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Show -2- This definition has been found satisfactory for use in many reports since 1935.2 3 4 In 1939 it was adopted with minor changes by the Committee on Irrigation of the American Society of Agricultural Engineers and is now in general use by engineers. Other Interpretations.-Although evaporation and transpiration have been studied for more than 200 years, the term consumptive use probably was not applied to water consumption prior to 1900. Many of the writings concerning the consumptive use of water are in the form of unpublished engineering reports. The term consumptive use, as originally applied to irrigation, was defined as a seasonal loss of water in acre-feet per acre irrigated. Among the first published writings dealing directly with the consumptive use, a report of an ASCE committee in 1930 is noteworthy.5 The committee proposed certain definitions for consumptive use of water in a basic sense, and also for the farm, the project, and the valley. It also reviewed previous estimates of consumptive use for large river systems and made reference to 24 articles, published 2"Water Utilization, Upper Rio Grande Basin," by Harry F. Blaney, Paul A. Ewing, O. W. Israelsen, Carl Rohwer, and F. C. Scobey, National Resources Committee, Washington, D. C, February, 1938, Part III. 3"Consumptive Use of Water in the Irrigated Areas of Upper Colorado River Basin," by Harry F. Blaney and Wayne D. Criddle, Div. of Irrigation and Water Conservation, Soil Conservation Service, U. S. Dept. of Agriculture, Logan, Utah, April, 1949. 4"Consumptive Water Use and Requirements: Report of the Participating Agencies, Pecos River," by Harry F. Blaney, Paul A. Ewing, Karl V. Morin, and Wayne D. Criddle, Joint Investigation of the National Resources Planning Board, Washington, D. C, June, 1942. 5"Consumptive Use of Water in Irrigation," Progress Report of the Duty of Water Committee of the Irrigation Division, Transactions, ASCE, Vol. 94, 1930, p. 1349. [California Exhibit No. 27.} |
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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. |