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Abstract：
The growth of indigenous fish resources in the source region of a river is dependent upon the protection and sustainable development of suitable habitats, and the dual effects of climate change and hydropower generation have a major impact on hydrodynamic conditions and living conditions in these habitats. Against a background of climate warming, an agent-based model was established using MIKE3 software and was applied to the source region of the Yellow River. Within the study area, water depth, flow velocity, water temperature, and fish distribution in fish habitats before and after implementation of an ecological scheduling scheme in the hydropower stations were compared. In this paper, the Weighted Usable Area (WUA) method was used to evaluate the habitat suitability before and after construction of the dam in order to study the impact of changes in the hydrology and water environment in the source area of the Yellow River on the survival of the indigenous fish Gymnocypris eckloni Herzensten, 1891 and its eggs, and appropriate solutions were proposed. The results showed that the spawning period of G. eckloni (Gymnocypris eckloni Herzensten) will be delayed and egg hatching will face higher risks due to the negative -effects of low water temperature caused by hydropower generation. Water warming induced by global warming is expected to eliminate this negative influence, and the inhabitable area for fish is expected to increase. This study can provide a reference for evaluating sustainable development of the whole river ecosystem under conditions of climatic change and hydropower engineering operations.
摘要：
河流源头地区土著鱼类资源的增长取决于适当栖息地的保护和可持续发展，气候变化和水力发电的双重影响对这些栖息地的水动力条件和生活条件产生了重大影响。在气候变暖的背景下，利用MIKE3软件建立了基于agent的模型，并将其应用于黄河源区。在研究区域内,水深,流速,水温,比较了水电站实施生态调度方案前后鱼类栖息地的鱼类分布。在本文中,采用加权可用面积(WUA)方法对大坝建设前后的生境适宜性进行评价，以研究黄河源区水文和水环境的变化对当地鱼类GymnocypriseckloniHerzensten生存的影响，1891年和它的蛋,并提出了相应的解决方案。结果表明，由于水力发电造成的低水温的负面影响，G.eckloni（GymnocypriseckloniHerzensten）的产卵期将被推迟，卵孵化将面临更高的风险。预计全球变暖引起的水变暖将消除这种负面影响，鱼类的可居住面积预计会增加。该研究可为气候变化和水电工程作业条件下全河生态系统的可持续发展评价提供参考。
