Laserfiche WebLink
<br />~ <br />M <br />.... <br />.... <br />C-., <br />C <br /> <br />Changes in bank storage in Lake Mead were derived on an an- <br /> <br />'nual basis. In all other reservoirs with appreciable changes in <br /> <br />bank storage, the annual changes in bank storage were detennined <br /> <br />as proportions of the annual changes in surface storage in the <br /> <br />respective reservoirs. The percentages applied in estimating the <br /> <br />changes in bank storage were the same as those derived or applied <br /> <br />for average 1914-1945 and 1946-1951 conditions. <br /> <br />(e) Channel salvages - Annual channel salvages were prorated <br /> <br />to the states and Mexico on the same bases described in detail in <br /> <br />the report for average 1914-1945 conditions. <br /> <br />Annual salvages of channel evaporation in the various stream <br /> <br />sections were detennined as differences between the annual losses <br /> <br />by evaporation from stream channels under virgin flow conditions <br /> <br />and under historic flow conditions. Annual virgin and historic <br /> <br />channel evaporation losses were assumed to vary from the averages <br /> <br />for the 1914-1945 and 1946-1951 periods as one-half the deviation <br /> <br />of the annual virgin and historic flows from the average flows <br /> <br />for the respective periods in the various stream sections. <br /> <br />The annual salvages by the replacement of native vegetation <br /> <br />by beneficial uses in the several irrigated areas were determined <br /> <br />from the average 1914-1945 and 1946-1951 replacements by applying <br /> <br />annual deviation factors computed as the ratio 01' the annual use <br /> <br />by crops to the average 1914-1945 and 1946-1951 use by crops in <br /> <br />each irrigated area. <br /> <br />Most of the annual increased or decreased channel losses from <br /> <br />native growth changes were detennined for the various stream sections <br /> <br />22 <br />