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<br />. <br /> <br />TABLE OF CONTENTS (Continued) <br /> <br />Page: <br /> <br />B. Ground-Water Resources <br /> <br />44 <br /> <br />I. Yuma Area <br />2. Wellton-Mohawk Area <br /> <br />44 <br />46 <br /> <br />C. Hydrologic Systems in the Wellton-Mohawk Division. <br /> <br />46 <br /> <br />I. <br />1 <br /> <br />46 <br />48 <br />48 <br />50 <br />50 <br /> <br />3. <br />4. <br />5. <br /> <br />Canal and Lateral Losses and Waste <br />Consumptive Use <br />Irrigation Efficiency <br />Leaching Rcq uirement <br />Nonbeneficial Consumptive Use <br /> <br />D. Return Flow in the Main Outlet Drain <br /> <br />50 <br /> <br />I. <br />1 <br /> <br />Historic Return Flows <br />Deep Percolation <br /> <br />50 <br />51 <br /> <br />E. Water Quality <br /> <br />. <br /> <br />52 <br /> <br />I. <br />, <br /> <br />Colori.llio River <br />Ground-Water Infiltration <br />Main Outlet Drain <br />Return Flows to the River <br /> <br />Below Imperial Dam <br /> <br />52 <br />53 <br />53 <br />53 <br /> <br />3. <br />4. <br /> <br />a. Yuma Mesa Wells <br />b. South Gila Drainuge <br />c. Other Measured Returns <br />d. Unmeasured Returns <br /> <br />53 <br />54 <br />54 <br />54 <br /> <br />CHAPTER VI.PLAN FORMULATION. <br /> <br />56 <br /> <br />A. Provisions of Public Law 93-320 <br />B. Pro posed Pia n <br /> <br />. <br /> <br />56 <br />57 <br /> <br />I. <br /> <br />Reduction of Wellton-Mohawk Return Flows <br />Desalting of Wellton-Mohawk Return Flows <br /> <br />57 <br />59 <br /> <br />, <br /> <br />a. Yuma Desalting Plant Sizing Study <br /> <br />60 <br /> <br />(I) Method of Analysis <br />0) Desalting Plant Operation Studies <br />(3) Selection of Plant Capacity <br />(4) Sensitivity Analysis <br /> <br />61 <br />67 <br />67 <br />68 <br /> <br />iii <br />