operation) was derived on the basis that <br /> <br />bank storage in Mohave Lake would bear the same relationship to <br /> <br />surface storage accretion as that determined in the report for <br /> <br />Lake Head for the 1914-1945 period or 12.5 percent. <br /> <br />Changes in bank storage in Havasu Lake were derived for <br /> <br />water years 1946 through 1951 on the basis that changes in bank <br /> <br />storage in Havasu Lake would bear the same relationship to changes <br /> <br />in surface storage as tha t detennined in the report for Lake Mead <br /> <br />for the 1914-1945 period or 12.5 percent. <br /> <br />Changes in bank storage in the Salt River reservoir system <br /> <br />and the Verde River reservoir system for the 1946-1951 period <br /> <br />tfere derived on the basis tha t changes in bank storage would bear <br /> <br />the same relationship to changes in surface storage in the <br /> <br />respective reservoir systems for the 1946-1951 period as that <br /> <br />determined in the report for the Salt River reservoir system for <br /> <br />the 1914-1945 period or 14.6 percent. <br /> <br />Surface storage in San Carlos Reservoir on the Gila River <br /> <br />was very sm~ll during the 1946-1951 period and the effect of <br /> <br />changes in bank storage on the flo~l of the stream "as considered <br /> <br />negligible. <br /> <br />11 <br />