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<br />MAY 1982 <br /> <br />Irrigation water management alone may not be widely accepted. Existing <br /> <br />irrigation practices are the result of farmer experience and judgement, of <br /> <br />water supply and of limited financial resources for implementating system <br /> <br />improvements. Without the incentive of better systems for more uniform <br /> <br />application of irrigation water there is little 1ikelyhood that present <br /> <br />practices will be changed significantly. <br /> <br />Plan Three - Irrigation Water Management and Ditch Lining with Limited <br /> <br />Sprinkler Systems - 21,550 Acres. <br /> <br />This is the same as Plan Two, except that 650 acres of irrigated land <br /> <br />have been added where sprinkler irrigation is the only technically feasible <br /> <br />means of achieving irrigation water management. With the addition of <br /> <br />sprinkler irrigation all of the off-farm group ditches would be placed in <br /> <br />pipe to preserve gravity pressure for proper operation of the sprinklers. <br /> <br />In addition to gravity pressure for 150 acres of the land, booster pumps <br /> <br />will be needed to develop sufficient pressure to operate sprinklers on tIle <br /> <br />remaining 500 acres of land. <br /> <br />This plan can be implemented at a one-time construction cost of <br /> <br />$11,292,00U. Technical assistance and administrative costs, estimated to be <br /> <br />$2,258,000, make a total installation cost of 13,550,000, <br /> <br />Capitalized annual cost, including operation) maintence and replacement <br /> <br />is $1,764,200.!/ Capitalized annual net benefits are estimated to be <br /> <br />$269,600. <br /> <br />Implementation of this plan would not increase the amount of water <br /> <br />diverted annually for irrigation. Seepage from onfarm ditches would be <br /> <br />reduced by 3,000 acre-feet and deep percolation would be reduced by 20,000 <br /> <br />acre-feet. Improved onfarm management of irrigation water would provide <br /> <br />1/ Includes $23.00 per acre pumping cost for 500 acres. <br />V-8 <br /> <br />cctS8Z <br /> <br />~<.j."".,". <br />