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西西调水方案是南水北调的西线工程。其位置在南水北调的西部,分别对雅鲁藏布江干流、尼洋河、易贡藏布和怒江建造水坝,壅高水位,通过各个独立引水系统与调水主隧洞连接,形成三个引水系统流入调水主隧洞的“并联”关系,隧洞总长690km。共计年调水800亿立方米,全程自流。调水目标主要是向我国西北部的新疆、青海、甘肃和内蒙西部调水,因此暂取名为“西西调水方案”。
Western water transfer program is the South-North Water Diversion project. It is located in the west of the South-to-North Water Diversion Project. The dams and high water levels are respectively built for the main Brahmaputra, the Niyang River, the Yigang Tsangpo and the Nujiang River and connected to the main water diversion tunnel through independent water diversion systems to form three diversion and diversion Tunnel “parallel” relationship, the total length of the tunnel 690km. Total annual water transfer 800 billion cubic meters, full of gravity. Water diversion goal is mainly to the northwestern part of our country Xinjiang, Qinghai, Gansu and western Inner Mongolia water transfer, so temporarily named “West-West water diversion program.”