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<br />. <br /> <br />Table VI-l. SUMMARY OF ESTIMATES OF DIRECT AND INDIRECT <br />SALINITY IMPACTS ON AGRICULTURAL USERS BY AREA. <br /> <br />~ <br />o <br />~.... <br />>+:>> <br /> <br />Salinity <br />effects <br />per acre <br /> <br />1 <br />Cost <br />mg/l <br />per acre <br /> <br />Present <br />modified <br />acres <br /> <br />Area <br /> <br />. <br /> <br />Total <br />salinity <br />effect <br />cost per <br />mg/l/year <br /> <br />. <br /> <br />Southern California <br />Imperial County 2 <br />Coachella Valle~ <br />MWD (San Diego) <br />Palo Verde <br /> <br />$ 16 <br />59 <br />65 <br />16 <br /> <br />$ 0.050 <br />0.148 <br />0.203 <br />0.050 <br /> <br />526,000 <br />40,000 <br />32,500 <br />103,800 <br /> <br />Lower Main Stem <br />Colorado River Indian <br />Reservation 11 <br />Remainder Yuma County 23 <br /> <br />Gila Area <br />Salt River P~oject <br />(CAP area) 9 <br />Gila ProjeC:C 21 <br /> <br />TOTAL ' <br /> <br />Indirect effects--0.62 x 66,900 <br /> <br />TO'j.'AL <br /> <br />$ 26,300 <br />7,500 <br />6,600 <br />5,200 <br /> <br />. <br /> <br />lcos~ per mg/l per acre was based on Sun's 1972 study which predicted a <br />crop response to change in salinity concentration of 320 mg/l. <br /> <br />$16 <br />320 mg/l = $0.05 mg/l/acre. <br /> <br />the irrigation water comes from wells, <br />percent of preScllt modified a~res. <br /> <br />2 <br />Twenty percent of <br />acres represent 80 <br /> <br />The 40,800 <br /> <br />.1 <br /> <br />3Represents only the portion of agricultural lands which will not receive a <br />blended water supply. <br /> <br />. <br /> <br />4 <br />Based 0:1 full service ground-water exchange acre equivalent of the CAP <br />area that can be served with Colorado River water. (5.72 acre-feet per <br />, acre at canal side.) <br /> <br />22 <br /> <br />. <br /> <br />. <br />