西藏DG水电站过鱼设施方案比选研究

Scheme Comparison and Selection of Fish Passage Facilities for DG Hydropower Station in Tibet

过鱼实施选型是过鱼设施设计中首要考虑的因素之一。选取工程造价(水头差)、地形地质条件、布置条件、运行管理、鱼类洄游习性和集鱼及过鱼效果6个因素,采用层次分析法对仿自然鱼道、技术型鱼道、升鱼机和集运鱼系统方案进行综合比选,比选结果推荐采用技术型鱼道方案。结合技术型鱼道各型式优缺点,工程河段鱼类生态习性,地质条件和鱼道集诱鱼段布置方式,最终推荐DG水电站过鱼设施采用右岸竖缝式鱼道方案。

The type selection is one of the most important factors in the design of fish passage facilities.Six indexes including engineering cost(water head),topographic and geological conditions,layout conditions,operation management,fish migration habits,and attraction and passage effectiveness are selected and the analytic hierarchy process(AHP)is applied to compare the schemes of natural-like fishway,technical fishway,fish lifter and fish collecting system.The comparison results recommend the scheme of technical fishway.Furthermore,combined with the advantages and disadvantages of different technical fishway type,the ecological habits of fish,the geological conditions,and the layout of fishway,the vertical slot fishway scheme on the right bank is finally proposed as the fish passage facility of DG Hydropower Station.