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<br />Executive Summary <br /> <br />Colorado River to capture water ordered, <br />but not diverted, and regulatory waste that <br />would otherwise be lost to Mexico as excess <br />deliveries. <br /> <br />" <br /> <br />Future Without the VDP <br /> <br />, <br /> <br />No permanent approach to complying with <br />the obligations of Minute No. 242, other <br />than operating the YDP, is under active <br />consideration. If the YDP is not operated, <br />all WMIDD irrigation drainage would <br />continue to be bypassed. <br /> <br />After the United States loses use of the <br />water conserved by lining the Coachella <br />Canal, it will have a significantly reduced <br />ability to replace this bypass. Should the <br />United States secure water to replace the <br />reject stream, that amount of water would <br />be available to replace bypassed WMIDD <br />irrigation drainage. Otherwise, the United <br />States would have no means of replacing <br />any bypassed drainage. <br /> <br />As defmed in section 102(a) of Public <br />Law 93-320, the United States will lose use <br />of the water conserved by lining the <br />CoacheUa Canal <br /> <br />'. <br /> <br />...the first year that the Secretary <br />delivers main stream Colorado River <br />water to California in an amount less <br />than the sum of the quantities <br />requested by (1) the California <br />agencies under contracts made <br />pursuant to section 5 of the Boulder <br />Canyon Project Act (45 Stat. 1057) <br />and (2) Federal establishments to <br />meet their water rights acquired in <br />California in accordance with the <br />Supreme Court decree in Arizona <br />against California <br />(376 U.S. 340). <br /> <br />~ <br /> <br />If the United States decides not to operate <br />the YDP, Mexico could view this as <br />unwillingness to comply with Minute <br />No. 242, the permanent and definitive <br /> <br />solution to the salinity problem. Relations <br />with Mexico could be further strained over <br />the differential to be maintained in the <br />future. The United States is already under <br />pressure to maintain the differential at <br />115 ppm at all times. To conserve water for <br />use in the United States, the Basin States <br />could urge a differential closer to 145 ppm <br />(115 ppm plus 30 ppm). <br /> <br />Advancing Desalting <br />Technologies <br /> <br />Herbert Brownell stated in his report on the <br />salinity problem: <br /> <br />The desalting plant itself would <br />materially assist in the development <br />of desalting te~cMology. The <br />information and experience gathered <br />through it would be of value in solving <br />salinity problems predicted to occur in <br />the future elsewhere in the United <br />States and Mexico. <br /> <br />Research performed in support of the YDP <br />has played an important role in advancing <br />desalting technologies. For example, testing <br />at the Yuma Desalting Test Facility in the <br />1970's and early 1980's provided infor- <br />mation that led to improved desalting <br />equipment that has been adopted by the <br />membrane manufacturers. <br /> <br />Reclamation will continue to develop <br />research and development programs <br />focusing on desalting technology exchange, <br />membrane fouling prevention, alternative <br />biocide identification, and pretreatment <br />opHmhation. among other tasks. An ad hoc <br />professional board will be created to help <br />develop, monitor, evaluate, and identify <br />changes in program direction. <br /> <br />Reclamation also continues to share <br />information with the desalting industry <br />through cooperative studies and technology <br />exchange forums. <br /> <br />ES-5 <br />