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<br />TABLE OF CONTENTS <br /> <br />MAP NO. 1244-300-122 . . . . . . . . . <br /> <br />INTRODUCTION, SUMMARY AND CONCLUSIONS. <br /> <br />Purpose and Scope . . . . . <br />Authority for Investigation <br />Colorado River Salinity. . <br />Summary and Conclusions. . <br />Cooperation and Acknowledgements. <br /> <br />PROJECT SETTING <br /> <br />Location <br />Irrigation and Drainage <br />Geology. . . <br />Ground Water <br /> <br />THE SALT PROBLEM. <br /> <br />Salt Discharge to River <br />Discharge by Subarea <br />Analysis of Palo Verde Subarea <br /> <br />Agricultural Development <br />Geohydrology. . . . . . <br />Sources of Salt. . . . <br /> <br />Salt in Ground Water <br />Salt in Unsaturated Soil <br />Other Sources of Salt <br />Total Excess Salt. . . <br /> <br />Mechanics of Salt Discharge <br />Study of Calcium Carbonate Precipitation <br /> <br />POTENTIAL FOR SALINITY CONTROL <br /> <br />Sundesert Nuclear Plant <br />Remaining Potential . . <br /> <br />ALTERNATIVE CONTROL MEASURES <br /> <br />Irrigation Efficiency Improvement <br /> <br />i <br /> <br />Page <br /> <br />Frontispiece <br /> <br />1 <br /> <br />1 <br />1 <br />2 <br />3 <br />4 <br /> <br />6 <br /> <br />6 <br />6 <br />7 <br />8 <br /> <br />10 <br /> <br />10 <br />12 <br />14 <br /> <br />14 <br />15 <br />15 <br /> <br />16 <br />17 <br />18 <br />18 <br /> <br />19 <br />20 <br /> <br />22 <br /> <br />22 <br />24 <br /> <br />27 <br /> <br />27 <br /> <br />002835 <br />