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Show CALIFORNIA DEFENDANTS Exhibit No.-1A4.4- A Identification:.................... Admitted: JUL.JL8J957 Extracts From Jacobs and Stevens, "Surplus Waters of the Colorado River System," a Joint Report to the Secretary of the Interior (December 31, 1927). (Pp. 9-10, 33, 34, 171, 174-75, 221a, 227-29, 231, 246- 47) [pp. 9-10] "13. The term 'consumptive use' has been used to designate the water lost annually from an area by plant usage and by evaporation from soil, plant, and water surfaces. For any given area it is the total inflow to that area, plus precipitation, plus the change in ground storage, minus the outflow from the area. The ground water factor over large areas is difficult of determination. It may be positive or negative depending on the direction of its fluctuation, but if irrigation has reached a stabilized condition, and drainage is effective, it may be assumed that over a series of years there is no final change. That factor, then, may be ignored in this study. It may also be assumed that the mean annual precipitation of the future will practically conform to that of the past; therefore, that term, too, may be ignored. When considering the change in consumptive use from virgin to cultural condition, there remains, then, only the difference between inflow and outflow as a measure of consumptive use. This difference, however, is not true consumptive use but is stream depletion resulting from cultural developments, and |
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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. |