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Delta Cross Channel : ウィキペディア英語版
Delta Cross Channel

The Delta Cross Channel is a facility in California's Sacramento-San Joaquin Delta that diverts water from the Sacramento River. The facility was built in 1951 in Walnut Grove, California. It diverts water to Snodgrass Slough, from where it flows to the Mokelumne River, then to the San Joaquin River, towards the Bill Jones Pumping Plant,〔(【引用サイトリンク】url=http://www.sldmwa.org/about-sldmwa-facilities/delta-cross-channel/ )〕 which is the intake for the Delta-Mendota Canal, part of the Central Valley Project.〔(【引用サイトリンク】url=http://www.sldmwa.org/about-sldmwa-facilities/about-the-jones-pumping-plant/ )〕 The distance from the channel to the Jones Pumping Plant is about 50 miles.〔
The diversion is controlled by two sluice gates that each measure 60 ft by 30 ft and weigh 243 tons and extend 243 feet across the channel. The channel is 6000 feet long, has a bottom width of 210 feet, and was designed to divert a capacity of 3500 cubic feet per second under normal conditions, but can divert up to 6000 cfs.〔 The facility was built to augment the flow of the Sacramento River through the Delta to the Jones Pumping Plant.〔(【引用サイトリンク】url=http://www.watereducation.org/aquapedia/sacramento-san-joaquin-delta-cross-channel )〕 It ensures an adequate supply of water for the Jones Pumping Plant and irrigation supplies for the Sacramento-San Joaquin Delta while controlling ocean salinity.
The gates close when the river floods, specifically when the flow on the Sacramento River reaches 20,000 cubic feet per second, to prevent flooding on the San Joaquin River, and if the amount of water is so low that the Central Valley Project cannot deliver water. The gates also close during the winter to protect the fisheries in the Delta,〔 specifically the salmon fishery.〔 The winter closure of the facility was requested by a consortium of wildlife protection agencies, including the U.S. Fish and Wildlife Service, the National Oceanic and Atmospheric Administration, and the California Department of Fish and Wildlife.〔 The gates are generally open during the summer months.〔
==References==




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「Delta Cross Channel」の詳細全文を読む



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