水资源与水工程学报2025，Vol.36Issue(2)：93-100,108,9.DOI:10.11705/j.issn.1672-643X.2025.02.11
竖缝式鱼道主流蜿蜒度对草鱼上溯行为的影响研究
Mainstream sinuosity of vertical slot fishways affects grass carp upstream migration
摘要
Abstract
The vertical slot fishway is a widely adopted fish passage structure in both domestic and inter-national contexts,renowned for its efficient operation which is fundamentally dependent on superior hy-draulic characteristics within the pool.In this study,we initially employed numerical simulation tech-niques to analyze and optimize the design.Guided by the principle that the mainstream should be cen-tered within the pool with symmetrically distributed backflow areas,we selected three distinct layout con-figurations of the vertical slot fishway pool,each with varying degrees of mainstream sinuosity.Then,a physical model was constructed,utilizing grass carp(Ctenopharyngodon idella)as the target species for fish passage experiments.Comparative analyses were conducted to evaluate the upstream migration per-formance of grass carp across the three layout configurations.By integrating hydraulic performance metrics with the observed migration outcomes,we were able to recommend an optimal degree of mainstream sinu-osity for the vertical slot fishway pool.The numerical simulation results revealed that as the degree of ma-instream sinuosity increased,the scope of the mainstream expanded,the maximum attenuation of the ma-instream along the pathway increased,and the velocity gradient across the vertical slot cross-section in-tensified.Conversely,both the mainstream velocity and the vertical slot velocity decreased.From the perspective of the target species,the experimental results demonstrated that in Case Ⅱ,grass carp exhib-ited a concentrated upstream migration trajectory,a continuous migration process,reduced tail flick fre-quency,shorter migration time,and a higher success rate.Therefore,Case Ⅱ is recommended as the optimal pool chamber layout in this study.This research primarily explores three layout configurations of the vertical slot fishway pool with varying degrees of mainstream sinuosity and identifies the optimal lay-out.The findings can provide valuable guidance for the design and structural optimization of vertical slot fishways in practical engineering applications.关键词
竖缝式鱼道/上溯行为/蜿蜒度/草鱼/数值模拟/模型试验Key words
vertical slot fishway/upstream migration/sinuosity degree/grass carp(Ctenopharyngodon idella)/numerical simulation/model experiment分类
农业科技引用本文复制引用
石凯,孙双科,柳松涛,李广宁,郑铁刚,柳海涛..竖缝式鱼道主流蜿蜒度对草鱼上溯行为的影响研究[J].水资源与水工程学报,2025,36(2):93-100,108,9.基金项目
国家重点研发计划项目(2022YFC3204200) （2022YFC3204200）
