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<br />. <br /> <br />.... <br />- <br />Cl:) <br />c..q <br /> <br />. <br /> <br />Summary <br />Part I <br /> <br />Part II <br /> <br />Part III <br /> <br />Part IV <br /> <br /> <br />CONTENTS <br /> <br />. . . . . . . . . . . . . . . . . <br /> <br />Pa~e <br />1 <br />3 <br />3 <br />3 <br />4 <br />5 <br />5 <br />6 <br />6 <br />7 <br />7 <br />10 <br />10 <br />10 <br />11 <br />11 <br />12 <br />13 <br /> <br />Introduction . . . . . . . . . . <br />A. Authorization for report <br />B. Previous reports <br />C. Cooperation <br />Description of Basin <br />A. Geology <br />B. Soils <br />C. Climate <br />D. Vegetation <br />E. Hydrology <br />History of water resource development <br />A. Irrigation development . . . <br />B. Streamflow depletions <br />C. Legal aspects, water quantity <br />1. Colorado River Compact <br />2. ~exican Treaty of 1944 <br />3. Cpper Colorado River Basin Compact <br />4. Arizona vs. California suit in the <br />Supreme Court. . . . . . . . . . <br />5. Colorado River Basin Project Act <br />D. Legal aspects, water quality. <br />1. Water Quality Act of 1965 and related <br />developments . . . . . . . . . . . <br />2. The Federal ~ater Pollution Control Act <br />Amendments of 1972 . . . . <br />3. Relations with Mexico. . . <br />4. Colorado River Basin Salinity Control <br />Act. . . . . . <br />E. Economic conditions . . . . . . . . <br />Causes of salinity . . . . . . . . . . . . . <br />A. Increased concentration from salt additions <br />1. ~atural sources of salinity <br />Cpper Basin . . . . . . . . . . <br />Lower Basin . . . . . . . . . . <br />2. Agricultural sources of salinity <br />3. Municipal and industrial sources of <br />salinity . . . . . . . <br />B. Increased concentration from water depletions <br />1. lnbasin depletions <br />2. Transbasin depletions . <br /> <br />13 <br />14 <br />14 <br /> <br />15 <br /> <br />16 <br />21 <br /> <br />25 <br />25 <br />27 <br />27 <br />,27. <br />28 <br />29 <br />31 <br /> <br />32 <br />32 <br />13 <br />31 <br /> <br />i <br /> <br /> <br />