拉格朗德河位于加拿大魁北克省北部偏远地区,天气寒冷,人口稀少,交通不便,距用电中心1,100km。有5回73.5万V交流输电线路与蒙特利尔联接。该河千流长861km,流域面积9.8万km~3,年径流量536亿m~3。在干流下段500km范围内集中落差 Lagrange River is located in the remote north of Quebec, Canada, cold weather, sparsely populated, inaccessible, away from the electricity center 1,100km. There are 5 735,000 V AC transmission lines connected with Montreal. The stream is 861km long, with a catchment area of ​​98,000 km ~ 3 and an annual runoff of 53,600 million m3. In the lower reaches of the main stream within 500km concentration gap