Optimal Layout Design of Flood Discharge and Energy Dissipation of Thin Roller Compacted Arch Dam

Optimal design of Yunlonghe hydropower station is conducted to the layout of flood discharge and energy dissipation according to the consultant comments on preliminary design and topographic and geologic features of the dissipation area.In the optimal design,the original dam crest spillway drop bucket is changed to combination of flip bucket and drop bucket.In this way,water flows in layer in longitudinal direction and reduces unit width discharge of downstream energy dissipation area,thus the artificial concrete water cushion pond designed downstream of the dam is changed to a natural water cushion pond.The optimal design can solve the difficulty in arranging large drop flood discharge and energy dissipation in deep and narrow valley,ensure the safety of dam and save project investment and provide reference for similar projects.