Page 8


Page 8
Water from the Colorado River
Is Part Of,8
Full text
Why We Need the Water Cities of the Coastal Plain of Southern California are today securing water from three sources; First. Annual rainfall and the runoff from the mountain snow crops. Second. Underground water supplies which accumulated in this area during the countless centuries before man began to develop this region. Third. Owens River and the Mono Basin, water supply source for the City of Los Angeles, now in course of development. All of these three water sources combined are incapable of meeting safely the water needs of these cities beyond the time it will require to make Colorado River water available. At the present time, Southern California is using all of the available annual rainfall and, in addition, is drawing off its underground water supplies to make up the balance. Underground water supplies in the Southern California Coastal Plain are contained in three major basins or watersheds —the Los Angeles, San Gabriel and Santa Ana Rivers. Each of these river basins are broken up into a number of sub-basins, there being more than 30 such "water pockets" in all. Careful studies of each basin and sub-basin have been carried forward for many years. Water levels in every section of Southern California have been systematically charted. The amounts of water coming into these basins have been measured, as have the quantities being extracted. A few of these sub-basins are holding their own, but in the Coastal Plain, as a whole, the water levels are rapidly and continuously dropping. The theory that a series of wet years will restore the water levels is exploded by Page SEVEN

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