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<br />AZ Return flow South Gila Valley wells (DPOC's) 57368 <br />AZ Return flow Yuma Mesa Outlet Drain BI 21905 " <br />AZ Return flow protective and regulatory pumping unit CI 5546 " <br />AZ Estimated unmeasured groundwater return flow DI 26685 <br />AZ Return flow share of Gila Main Canal loss EI 12353 * <br />AZ Subtotal return flow FI 136533 136536 check from above <br />AZ Consumptive Use (see note above) 221666 221663 check from above <br />AZ (A) TotaL for the North Gila Valley, The Yuma Irrigation and the Yuma Mesa Irrigation and Drainage Districts, and 'Unit BI. <br />Al (8) Estimated at 85 percent of the Yuma Mesa Outlet Drain with balance credited to 'Unit BI. <br />AZ ee) Estimated at 85 percent of Protective and Regulatory Pumping Unit with balance credited to 'Unit BI. <br />AZ (D) Estimated at 38 percent of the North Gila Valley Diversion at Imperial Dam plUS 14 percent of Yuma Irrigation District diversion at <br />AZ Imperial Dam. (Based on analysis of the USGS Report 83-4220 entitled 'A Method for Estimating Ground-Water Return Flow to the <br />AZ Lower Colorado River in the Yuma Areal) <br />AZ (E) Dlverslon"mllage weighted share of Gila Main Canal loss less canal surface evaporation (1397 af/yr) and phreatophytes (2154 af/yr). <br />AZ (F) Additional unmeasured amounts of return flows from the Yuma Mesa Irrigation and Drainage District, 'Unit BI, the Cocopah Indian <br />AZ Reservation, and the Yuma County Water Users Association CYCWUA) are utilized to meet consumptive uses in the United States and in <br />AZ partial satisfaction of the Mexican Treaty obligation. Some of thes underground flows are recovered by pumping from wells on the <br />AZ 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 />AZ quantify these return flows within broad limits by respective water user entities in future years. <br />AZ 81 Diversion adjusted for delivery to Mohave Valley I. D. D. (Chesney). <br />AZ 91 Main Outlet Drain return flow credit is measured flow at Station 0+00 and includes both Colorado River and Gila River water. Reclamation <br />AZ is working to develop a method to separate the different sources of return flow and will apply that methodology when available. <br /> <br />co <br />c:;; <br />,... <br />Ou <br />c;rc, <br />(/...") <br /> <br />~ <br />