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<br />AZ <br />AZ <br />A2 <br />A2 <br />AZ <br />AZ <br />AZ <br />AZ <br />AZ <br />AZ <br />AZ <br />AZ <br />AZ <br />AZ <br />AZ <br />A2 <br />AZ <br />AZ <br />AZ 81 <br /> <br />Return fLow Yuma Mesa Outlet Drain 81 9410 * <br />Return flow protective and regulatory pumping unit CI 4154 * <br />Estimated unmeasured groundwater return fLow OJ 8022 <br />Return flow share of Gila Main Canal loss EI 5643 * <br />Subtotal return flow EI 55114 55113 check from above <br />ConslIq)tive Use (see note above) 37678 37679 check from above <br />(A) TotaL for the North Gila Valley, The Yuma Irrigation and the Yuma Mesa Irrigation and Drainage Districts, and 'Unit 8'. <br />(B) Estimated at 85 percent of the Yuma Mesa Outlet Drain with balance credited to 'Unit gl. <br />eC) Estimated at 85 percent of Protective and Regulatory Pumping Unit with balance credited to 'Unit B'. <br />(D) Estimated at 38 percent of the North Gila Valley Diversion at Imperial Dam plus 14 percent of Yuma Irrigation District diversion at <br />ImperiaL Dam. (Based on analysis of the USGS Report 83.4220 entitled IA Method for Estimating Ground.Water Return Flow to the <br />Lower Colorado River in the Yuma Areal) <br />(E) Diversion*milage weighted share of Gila Main Canal loss less canal surface evaporation (1397 af/yr) and prheotophytes (2154 af/yr). <br />(F) Additional unmeasured amounts of return flows from the Yuma Mesa Irrigation and Drainage District, IUnit 81, the Cocopah Indian <br />Reservation, and the Yuma County Water Users Association (YCWUA) are utilized to meet consumptive uses in the United States and in <br />partial satisfaction of the Mexican Treaty obligation. Some of thes underground flows are recovered by pumping from wells on the <br />Cocopah Indian Reservation and in the YCWUA area, and by some of the surface drains in the YCWUA area. Efforts will be made to at least <br />quantify these return flows within broad limits by respective water user entities in future years. <br />Diversion adjusted for delivery to Mohave Valley I. D. D. (Chesney). <br /> <br />:> <br />::::> <br />-' <br />00 <br />W <br />.~ <br />