Water–sediment flow modeling for field case studies in Southwest China

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• 作者：Ridong Chen ; Songdong Shao ; Xingnian Liu
• 关键词：Water–sediment flow modeling ; Southwest China ; Flood ; Sediment ; Field study ; Polo Hydropower Plant ; Tangjiashan Mountain flood
• 刊名：Natural Hazards
• 出版年：2015
• 出版时间：September 2015
• 年：2015
• 卷：78
• 期：2
• 页码：1197-1224
• 全文大小：5,701 KB
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• 作者单位：Ridong Chen (1)
  Songdong Shao (2)
  Xingnian Liu (1)
  
  1. State Key Laboratory of Hydraulics and Mountain River Engineering, College of Water Resource and Hydropower, Sichuan University, Chengdu, 610065, China
  2. Department of Civil and Structural Engineering, University of Sheffield, Sheffield, S1 3JD, UK
  
• 刊物类别：Earth and Environmental Science
• 刊物主题：Earth sciences
  Hydrogeology
  Geophysics and Geodesy
  Geotechnical Engineering
  Civil Engineering
  Environmental Management
  
• 出版者：Springer Netherlands
• ISSN：1573-0840

文摘

This paper presents a highly robust numerical model to simulate water–sediment mixture flows in practical field studies. The model is composed of an integrated algorithm combining the finite element characteristic splitting method and finite volume Godunov scheme. The former maintains the generality and stability of the numerical algorithm, while the latter ensures the conservation and accuracy of the model. The proposed model is first tested by three benchmark flow problems including flood flow in a pool, dam break over a mobile bed, and morphological process of a dam removal. Then, the model is applied to two practical field case studies to demonstrate its potential engineering values. The first case study is related to the damage of the Polo Hydropower Plant by a sediment flooding event. The second one is the investigation of a well-known 2013 dam-break flooding that happened in the Tangjiashan Mountain. It is shown that the simulated water and sediment flows are in good agreement with the documented laboratory and field data, and the numerical model is capable of providing useful information on the flow predictions, thus making further engineering measures to mitigate these disasters.