枕头坝一级水电站竖缝式鱼道过鱼效果初探

Preliminary Study on Fish Passing Effect of the Vertical-slot Fishway in Zhentouba Ⅰ Hydropower Station

采用视频监测装置记录了枕头坝一级水电站鱼道2017年4月~7月鱼道内的鱼类种类、数量及体长,并分析了其时间节律以及鱼道出口水位对过鱼效果的影响;还在2017年8月采用PIT标记跟踪的方式对鱼道的通过性进行了评估。鱼道视频监测共观察到鱼类407尾,共计20种。鱼道内鱼类上溯呈现明显的时间节律。鱼道的过鱼数量与鱼道内水位密切相关,出口水深为1.5~2.0 m时,过鱼效果最佳。PIT标记试验结果显示,标记鱼类齐口裂腹鱼、重口裂腹鱼等可顺利通过鱼道。该鱼道可为多种鱼类提供上溯通道,具备一定的过鱼功能。

The species,number and body length of fishes that appeared in the fishway of Zhentouba Ⅰ Hydropower Station between April 2017 to July 2017 are recorded by video monitoring device,and the influences of time rhythm and water level at the exit of fishway on fish passing are analyzed. The passive integrated transponder（ PIT） is also used in August 2017 to evaluate the efficiency of fish passing. Totally 407 fishes representing 20 species are observed in fish passing video. The fish appeared in fishway presents an obvious time rhythm. Water depth in fishway had an important influence on fish passing effect,which displays a largest fish passing at a water depth of 1. 5-2. 0 m. the results of PIT reveal that the fishes including Schizothorax prenanti and Schizothorax davidi can pass the fishway successfully. The fishway in Zhentouba I Hydropower Station can provide a migration passage for a variety of fishes.