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<br />ru <br />tv Irrigation trends will be shown as the M&E program collects <br />tv data over a period of years. <br />C) <br /> <br />E) irrigation adequacies at sites (IWM practices) <br />Information included in section 2. B) summary of field <br />evaluations <br /> <br />3. Well data none <br /> <br />4. Water and salt budgets <br />The following statements and figures were revised downward <br />to reflect current values. These values were obtained <br />through meetings held in 1.993 with John Hedlund, retired <br />NRCS, Western National Technical Center, Portland, oregon. <br /> <br />Salt contribution: It is estimated that the LGCU <br />contributes about 1,400,000 tons of salt annually to the <br />Colorado River thru,deep percolation and seepage; About <br />777,000 tons are attributed to irrigated agriculture on <br />approximately 1.71,000 acres. <br />Salt loading to the Colorado River, at the end of the <br />projected 20 year application of the program, will be <br />reduced to an estimated 61.1.,000 tons per year; a savings of <br />166,000 tons per year. <br /> <br />DeeD percolation and seepaqe: Salt picKup from irrigation <br />is directly proportional to the amount of deep percolation <br />and seepage return flow. Estimates for salt load in the <br />return flow water is 3.2 tons per acre foot per year. <br /> <br />a) reduction in salt <br />Current vear 1995 <br />7,798.86 <br />b) reduction in deep <br />2,357.44 <br /> <br />loading (tons) <br /> <br />Cumulative <br />26,677.52 <br />perc./seepage (acre ft.) <br />8,238.24 <br /> <br />5. Recommendations <br /> <br />a) Producers need to be assisted in the proper management <br />and operation of an improved irrigation system <br />immediately after it is installed. <br /> <br />b) Proper management of individual irrigation events <br />requires a knowledge of improved water management <br />techniques. This can be accomplished best when NRCS <br />field office personnel can regularly work with individual <br />irrigators on a one to one basis during the irrigation <br />season so that producers will apply water based on crop <br />needs. <br /> <br />c) Salt load reduction through IWM can only be achieved <br />through intensive technical assistance and education <br />programs on IWM techniques and crop economics tied to <br />water application. <br /> <br />14 <br />