河海大学学报（自然科学版）2025，Vol.53Issue(6)：82-89,165,9.DOI:10.3876/j.issn.1000-1980.2025.06.010
拉洛鱼道过鱼效果量化评价及适宜过鱼条件研究
Quantitative assessment of fish-passing efficiency and optimal conditions in the Laluo Fishway
摘要
Abstract
To quantitatively assess the fish-passing efficiency in the Laluo Fishway and identify its optimal environmental conditions,on-site observations of the flow field,water temperature,and number of passing fishes were conducted in the Laluo Fishway.A two-dimensional mathematical model of the Laluo Fishway was constructed and verified to obtain more detailed flow field data,and the diurnal and seasonal rhythms of fish-passing were analyzed.The results indicate that the Laluo Fishway experienced a fish-passing peak in April,May and July.Flow velocity is the key factor influencing fish-passing efficiency.The average flow velocity at the vertical slot between 74.8%and 81.2%of the target species wuimming speed is the most favorable condition for their upstrean migration.Water temperature is also identified as a significant factor,positively correlated with the upstream migration behavior of fishes.Futhermore,a significant threshold effect is observed with a recommendation to maintain water temperatures above 8℃.Additionally,Flow has a relatively small impact on fish behavior.A flow rate in the range of 0.4-0.8 m3/s is determined to be most favorable for fish-passing.关键词
过鱼效果/鱼道优化/竖缝式鱼道/水力特性/整体模型/拉洛鱼道Key words
fish-passing efficiency/fishway optimization/vertical-slot fishway/hydraulic characteristic/integrated model/the Laluo Fishway分类
建筑与水利引用本文复制引用
刘顺然,王晓刚,郭修云,辛沛..拉洛鱼道过鱼效果量化评价及适宜过鱼条件研究[J].河海大学学报（自然科学版）,2025,53(6):82-89,165,9.基金项目
国家重点研发计划项目(2022YFC3204200) （2022YFC3204200）
