关键词: 电站阻隔, 鱼类洄游, 竖缝式鱼道, 沙坪二级水电站

Abstract: The natural river will be blocked after the completion of Shaping II hydropower station. In order to mitigate the impact on fish migration, the vertical-slot fishway is adopted in engineering design. The fishway plans, namely on left bank, guide wall and right bank, are drawn up and compared from the aspects of geological conditions, construction conditions, fish passing effect, engineering investment, etc. The results show that although the geological conditions of fishway on left bank are complex and the investment is the largest, the entrance section is connected with the riverbank, which is the main gathering and migration area of fish. The fish passing effect is good and the operation and maintenance are simple. So the plan of fishway on the left bank is recommended for this project.

Key words: power station blocking, fish migration, vertical-slot fishway, Shaping II hydropower station