San Gabriel River And Its Drainage Problems

San Gabriel River and its drainage problems In 1938, the San Gabriel Mountains (Los Angeles, USA) experienced heavy amounts of rain. This then take to mass movement, such as mudslides, and flash flooding, which flushed through with(predicate) downtown LA, damaging buildings, homes and vehicles. After these events, a flood perpetration was formed, and networks of hard defences were set up along the long visibleness of the San Gabriel River. The aim: decrease the hydrograph, and reduce the risk of flooding. In the focal ratio course of the San Gabriel River, the San Gabriel Dam was built.

This is a filtering dam, and uses sluice gates to interdict large boulders from progressing down river. By doing this, the amount of sediment in the river decreases, which reduces the possibility of flooding from high sediment yield, and in the baptismal font of a flood, at that place will be no detrimentally large sediment. Problems, however, are that the velocity of the river increased as there is less load to carry, which makes the erosion proces...If you want to get a full essay, order it on our website: Orderessay

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