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Study on the Downstream Fish Responses to Reservoir Operations through an Individual-Based Model

机译:基于个体模型的下游鱼类对水库调度的响应研究

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Due to reservoir operations,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 the fish population dynamics,this study developed a model that integrated a two-dimensional water quality module with an individual-based fish module.The developed model was applied to a compound channel of the Lijiang River where the aquatic ecosystem has been largely affected by the Qingshitan reservoir in the upstream.The water quality module simulated the external forcing for the fish module and the fish module tracked the daily growth and movement of each individual fish.Two different species that are grass carp (Ctenopharyngodon idellus) and crucian carp (Carassius auratus) were modeled.The growth of fish lengths and weight were modeled by an empirical formula.The movement was determined by their preference to the water depth and flow velocity around.The model was verified by the historical fish survey data and the field observations conducted during the study.The research results can provide supports to optimize the reservoir operation schemes so that reduce their environmental impacts.
机译:由于水库的运行,主要是用于防洪和水力发电,下游的水流状况发生了巨大变化,这对水生生态系统产生了重大影响。为研究对鱼类种群动态的影响,本研究建立了一个模型二维水质模块和基于个体的鱼模块。将开发的模型应用于上游生态城滩水库对水生生态系统影响较大的丽江复合河道。强迫鱼组件和鱼组件跟踪每条鱼的日常生长和运动。对草鱼(Ctenopharyngodon idellus)和cru鱼(Carassius auratus)这两种不同的物种进行了建模,对鱼的长度和体重的增长进行了建模。通过经验公式,运动取决于它们对水深和周围流速的偏好。研究过程中进行的历史鱼类调查数据和实地观察证实了该酶的存在。研究结果可为优化水库调度方案提供支持,从而减少其对环境的影响。

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