Hydropower projects are one of the major basic projects that supply clear energy resource for the development of national economy. At present, in China's mainland, the total capacity of hydro-power that can be explored economically is around 400 million kW. Hydro-power stations that are constructed, are under construction and in the pre-feasibilty study and in feasibility study can also generate a capacity of around 300 million kW electric-powers. The capacity of hydropower stations that have been construct...