摘要
若鱼道设计不当,进鱼口水深超高会影响诱鱼效果,从而降低鱼类上溯率。依托某实例工程建立鱼道整体数学模型,对鱼道流速、流态、水面线等进行研究,探究进鱼口水深超高时鱼道上下游允许水位差。研究发现,壅水工况,上游段水深与出鱼口水深一致,流速稳定,下游段水深开始缓慢增加直至达到进鱼口水深,流速随之减小,出现极小值;坡度越陡,出鱼口水深对允许水位差的影响越大,坡度相同时允许水位差和出鱼口水深呈正线性相关,随出鱼口水深增加,允许水位差变大;出鱼口水深越大,坡度对允许水位差的影响越小,出鱼口水深相同时允许水位差和坡度也呈正线性相关,坡度越陡,允许水位差越大。通过多元线性回归法,将试算数据整理为以坡度和出鱼口水深为自变量的允许水位差求解公式。研究成果可为大幅提高鱼道适应水位变动的能力提供技术支持。
If the water depth at the entrance of the fishway is too high,it will affect the effect of attracting fish,thus reducing the fish upstream rate.In order to investigate the allowable water level difference of the vertical slot fishway subject to the high inlet water depth,a quasi-integrated numerical model of the fishway was established based on a project.Flow velocity,flow pattern and surface line along the fishway were examined in this study.It is found that when the water depth at the inlet is high,the water depth in the upstream section is consistent with that of the outlet,and the flow velocity is stable.While the water depth at the downstream section starts to increase slowly until it reaches the water depth at the inlet,and the flow velocity then decreases and a very small value appears.The steeper the slope,the greater the influence of the outlet depth on the allowable water level difference.When the slope is the same,the allowable water level difference and the outlet depth are positively linearly related,the allowable water level difference becomes larger as the outlet depth increases.The greater the outlet depth,the smaller the influence of the slope on the allowable water level difference.When the outlet depth is the same,the allowable water level difference and the slope are also positively linearly related,and the steeper the slope,the larger the allowable water level difference.The allowable water level difference equation was compiled by multiple linear regression method,with slope and outlet depth as independent variables.These findings can provide implications for determination of the upstream and downstream design water level,and thus improve the fishway′s adaptation to different water level changes.
作者
缪婧娴
崔泉
辛沛
王晓刚
秦鑫
杨延东
熊定松
MIAO Jingxian;CUI Quan;XIN Pei;WANG Xiaogang;QIN Xin;YANG Yandong;XONG Dingsong(College of Water Conservancy and Hydropower engineering,Hohai University,Nanjing 210098,Jiangsu,China;Laluo Hydro-junction and Irrigation District Administration,Lhasa 850000,Tibet Autonomous Region,China;Nanjing Hydraulic Research Institute,Nanjing 210029,Jiangsu,China;Huaneng Lancang River Hydropower Co.,Ltd.,Kunming 650200,Yunnan,China)
出处
《水利水电技术（中英文）》
北大核心
2023年第S01期219-225,共7页
Water Resources and Hydropower Engineering
基金
国家重点研发计划课题“过鱼设施效果监测与评价技术体系研究”(2022YFC3204204)
江西省交通运输厅科技项目(2019C0004、2019C0005)
中央级公益性科研院所基本科研业务费专项资金(Y120009)。
关键词
竖缝式鱼道
整体模型
水力特性
水位差
vertical slot fishway
integrated model
hydraulic characteristics
water level difference
