OCR Text |
Show CALIFORNIA DEFENDANTS Exhibit No. 1235 Identification: July 15, 1957 Admitted Extract From National Resources Planning Board, Pecos River Joint Investigation, Part III, Section 3, Consumptive Water Use and Requirements (1942). (P- 172) One of the important elements in the cycle-of-water movement, from the time it falls on the land as rain or snow until it reaches the ocean, is evapo-transpiration, or consumptive use of water. This subject is increasingly significant, particularly in the irrigated regions of the West. It involves problems of water supply, both surface and underground, as well as those of the management and general economics of irrigation projects. It has become a highly important factor in the arbitration of controversies over major stream systems in which the public welfare of valleys, states, and even nations is involved. One such stream is the Pecos River, a tributary of the Rio Grande. Before the available water resources of a drainage basin in arid and semi-arid regions can be satisfactorily ascertained, careful consideration must be given to the consumptive-use requirements for water in various sub-basins. In the Pecos River Basin Investigation, therefore, the principal duty assigned to the Division of Irrigation, Soil Conservation Service, was the ascertainment of the |
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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] : California exhibits. |