OCR Text |
Show -3- [pp. 63-64] 80. During the period from 1900 to 1918 the Rio Grande at Del Norte showed a discharge of 105.4 per cent of the average. Applying this to the grand average at the State Bridge gives a discharge of 578,000. Reducing this again by the 74,000 acre feet calculated reduction leaves an average outflow of 504,000 acre feet against an estimated inflow of 1,545,000 acre feet. The difference is due to evaporation from seeped lands and to useful consumption, the total being 1,041,000 acre feet. 81. The net present acreage of irrigated land is estimated at 376,000 in Table 6 of which 40,000 lies in the mountain valleys, leaving 336,000 acres in the main valley. A consumption of 1 acre foot has been ascribed to the mountain valleys. For the main valley where the season is longer, it is believed from various data from other ir- beneficial[*] rigated areas that the A consumptive use may be about 1.25 acre feet per acre. The beneficial use on this basis is Mountain Valley, 40,000 acres @ 1.00 a.f. = 40,000 af. Main Valley, 336,000 acres @ 1.25 a.f.......=420,000 " Total beneficial use ........................ 460,000 " Wasted Evaporation Inflow................................................................1,545,000 a.f. Outflow ............................................................ 504,000 " Used in valley............................1,041,000 " Beneficial use .................................................. 460,000 " Wasted evaporation ................ 581,000 " and possible filling of artesian basin. [*] [*]Italicized portion is inserted by hand in the typewritten text. |
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. |