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Show PROBLEMS OF IMPERIAL VALLEY AND. VICINITY. 41 PLAN 2. MAXIMUM STORAGE NEEDED FOR IRRIGATION DEVELOPMENT. Acres. Upper basin, additional acreage.........:...........,........... .'.-. .->.,. 2,547,000 Lower basin: Present acreage...............................,.......... 698,000 Additional acreage...........................'___.......1, 322,000 --------------2,020,000 Total........................................................... 4,567,000 Table No. 15.-Estimated demand for ultimate acreage. [Acre-feet.] 1 Of this total, 317,000 acre-feet is for diversion outside the basin. Table No. 16.-Storage required for full irrigation development, evaporation neglected* PLAN 3. COMPLETE, CONTROL OF THE RIVER. Average annual discharge at Boulder Canyon after Allowance for past Acre-feet. depletion above___.......................................___^... 15, 700,000 Average future depletion from upper basin___......................... 4,030,000 Ultimate discharge............................................. 11, 670,000 Mass coqiputations give the following results: Acre-feet. Average annual draft...................................'..........___ 11,670,000 Storage required for complete control......... -...«.. /................. 25,000,000 Average annual evaporation (5-foot depth)___...."......,.............. 520,000 Average useful annual draft..........................^ ....... 11,150,000 Ultimate irrigation needs lower basin.................................. 8,300;, 000 Used for power. /........................................___.. 2, 850,000 1 In the years marked thus, the entire run-off is short by the amounts shown. To supply this it is necessary to carry over water from previous years which detail calculations, including evaporation of 5 feet in depth, show will require 11,000,000 acre-feet of storage ' ¦ |
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Original book: [State of Arizona, complainant v. State of California, Palo Verde Irrigation District, Coachella Valley County Water District, Metropolitan Water District of Southern California, City of Los Angeles, California, City of San Diego, California, and County of San Diego, California, defendants, United States of America, State of Nevada, State of New Mexico, State of Utah, interveners] : |