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Show CALIFORNIA DEFENDANTS Exhibit No. 1246 Identification: .................... Admitted: July 12, 1957 Extract From Blaney, Consumptive Use of Water Proceedings, American Society of Civil Engineers, Volume 77, Separate No. 91 (1951). (pp. 2-4) Definitions and Some Interpretations Definition of Consumptive Use.-In some instances there has been confusion as to the meaning of terms employed in reports on the use of water. Such terms as consumptive use, evapo-transpiration, transpiration, total evaporation, stream-flow depletion, water requirements, irrigation requirements, and duty of water have been interchanged. In this paper the terms "consumptive use" and "evapo-transpiration" are considered synonymous. They may be defined as: "The sum of the volumes of water used by the vegetative growth of a given area in transpiration and building of plant tissue and that evaporated from adjacent soil, snow, or intercepted precipitation on the area in any specified time, divided by the given area. If the unit of time is small, the consumptive use is expressed in acre-inches per acre or depth in inches, whereas, if the unit of time is large, such as a crop-growing season or a 12-month period, the consumptive use is expressed as acre-feet per acre or depth in feet or inches." |
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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. |