加拿大魁北克省北部詹姆斯湾地区拉格朗德河上,正在兴建目前世界上最大的地下水电站——拉格朗德Ⅱ电站(La GrandeⅡ)。拉格朗德河流域面积9.8万平方公里,平均年降水量750毫米,其中40%为降雪,多年平均流量1730立方米/秒,干流下游440公里内有落差360米。该河规划分四级开发,四座电站总 On the La Grande river in the James Bay area in northern Quebec, Canada, La Grande Ⅱ, the world’s largest underground hydropower plant, is under construction. La Grande river basin area of ​​98000 square kilometers, with an average annual rainfall of 750 mm, of which 40% is snowfall, the average annual flow of 1730 cubic meters / second, 440 kilometers downstream of the mainstream there is a gap of 360 meters. The river planning in four development, total four power plants