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<br />C\I <br />M <br />- <br />- <br /> <br />(._- <br /> <br />as the differences between the annual uses by native vegetation <br /> <br />c <br /> <br />under historic and under virgin conditions with consideration for <br /> <br />the annual replacement by beneficial uses. Annual uses by native <br /> <br />vegetation in these stream sections under virgin conditions were <br /> <br />assumed to vary from the averages for the 1914-1945 and 1946-1951 <br /> <br />periods as one-half the deviation of the annual virgin flow from <br /> <br />the average virgin flow for the respective pe nods. The uses by <br /> <br />native vegetation under historic conditions in a few of these <br /> <br />stream sections were computed on an annual basis. Annual historic <br /> <br />uses by native vegetation in the other stream sections were varied <br /> <br />from the averages for the 1914-1945 and 1946-1951 periods as one- <br /> <br />half the deviation of the annual historic flow from the average <br /> <br />for the respective periods. <br /> <br />The average 1914-1945 and 1946-1951 increased or decreased <br /> <br />losses from native growth changes in a few stream sections were <br /> <br />varied annually as one-half the deviation from average of the <br /> <br />historic flows in the stream sections. <br /> <br />(f) <br /> <br />Depletions of ~round-water basins - The annual accretions <br />. <br /> <br />to or withdrawals from the ground-water basins were determined as <br /> <br />the differentials in the hydrologic equations resulting from <br /> <br />inflow-outflow studies. The estimates of annual un gaged inflows <br /> <br />to the stream sections were derived from the averages for the 1914-1945 <br /> <br />and 1946-1951 periods by applying the ratios of annual to average <br /> <br />virgin flows of streams near the river sections. <br /> <br />23 <br />