摘要
在鱼类栖息地不断被压缩、鱼类原生境保护范围非常有限的背景下,采取一定的生态修复手段修复鱼类栖息地的结构和功能,显得非常必要。通过河道内流量增加法,采用二维River2D模型对水电站坝下齐口裂腹鱼产卵场进行模拟,根据对修复前后适宜产卵场面积的加权计算,分析修复前后栖息地的变化情况,为产卵场修复工程设计提供依据。模拟修复结果表明,地形重塑后,适宜齐口裂腹鱼产卵的水深、流速范围以及有效栖息地面积较修复前显著增加,地形重塑效果显著。
Under the context that fish habitat is being constantly compressed and the area of in-situ conservation is very limited, it is quite essential and critical to take ecological measures to restore the structure and functions of the fish habitat. By applying the instream flow incremental methodology, the spawning ground of Schizothorax prenanti located at the downstream of a hydropower dam is simulated by the model of River2D. Through the weighted calculation of areas of suitable spawning ground before and after restoration, changes of habitat is analyzed in order to provide basis for the design of habitat restoration project. The results of simulative restoration showed that after the terrain remolding, there are significant increase in the suitable water depth for spawning of Schizothorax prenanti, flow velocity area and the total weighted usable area.
出处
《环境影响评价》
2015年第3期29-32,共4页
Environmental Impact Assessment
关键词
河道内流量增加法
鱼类栖息地
模拟
修复
地形重塑
Instream Flow Incremental Methodology
fish habitat
restoration
simulation
terrain remolding
