天生桥二级水电站引水防沙设计与运行效果

南盘江属于南方多沙河流，天生桥二级水电站首部进水口是低坝水库容水库取水，在天生桥一级水库建成之前能否解决好引水防沙难题，是工程建设成败的关键。通过选择较理想的坝址、利用一个开阔河弯的末端布置引水防水设施，深入研究水沙条件，优化防沙设施布置，开展泥沙模型试验验证，实行水库合理调度运行，较理想地达到了引水防水效果。

Design and Operation Effect of Sediment Prevention and Water Diversion on the Tianshengqiao Cascade-Ⅱ Hydropower Station

The head inlet of the Tianshengqiao Cascade-II Hydropower Station is located at a river bend of the Nanpan River,which is a sediment-laden river in the south of China.How to solve the problem of water diversion and sediment control is the key to construct the project successfully before the Tianshengqiao Cascade-I Hydropower Station is built.The intention of sediment prevention design is achieved ideally through these ways: selecting a suitable dam site and using water diversion and sediment control at the end of a wide river bend;analyzing flow and sediment thoroughly;optimizing the layout of sediment prevention;doing sediment model test;operating reservoir reasonably.