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<br />!J <br />.d.d- <br />U~ <br />11<;3 <br />00 <br />(..:> <br />... <br />- <br />c:. <br />"C. <br /> <br />COlJTENTS <br /> <br />Section <br /> <br />page <br />1 <br /> <br />I. <br /> <br />INTRODUCTION. <br /> <br />. . . . . . . . . . . <br /> <br />. . . <br /> <br />. . . . . <br /> <br />II. BASIC DATA.. ..... ... . . . . .. .... 2 <br />A. Climatological Data .. . . . . . . . 2 <br />B. Historic Stream Flow at Key Gaging Stations .. ... 3 <br />C. Drainage Areas Above Key Gaging Stations. . ... 3 <br />D. Depletions of Ground-Water Basins . . . . . . . . . . . 3 <br />E. l'later Using Areas Influenced by Man. ..... .. 5 <br />1. Irrigated Areas . . . . . . . . . .. ...... 5 <br />2. Cropped Areas . . . . . . . . . . . . . . . . . .. 5 <br />3. Water Consuming Noncropped Areas .. . . . . . .. 5 <br />4. Channel Areas . . . . . . . . . . . . . . . .. . 9 <br />5. Reservoir Depletions. . . . . . . . . . . . . . 9 <br />(a) Evaporation depletions . .. ...... . 9 <br />(b) Change in storage in reservoirs. ...... 9 <br />6. Transbasin Export Diversions. . .. ..... 12 <br /> <br />III. ANALYSES. . . . . . . . . . . . . . . . . . . . . . . . . 14 <br /> A. stream Depletions at Sites of Use . . . . . . . . . . 14 <br /> B. Channel Losses. . . . . . . . . . . . . . . . . . . . 15 <br /> C. Water Contributions by States . . . . . . . . . . . . 17 <br /> <br />IV. ANNUAL ESTIMATES FOR 1914-1951 PERIOD . . . . . . . . . . 18 <br /> A. Annual Variations in Stream Depletions . . . . . . . . 18 <br /> l. Upper Colorado River Basin Depletions . . . . . . 19 <br /> 2. Lower Colorado River Basin Depletions . . . . . . . 19 <br /> (a) Crops. . . . . . . . . . . . . . . . . . . . . 19 <br /> (b) Noncropped areas . . . . . . . . . . . . . . 21 <br /> (c) Transbasin export diversions . . . . 21 <br /> (d) Reservoir depletions . . . . . . . . . . . . 21 <br /> (e) Channel salvages . . . . . . . . . . . . . 22 <br /> (f) Depletions of ground-water basins . . . . 23 <br /> B. Annual Estimates of Virgin Flows. . . . . . . . . 24 <br /> <br />APPENDIX. . . . . . . . . . . . . <br />Tables of Irrigated Acreages <br /> <br />.42 <br /> <br />. . . . <br /> <br />. . . <br /> <br />. . <br /> <br />i <br />