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<br />Haior Wellton-Hohawk "roltram illl1)act. <br />Inflow diversi,ons from Imperial Dam have' been reduced about 20'10 or 100,000 " <br />acre feet and drainage pumping to maintain stable ground water levels has been <br />reduced in half or about 100,000 acre feet. Gila River flood flows in 1978-80 <br />and 1983, high pre~ipitation, the '1983 Payment In-Kind (PIK) program (about <br />9,000 acres of cotton not'grown in 1983), and croppingpatterns'are sOme ' <br />factors Which have affected the water budget evaluation of program impacts <br />durlng the last six years. The ,combined impaetof the USDA onfarm irrigation <br />improvement program, the BR Irrigation Hanagement Scheduling program, and the <br />BR land retirement and exchange program, and other efforts have been very <br />successful 'in' improvi.ng irrigation water 'use. The program shoul.d succeed in <br />reducing drainage return flows to, the goal of 108,000 acre-feet per year by <br />1987. Tables V-2 and V-3 indicate 'progress made to:date. <br /> <br />Table V-2. <br /> <br />l\) <br />~ <br />~..... <br />1-4, <br /> <br />Reduction in Deep Percolation, 1984 IWK Contracts <br />Wellton~Hohawk Irrigation and Drainage District <br /> <br />, Crop <br /> <br />Alfalfa <br />Cotton <br />Wheat <br />Lettuce (Spring) <br />'ci.trus <br />Watermelon <br />Bermuda <br />Sesame, <br />Grain Sorghum <br />Sudan Grass , <br />Total <br /> <br />Acreage <br />under <br />IWK <br />(Acres) <br /> <br />11 <br />Farm Delivery 1984 <br />Before After Efficiency <br />Ac.Ft/Ac. Ac.Ft/Ac. Percent <br /> <br />Reduction <br />in Deep <br />Percolation <br />Ac.Ft/Ac. <br /> <br />5176 <br />2760 <br />4511 <br />1338* , <br />37* <br />304* <br />638 <br />1381 <br />580 <br />304 <br />17,038 <br />15,359 acres When ,farm delivery was recorde~1 <br /> <br />9.84 7.56 82 <br />5.56 3.93 89 <br />3.49 2.78 79 <br />----~-undetermined--~-- <br />----~-undetermined----- <br />------undetermined---_- <br />5.24 4.1380 <br />3.18 2.30 87 <br />3.49 2.40 90 <br />3.49 2.59 , 85 <br /> <br />1.11 <br />0.88 <br />1.09 <br />0.90 <br />1.45 ' <br /> <br />2.28 <br />1.63 <br />0.71 <br /> <br />11 WKIDDwater delivery records. <br /> <br />11 Deep percolation from 15,359 acres under irrigation water management <br />contract in 1984 was reduced 22,340 acre feet. <br /> <br />-14- <br /> <br />