The main technical contents in this code include: collection and analysis of basic data, analysis of power supply area and power market, project task and demonstration of construction necessity, electric power and energy equilibrium, calculation of reservoir-stored energy, flood regulation, analysis of water amount, reservoir sediment scour and deposition & backwater calculation, comparison of alternatives, selection of installed capacity, selection of reservoir?characteristic water levels, comparison of unit type and number, selection of turbine rated head, economic comparison of waterway dimensions, initial impoundment plan, operation rule and benefit analysis.