The Yangtze River basin is the main source for water in the South-North water Diversion Project.
长江流域是南水北调工程的主要水源。
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Surface water-mostly rivers, lakes and reservoirs-will not flow from one basin into another without artificial diversion, and usually only with pumping.
The silting from a river with heavy sediment lood seriously affects the discharge capacity and effective life of the head work of a detention basin for flood diversion.