| OCR Text |
Show CALIFORNIA DEFENDANTS Exhibit No. 1236 Identification: July 15, 1957 Admitted Extract From israelsen, irrigation science, the foundation of Permanent Agriculture in Arid Regions, Second Annual Faculty Research Lecture, The Faculty Association, Utah State Agricultural College (1943). (pp. 14-15) Consumptive Use of Water In a basic sense the consumptive use of water is defined as the amount absorbed by the crop and transpired or used directly in building plant tissue, together with the amount evaporated. During the growing season water is transpired and evaporated. It is thus "consumed" from cropland, natural vegetation land, bare land, and water surfaces. The seasonal or annual water consumption depends on the crop, the temperature, humidity, wind, and other factors and varies considerably. The integration method of estimating consumptive use is explained by example. Assume, for instance a 1000-acre valley in which all the land is cropped; 600 acres to alfalfa and 400 to small grains, and assume that the alfalfa consumes 2 acre-feet of water each season and the grains 1 acre-foot. The total water consumed would then be 600 X 2 -j- 400 X 1, which equals 1600 acre-feet. Each valley has many different |
| Source |
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. |
