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〕 }} Owens Lake is a mostly dry lake in the Owens Valley on the eastern side of the Sierra Nevada in Inyo County, California. It is about south of Lone Pine, California. Unlike most dry lakes in the Basin and Range Province that have been dry for thousands of years, Owens held significant water until 1913, when much of the Owens River was diverted into the Los Angeles Aqueduct, causing Owens Lake to desiccate by 1926. Today, some of the flow of the river has been restored, and the lake now contains some water. Nevertheless, as of 2013, it is the largest single source of dust pollution in the United States. == History == Before the diversion of the Owens River, Owens Lake was up to long and wide, covering an area of up to . In the last few hundred years the lake had an average depth of , and sometimes overflowed to the south after which the water would flow into the Mojave Desert.〔 In 1905, the lake's water was thought to be “excessively saline.” It is thought that in the late Pleistocene about 11-12,000 years ago Owens Lake was even larger, covering nearly and reaching a depth of . The increased inflow from the Owens River, from melting glaciers of the post-Ice Age Sierra Nevada, caused Owens Lake to overflow south through Rose Valley into another now-dry lakebed, China Lake, in the Indian Wells Valley near Ridgecrest, California. After the glaciers melted, the lake waters receded, and this accelerated with human exploitation of the lake even before the Los Angeles Aqueduct was built, due to Owens Valley farmers who had already appropriated most of the Owens River's tributaries' flow, causing the lake level to drop slightly each year. Starting in 1913, the river and streams that fed Owens Lake were diverted by Los Angeles Department of Water and Power (LADWP) into the Los Angeles Aqueduct, and the lake level started to drop quickly. As the lake dried, soda processing at Keeler switched from relatively cheap chemical methods to more expensive physical ones. The Natural Soda Products Company sued the city of Los Angeles and built a new plant with a $15,000 settlement. A fire destroyed this plant shortly after it was built but the company rebuilt it on the dry lakebed in the 1920s. During the unusually wet winter of 1937, LADWP diverted water from the aqueduct into the lakebed, flooding the soda plant. Because of this the courts ordered the city to pay $154,000. After an unsuccessful appeal attempt to the state supreme court in 1941, LADWP built the Long Valley Dam, which impounded Lake Crowley for flood control.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Owens Lake」の詳細全文を読む スポンサード リンク
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