期刊
JOURNAL OF HYDROLOGY-REGIONAL STUDIES
卷 40, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.ejrh.2022.101039
关键词
Coupling of hydrologic and hydrodynamic; processes; Three Gorges Reservoir area; Mid-lower reach of Yangtze River; Flow regime
资金
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDA23040500]
- Youth Innovation Promotion Association CAS [2021385]
- Central Guidance on Local Science and Technology Development Fund of Chongqing City [2021000069]
In this study, the effects of Three Gorges Dam operation on the streamflow in the Yangtze River basin were analyzed using a large-scale coupled model. The results showed that the impact of dam operation varied at different periods and locations.
Study region: The Yangtze River basin, China. Study focus: In this study, a large-scale coupled model of hydrological and hydrodynamic processes was developed via the Distributed Time Variant Gain Model and the hydrodynamics operation coupled model. Two scenarios including operated by the Three Gorges Dam (TGD) and natural condition hypothesis without the reservoir construction, were analyzed based on the coupled model to investigate the effects of TGD operation on the streamflow from 1970 to 2018. New hydrological insights: Results exhibited that the annual average relative deviation of flow operated by the TGD was approximately 24% compared with the natural state at Yichang, while the value of Chenglingji, Hankou, Hukou and Datong were 8.5~12.8%. During water supply period, the TGD operation increase the streamflow by 33% at Yichang, and the streamflow in downstream can gain about 6-17%. For impounding process, except Hukou, the others showed a decreasing trend, and the reduction ranged from about 7-20%. For flood season, the dam operation mainly intercepts high flood peaks while the average streamflow changes a little. The high flood peaks at Yichang can be reduced by 20%, and the changes of high flood peaks in downstream reduce to no more than 10% due to the influence of interval inflow. The deviations during drawdown period are almost below 10%.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据