基于个体模型模拟的鱼类对上游水库运行的生态响应分析

建立了一维全河流和二维局部河段的水环境模型，并与基于个体的鱼类模型耦合，从鱼类种群动态角度研究水库运行对下游河流水生态系统的作用。文中选取了漓江下游的一段复式河道，以优势种草鱼和鲫鱼为研究对象，模拟了自然条件和水库调节作用下河道的水环境条件，以及相应的鱼类生长和分布的变化。通过模拟结果的对比分析，发现如果仅考虑水库运行造成的下游水流变化的作用，枯水期水库向河道补水对草鱼有一定的正面影响，对鲫鱼有轻微的负面影响；而在4—5月，水库运行对两种鱼类都存在比较明显的负面影响。本文建立的模型方法可为河流优化管理及水库生态友好运行提供支持。

Analysis on the downstream fish responses to reservoir operation using individual based model

Due to reservoir operation,mainly for flood control and hydropower generation,the flow regime in the downstream is dramatically altered,which imposes significant impacts on the aquatic ecosystem.To investigate the effects on fish population dynamics,this study developed a model that integrated a two-dimensional water quality module with individual-based fish module.The model was applied to a compound channel of the Lijiang River where the aquatic ecosystem has been largely affected by multiple reservoir ope...