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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />I. INTRODUCTION <br /> <br />Located in the southeast comer of California, the Imperial Irrigation District (District or lID), is <br />the largest irrigation district in the United States. Agricultural development in the Imperial <br />Valley began at the turn of the century and now includes about 500,000 acres of irrigated land. <br />The lID operates one of the most efficient open canal irrigation systems in existence. Even with <br />that distinction, the District has continually strived to develop ways to improve the efficiency of <br />the system and to conserve water. <br /> <br />In addition to the canal lining program, which began in the early 1950s, the District has <br />constructed a state-of-the-art Water Control Center, automated portions of the delivery system, <br />constructed reservoirs and interceptors, and implemented various on-farm measures to conserve <br />water and improve the efficiency of the delivery system. <br /> <br />This study is devoted to defining specific planning values for the District's future water <br />requirements, coupled with an estimate for the amount of water that could potentially be <br />conserved through the implementation of various water conservation measures. The planning <br />horizon chosen for this study is the year 2045 (50 years). Realizing the inherent inaccuracies and <br />uncertainties with projections 50 years into the future, this document should be updated at <br />regular time intervals (3 to 5 years) to incorporate changes in current trends and assumptions <br />used in this report. <br /> <br />The purpose of this study is to quantify the District's present and future water requirements and <br />to determine the amount of water that might be available for transfer to other users. The first part <br />of this study is focused on defining the estimated water requirements during the planning period <br />(1995-2045). The second phase of the study is designed to identify water conservation methods <br />that could potentially and effectively be used in the District. Each conservation method <br />identified is evaluated for its technical feasibility. The final phase of the study is designed to <br />determine the potential amount of water that could be made available for transfer, taking into <br /> <br />Draft: Subject To Revision 12/21/95 <br /> <br />