江西水利电力大学学报2026，Vol.45Issue(1)：8-14,7.
水电站机组尾水区域鱼类分布及其对流场响应的初步观测
Preliminary observation of fish distribution in tailwater area of hydropower units and their response to flow fields
摘要
Abstract
To better protect the fish resources in the tailwater area of hydropower stations,this study employs hydroacoustic cruising surveys to conduct observations on fish distribution and flow fields in the tailwater area in March 2024,aiming to explore the characteristics of fish distribution and their response patterns to flow fields.The results show that 60 and 55 valid fish signals were detected in the two surveys,respectively.When only Unit 6 was in operation,the average fish body length,maximum volume density,and average volume density were all higher than those when all 6 units were shut down.In terms of spatial distribution,fish schools were uniformly distributed along the tailwater outlets when the units were shut down,while they concentrated in the backwater area downstream of the sill at the tailwater outlet during unit operation.For vertical dis-tribution,fish present a greater tendency to inhabit the deep water layer below 5 m(accounting for 85.5％)under the operat-ing condition.Flow field analysis indicates that unit operation altered the regional flow velocity gradient and circulation structure,and fish exhibited significant behavioral responses by adjusting their habitat positions and water layer selection to adapt to the changes in flow fields.The research results provide basic data for the optimization of hydropower station opera-tion and the protection of fish in the tailwater area.关键词
发电尾水/鱼类分布/流场分布/行为响应/水声学Key words
tailwater area/fish distribution/flow field distribution/behavioral response/hydroacoustics分类
农业科技引用本文复制引用
谭鋆,易万爽,朱世洪,金瑶,李娟,邹曦..水电站机组尾水区域鱼类分布及其对流场响应的初步观测[J].江西水利电力大学学报,2026,45(1):8-14,7.基金项目
国家重点研发计划项目(2022YFC3203905) （2022YFC3203905）
中国长江电力股份有限公司科研项目(Z152202018) （Z152202018）
