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<br />e: <br /> <br />. <br /> <br />. <br /> <br />~. .... <br />o <br />0::> <br />N <br /> <br />EVALUATIONS OF EXISTING SALINITY CONDITIONS (continued) <br /> <br />Qual ity data for present mod if ied cond it ions were computed by taking <br />into cons iderat ion (I) the flow weighted average of the concentrat ions of <br />total dissolved solids for the various transmountain diversions, (2) the <br />change in d issol ved sol ids resul t ing from the ex ist ing upper in-bas in <br />developments on the basis of an assumed pickup of 2.0 tons of dissolved <br />solids per acre (4.5 t/ha) of irrigated land and a depletion of 1.5 acre- <br />feet of water per irrigated acre (4500 m3/ha), and (3) in the Lower <br />Basin a consumptive use of 4 acre-feet per acre (12 000 m3/ha) and a 2.0 <br />tons per acre (4.5 t/ha) pickup for irrigation of the Palo Verde Irrigation <br />District, the Fort Mohave, Chemehuevi, and Colorado River Indian lands. <br />The value of 4 acre-feet per acre (12 000 m3/ha) is the rate presented <br />in the Colorado River Basin Project hearings before the Subcommittee <br />on Inigat ion and Reclamat ion of the Committee on Inter ior and Insular <br />Affairs, House of Representatives. <br /> <br />The present mod if ied cond it ions are shown on Table D and are used <br />as a base value for developing the ant ic ipated effect of new deplet ions <br />from new projects and the full development of present partially developed <br />projects in the river basin. The present modified and future conditions <br />should not be anticipated as conditions that might actually oCcur in <br />any given year. These conditions should be considered as period averages <br />only. <br /> <br />46 <br />