摘要
通过二维水力模拟软件,分析托口电站减水河段天然流量不同时期(丰、枯水期)与生态下泄流量下鱼类适宜栖息面积变化,以沅河镇段约3km长的河段为例,根据代表鱼类对水深、流速适应度的曲线,在不同工况下,计算出有效栖息地面积(WUA)。计算结果表明:托口水电站建设后生态流量状况下,相较于建设前的河道枯水期和丰水期,平均水深减小0.09m和0.59m,河道流速下降70.42%和86.45%,水域面积分别减少6.64%和16.22%;WUA分别减少64.50%和61.72%。
Based on the two-dimensional hydraulic simulation software,the change of fish suitable habitat area under different periods of natural flow(wet and dry periods)and ecological discharge in the water reducing reach of Tuokou hydropower station is analyzed.Taking the reach of about 3km in Yuanhe town as an example,according to the curve of fish's adaptability to water depth and velocity,the effective habitat area(WUA)is calculated under different conditions.The calculation results show that the average water depth is reduced by 0.09m and 0.59m,the flow velocity is reduced by 70.42%and 86.45%,the water area is reduced by 6.64%and 16.22%,and WUA is reduced by 64.50%and 61.72%,respectively,compared with the low water period and high water period before the construction of Tuokou hydropower station.
作者
翟立磊
Zhai Lilei(Datang Yuquhe Hydropower Development Co.,Ltd.,Chengdu Sichuan 610031,China)
出处
《环境与发展》
2020年第5期184-187,共4页
Environment & Development
关键词
生境模拟
鱼类栖息地
减水河段
有效栖息地面积
Habitat simulation
Fish habitat
Water reducing reach
Effective habitat area
