Changes in riverbed morphology in the middle Yangtze River (Yichang-Chenglingji) after the construction of the Three Gorges Dam

被引：3
作者：
Lai, Xiaohe [1 ,5 ]
Jia, Jianping [1 ]
Hou, Yuebao [1 ]
Jiang, Jun [2 ]
Li, Maotian [3 ]
Chen, Jing [3 ]
Wei, Wen [4 ]
机构：
[1] Fuzhou Univ, Coll Civil Engn, Dept Water Resources & Harbor Engn, Fuzhou, Peoples R China
[2] Fujian Inst Geol Survey, Marine Geol Survey Inst, Fuzhou, Peoples R China
[3] East China Normal Univ, State Key Lab Estuarine & Coastal Res, Shanghai, Peoples R China
[4] Sun Yat sen Univ, Inst Estuarine & Coastal Res, Sch Marine Engn & Technol, State & Local Joint Engn Lab Estuarine Hydraul Tec, Guangzhou, Peoples R China
[5] Fuzhou Univ, Coll Civil Engn, Dept Water Resources & Harbor Engn, Room 304,Water Conservancy Hall,2,Wulong Jiangbei, Fuzhou 350108, Peoples R China
来源：
HYDROLOGICAL SCIENCES JOURNAL | 2023年 / 68卷 / 16期
基金：
中国国家自然科学基金;
关键词：
sand waves; riverbed evolution; Three Gorges Dam; midstream of the Yangtze River; SEDIMENT TRANSPORT; BED-LOAD; UNIFIED VIEW; CHANNEL; FLOW; ADCP; SAND; ADJUSTMENTS; ENVIRONMENT; DYNAMICS;
D O I：
10.1080/02626667.2023.2268069
中图分类号：
TV21 [水资源调查与水利规划];
学科分类号：
081501 ;
摘要：
The present study investigates the impact of the Three Gorges Dam (TGD) construction on riverbed morphology in the middle Yangtze River (YR). We analyse data collected on sand wave morphology, shallow surface topography, and section morphology after the completion of the dam. Specifically, we examine the spatial distribution characteristics of sand wave morphology and the riverbed evolution process in the Yicheng reach. Results reveal significant changes in the morphology of sand waves in the middle reach of the YR, with wavelengths ranging from 5.2124.15 to 5.0915.33 m in the upper and lower Jingjiang River, respectively. Additionally, sediment incipient velocity was found to be smaller than that of the sand wave, making it difficult for the sand wave to start as the bedload continued to coarsen. After impoundment, the riverbed is strongly scoured, the undercutting is serious, and the bed morphology changes dramatically.
引用
收藏
页码：2373 / 2387
页数：15
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