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Show PROBLEMS OF IMPERIAL VALLEY AND VICINITY. 3 a deep depression below sea level, is known as the Salton Basin and includes the Imperial Valley, of great extent and remarkable fertility, with a saline lake in the bottom, known as Salton Sea. The area of the drainage basin of the Colorado River, of approximately 244,000 square miles, is divided among the political divisions as follows: Table No. 2.-Drainage basin area by States. Square miles. Wyoming..,-----....................................................___ 19, 000 Colorado.....................................____...................'.. 39, 000 New Mexico....................................... -..................... 23, 000 Arizona.....................................,.......................... 103,000 Utah...................................t............................... 40,000 Nevada................................................................ 12,000 California............................•..-.___.___....................... 6,^000 Area in United States.................................................... 242,000 Area in Mexico...................................................,-'----. 2,000 Total............................................................. 244,000 Some of the areas in Arizona and California are very indefinite, owing to the absence of definite topographic divides, and the contributions of water from California and Mexico are negligible. The volume of contributory water from the different States, whilenot separately measured, is in the following order: Colorado, Utah, Wyoming, New Mexico, Arizona, Neyada, Mexico, and California. The various branches of the Colorado drain the following areas: Table No. 3.-Drainage basin area by stream basins. Square miles. Green River............................................................. 44,000 Upper Colorado (or Grand River)................................i.....,. 26,000 San Juan River...............j^v___«................^..- -V- - - - -.......- 26, 000 Fremont River...........r............................................. 4, 600 Paria_____...............................___.........................-. 1,400 Escalante.............................................................. 1, 800 Kanab.........................!r'....................................... 2, 200 Little Colorado.............................___,............'..___..... 26,000 Virgin..................j................,.............................. 11, 000 Miscellaneous..............................................___........ 44,000 Gila..............................,..................7.................. 57, 000 Total...............................................'........,..... 244,000 Area including San Juan and all al?ove.......___.........^............... 108,000 Above Boulder Canyon and below mouth of San Juan.__................. 53, 000 Below Boulder Canyon and above Gila....................-..-............ 24, 000 Gila River Basin........,............:................................. 57, 000 Total.............................................................- 242,000 SILT DEPOSIT DATA. The Colorado River and most of its tributaries have been for many centuries, and still are, eroding their beds and banks and carrying large quantities of sediment a part of which is deposited on the alluvial valleys during periods of overflow, and part reaches the Gulf of California where it is continually extending and enlarging its delta. Observations of silt carried have been taken periodically at Yuma just below the mouth of the Gila River for a long series of years and show an average annual amount by volume of 113,000 acre-feet, on |
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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] : |