IMECH-IR  > 流固耦合系统力学重点实验室
Coupled modelling of flood due to natural landslide dam breach
Huang W; Cao ZX; Yue ZY; Pender G; Zhou JF(周济福); Huang, W; Wuhan Univ, State Key Lab Water Resources & Hydropower Engn S, Wuhan 430072, Peoples R China.
Source PublicationPROCEEDINGS OF THE INSTITUTION OF CIVIL ENGINEERS-WATER MANAGEMENT
2012-11-01
Volume165Issue:10Pages:525-542
ISSN1741-7589
AbstractA coupled two-dimensional mathematical model is presented for a flood due to natural landslide dam breach. A new numerical algorithm is developed, preserving the well-balanced property between the flux and source terms of the momentum conservation equations over a mobile bed. It allows for the wetting-drying transition to be properly resolved. Equally importantly, the spatially variable size of the sediments of natural landslide dams is taken into account in estimating bed sediment entrainment flux. The model is first tested against flume experiments and then applied to a case study of the Tangjiashan landslide dam, the largest of its kind generated by the 2008 Wenchuan earthquake in Sichuan Province, China. Compared with field observations, the widening and deepening of the breach along with the flood hydrographs are reproduced fairly well by the present model as the heterogeneity of the dam material is incorporated. In contrast, when the heterogeneous composition of the natural landslide dam is ignored using a fixed sediment size, the model fails even if the parameters related to roughness, entrainment flux and mass collapse are largely tuned. An appropriate account of the heterogeneous composition of natural dams is therefore significant.
KeywordFloods & Floodworks Hydraulics & Hydrodynamics Mathematical Modelling Failure Simulation River Hydraulics Erosion China Lake
Subject Area环境流体力学
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Indexed BySCI ; EI
Language英语
WOS IDWOS:000310437200003
Funding OrganizationThis work is funded by National Key Basic Research and Development Program (973 Program) of China (grant 2007CB714106) and the Natural Science Foundation of China (grants 10932012 and 11172217). Special thanks are due to Dr D. Y. Zhong for supplying the observed field data and for his constructive suggestions.
DepartmentLMFS水环境流体力学(LEM)
Classification二类/Q2
Citation statistics
Cited Times:13[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/46655
Collection流固耦合系统力学重点实验室
Corresponding AuthorHuang, W; Wuhan Univ, State Key Lab Water Resources & Hydropower Engn S, Wuhan 430072, Peoples R China.
Recommended Citation
GB/T 7714
Huang W,Cao ZX,Yue ZY,et al. Coupled modelling of flood due to natural landslide dam breach[J]. PROCEEDINGS OF THE INSTITUTION OF CIVIL ENGINEERS-WATER MANAGEMENT,2012,165(10):525-542.
APA Huang W.,Cao ZX.,Yue ZY.,Pender G.,Zhou JF.,...&Wuhan Univ, State Key Lab Water Resources & Hydropower Engn S, Wuhan 430072, Peoples R China..(2012).Coupled modelling of flood due to natural landslide dam breach.PROCEEDINGS OF THE INSTITUTION OF CIVIL ENGINEERS-WATER MANAGEMENT,165(10),525-542.
MLA Huang W,et al."Coupled modelling of flood due to natural landslide dam breach".PROCEEDINGS OF THE INSTITUTION OF CIVIL ENGINEERS-WATER MANAGEMENT 165.10(2012):525-542.
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