| Simulation of dike-break processes in the Yellow River |
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| 引用本文： | 梁林,倪晋仁,A.G.L.Borthwick,B.D.Rogers. Simulation of dike-break processes in the Yellow River[J]. 中国科学E辑(英文版), 2002, 45(6): 606-619. DOI: 10.1360/02ye9069 |
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| 作者姓名： | 梁林 倪晋仁 A.G.L.Borthwick B.D.Rogers |
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| 作者单位： | Department of Engineering Science，Oxford University，Parks Road，Oxford OX1 3PJ，U.K.，Department of Engineering Science，Oxford University，Parks Road，Oxford OX1 3PJ，U.K. |
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| 基金项目： | This work was supported by the National Natural Science Foundation of China (Grant No. 59890200)，Ministry of Water Resources of China. |
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| 摘 要： | Although dike-break and dam-break processes have similar unsteady and discontinuous hydrodynamic characteristics, there are significant differences. In general, dam-break simulations focus on the flood discharge, whereas dike-break simulations are required to provide detailed information on the hydraulic and breach evolution processes, such as pit-scour and breach-expansion. In order to overcome the difficulties inherent in applying existing dam-break models to dike-breaks, this paper presents an integrated model that combines the shallow water, sediment transport, riverbed deformation and breach-expansion equations. A Godunov-type finite volume method is used for the flow simulation, based on a fixed quadtree grid system. The hydro-dynamic aspects of the model are validated for an idealized rectangular dam break. A representative reach in the Yellow River is selected at a location where there is a significant risk of a dike-break, and full-scale topographic and hydrologic data are available. Typical di
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Simulation of dike-break processes in the Yellow River |
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| Liang Lin,Ni Jinren,A. G. L. Borthwick,B. D. Rogers. Simulation of dike-break processes in the Yellow River[J]. Science in China(Technological Sciences), 2002, 45(6): 606-619. DOI: 10.1360/02ye9069 |
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| Authors: | Liang Lin Ni Jinren A. G. L. Borthwick B. D. Rogers |
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| Affiliation: | 1. Department of Environmental Engineering, Peking University, Beijing 100871, China;The Key Laboratory of Water and Sediment Sciences, Ministry of Education, Beijing 100871, China
2. Department of Engineering Science, Oxford University, Parks Road, Oxford OX1 3PJ, U.K. |
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| Abstract: | Although dike-break and dam-break processes have similar unsteady and discontinuous hydrodynamic characteristics, there are significant differences. In general, dam-break simulations focus on the flood discharge, whereas dike-break simulations are required to provide detailed information on the hydraulic and breach evolution processes, such as pit-scour and breach-expansion. In order to overcome the difficulties inherent in applying existing dam-break models to dike-breaks, this paper presents an integrated model that combines the shallow water, sediment transport, riverbed deformation and breach-expansion equations. A Godunov-type finite volume method is used for the flow simulation, based on a fixed quadtree grid system. The hydro-dynamic aspects of the model are validated for an idealized rectangular dam break. A representative reach in the Yellow River is selected at a location where there is a significant risk of a dike-break, and full-scale topographic and hydrologic data are available. Typical dike-break processes are successfully simulated, with predicted hydraulic characteristics and terrain changes qualitatively in agreement with laboratory data. The modeling study is of practical importance for implementation of engineering countermeasures in the Yellow River, such as breach blocking and head wrapping. |
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| Keywords: | Yellow River dike-break shallow water Godunov finite volume breach |
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