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<br />TABLE 8. <br /> <br />IRRIGATION WATER MANAGEMENT ANALYSIS (IRMA)l! <br />VIRGIN VALLEY SUBEVALUATION UNIT, ARIZONA, NEVADA <br /> <br />Future Without 2/ <br />Salinity Program- Alternative 1 <br /> <br />Alternative 2 <br /> <br />Factor <br /> <br />On farm <br />Efficiency 3 <br />Percent41area weighted)-! 42.9 57.9 62.1 <br />Percen~ 38.3 55.7 62.3 <br />Seasonal Gross <br />Application <br /> Acre-feet 40,830 28,948 25,890 <br /> Acre-feet/acre li.68 8.28 7.41 t~ <br />Seasonal Net <br />Application <br /> Acre-feet 15,630 16,127 16,127 <br /> Acre-feet/acre 4.47 4.62 4.62 <br />Seasonal Net <br />Runoff <br /> Acre-feet 6,375 3,080 5,297 <br /> Acre-feet/acre 1.82 .88 1.52 <br />Seasonal Deep f, <br />Percolation <br /> Acre-feet 18,825 9,740 4,467 <br /> Acre-feet/acre 5.39 2.79 1.28 <br />1/ Based on projected area of 3,495 acres. No Utah irrigated <br /> lands in this subevaluation unit. <br />2/ The ongoing co.nservation program is assumed to continue. ~~ <br />3/ Efficiency computed as an area weighted average by field <br /> where efficiency is net application divided by gross appli- <br /> cation. <br />4/ Efficiency equal to seasonal net application divided by seasonal <br /> gross application. <br /> 'Ii! <br /> <br />t:UC::C8 <br /> <br />39 <br />