摘要详情
337 / 2024-02-29 17:07:57
The research of the response patterns of the lower Yellow River and the middle Yangtze River to the mega-dams
Yellow River,Yangtze River,Dam construction,Response model,Spatial and temporal erosion and deposition
摘要录用
Mega-dams play a significant role in the Yellow River and Yangtze River, but also bring about complex disturbances. In this paper, we identified the similarities and differences in the response of the lower Yellow River to Xiaolangdi dam and the middle reaches of the Yangtze River to Three Gorges Dam. The analysis of data from the last two decades provides a more comprehensive comparison of water and sediment entering and leaving the reservoirs, studying the impact of the two dams in regulating water and sediment. Additionally, the study compared the evolution of the channel morphology below the dams, including the vertical, lateral and longitudinal adjustments of the riverbed, combined with the alluvial phase space model. The downstream widening was drastic at Xiaolangdi dam, while deepening was the dominant change downstream of Three Gorges Dam. Coarsening has been prohibited downstream migration below Three Gorges Dam, but it played a limited role at the Yellow River. Using the delayed response model and the one-dimensional mathematical model, we successfully simulated the spatial and temporal erosion and deposition processes, and compared the erosion centers of the two river reaches. We have proposed a general model for the response of the Yellow River and Yangtze River to dam constructions. And to develop it, we collected response models of large rivers to dams from around the world and proposed path models for different response. This allows for the simulation of spatial and temporal erosion and deposition in response to the dam constructions by different streams and provides a method for trend prediction.
重要日期
-
会议日期
10月14日
2024
至10月17日
2024
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09月30日 2024
初稿截稿日期
-
10月17日 2024
注册截止日期
主办单位
国际水利与环境工程学会亚太地区分会
承办单位
长江水利委员会长江科学院
四川大学
四川大学
联系方式
- Congress Secretariat
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