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<br />- <br /> <br />of che available data w~ll be ma~e this ~iscal year and, if analysis <br />indicates more data are required, the collection and analysis will <br />continue through FY 1976. <br /> <br />:..> <br />1\;) <br />~ <br />>- <br /> <br />Utilization of Return Flows Division <br /> <br />This part of th~ Program will critically examine the potential of <br />diverting irrigation return flows t~ other beneficial consumptive uses <br />such as thermal generating plant cooling and other industrial uses within <br />the area to avoid returning them to the river system. The Palo Verde <br />Drain will be the first source to be studied. The division is pro- <br />grammed for investigation of other return flow sources through fiscal <br />year 1978. <br /> <br />Support Studies <br /> <br />Veqetation Manaqement <br /> <br />This study is not scheduled to start until fiscal year 1976. <br /> <br />Accomplishments in E&R Center Support Activities <br /> <br />Colorado River Ma~hematic3l Models <br /> <br />Two computerized mathematical models have been developed for use in the <br />Colorado River Water Quality Improvement Program. The first of these <br />models is salinity oriented and serves as an accounting system for <br />determining the effect of salt loading at various points on the surface <br />water system. <br /> <br />The more comprehensive river basin model will simulate both quantity <br />and quality conditions of the river system including interaction of <br />surface and ground water. The data analysis and simulation portions of <br />the model are in operation. The first basinwide computer runs are <br />being made at the present time to simulate the river system conditions <br />for projected future population and development. Work will continue on <br />the sensi~ivity and impact analysis portion of the model this fiscal <br />year and in 1975. <br /> <br />Desalinization Process Systems <br /> <br />A special study has been completed of the potential application of ion <br />exchange desalting to the Colorado River System. The intent of this <br />study was to determine the possibilities of controlling salinity at the <br />diversion point from the river rather than at its source. The study <br />indicated it might be possible to achieve large scale river quality <br />control at the 500-ppm level at costs ranging from $15 an acre-foot in <br /> <br />-11- <br />