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永定河倒虹吸是南水北调中线京石段应急供水工程(北京段)总干渠穿越永定河的建筑物,位于北京市丰台区永定河卢沟桥拦洪闸下游3.9km。倒虹吸穿大宁水库副坝,经大宁水库,穿永定河右堤、过永定河、穿永定河左堤及北京市西五环路至晓月园,全长2518.79m。其上游接大宁调压池,4孔穿过永定河,其中2孔下游接卢沟桥低压暗涵向团城湖供水,设计流量30m~3/s,加大流量为35m~3/s。2孔
Yongding River inverted siphon is the central Beijing South-to-North Water Diversion Project for Beijing-Shijiazhuang Emergency Water Supply Project (Beijing section) The main canal passes through Yongding River and is located 3.9km downstream of the Lugou Bridge in Yongding River, Fengtai District, Beijing. Inverted siphon Daning reservoir through the dams, Daning reservoir, wearing the Yongding River right bank, Yongding River, Yongding River left bank and the West Fifth Ring Road to the Aoyuan Park, a total length of 2518.79m. The upper reaches of the Daning surge tank, 4 holes through the Yongding River, including two holes downstream Lugou bridge low-pressure culverts culvert to the Lake City water supply, design flow 30m ~ 3 / s, increase the flow of 35m ~ 3 / s. 2 holes