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<br />c"., <br />r:n <br />l\:. <br />l4::>. <br /> <br />James P. Law. Member ................... <br /> <br />La rry R. Swa rner, Member ............... <br /> <br />John W. Keys, III, Member .............. <br /> <br />Thomas P. Wootton, Observer <br /> <br />Clyde Gould, Observer .................. <br /> <br />Farmers Advisory Group <br /> <br />Thom Blohm <br />Abraham Bodderij <br />Joseph L. Hoffman <br />Marcus Moore <br />Jimmy Naquin <br />W. J. Rider <br />W. M. Wootton <br />John R. Wright <br /> <br />Chief, Agricultural Wastes Section, <br />Robert S. Kerr Environmental <br />Research Laboratory, Environ- <br />mental Protection Agency, Ada, <br />Oklahoma <br />Chief, Maintenance Branch, Water <br />O&M Division, Engineering and <br />Research Center, Bureau of <br />Reclamation, Denver, Colorado <br />Chief, Water Quality Office, <br />Engineering and Research Center, <br />Bureau of Reclamation, Denver, <br />Colorado <br />International Boundary and Water <br />Commission, U.S. Section, <br />El Paso, Texas <br />Manager-Secretary, Wellton-Mohawk <br />Irrigation and Drainage District, <br />Wellton, Arizona <br /> <br />Tacna, Arizona <br />Tacna, Arizona <br />Wellton, Arizona <br />Wellton, Arizona <br />Ro 11, Ari zona <br />Roll, Ari zona <br />Wellton, Arizona <br />Wellton, Arizona <br /> <br />The Special Report "Measures for Reducing Return Flows from the Well ton- <br />Mohawk Irrigation and Drainage District," dated September 1974 presents <br />a coordinated program to reduce the drainage return flows to the lowest <br />practical volume through improvement of irrigation efficiencies and related <br />measures. The technical details of the return flow reduction program were <br />developed by the Technical Field Committee in consultation with a Farmers <br />Advisory Group of local water users in the .District. The TFC is charged <br />with the responsibility for coordinating, monitor.ing, and evaluating the <br />effectiveness of the recommended program during the implementation phase; <br /> <br />In this report, data on water use, crops, and yields were used to determine <br />onfarm irrigation efficiencies for 1970, 1971, and 1972. The average irri- <br />gation efficiency District-wide was about 56 percent. About 214,000 acre- <br />feet annually of drainage return flow is associated with 56 percent irriga- <br />tion efficiency. <br /> <br />23 <br />