Water Resources and Power

For large water retaining type hydropower stations, their flood discharge and energy dissipation generally have the characteristics of large discharge per unit width, low head, low Froude number, high submergence, large amplitude of upstream and downstream water level, which has a great impact on the flow regime in sluice chamber and downstream energy dissipation area, and may threaten the safety of sluice chamber and downstream. Therefore, the requirements for the operation mode of sluice gate are high. In this paper, combined with the Shaping Ⅱ HPP located on the Daduhe River, the flood discharge, energy dissipation, and operation mode of sluice gate for large water retaining type hydropower stations are studied in depth and systematically. Based on the hydraulic model test, the flood discharge and energy dissipation mode of broad-crested weir, apron and riprap is studied. The open evenly principles of the permanent sluice gate operation and the mode under various working conditions are put forward. The actual operation denmostrates that the flood discharge, energy dissipation, and operation mode of sluice gate are effective, and it has certain referential value to the similar projects.