Coupled modelling of flood due to natural landslide dam breach

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	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.
发表期刊	PROCEEDINGS OF THE INSTITUTION OF CIVIL ENGINEERS-WATER MANAGEMENT
	2012-11-01
卷号	165 期号:10 页码:525-542
ISSN	1741-7589
摘要	A 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.
关键词	Floods & Floodworks Hydraulics & Hydrodynamics Mathematical Modelling Failure Simulation River Hydraulics Erosion China Lake
学科领域	环境流体力学
URL	查看原文
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000310437200003
项目资助者	This 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.
课题组名称	LMFS水环境流体力学(LEM)
论文分区	二类/Q2
引用统计	被引频次：14[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/46655
专题	流固耦合系统力学重点实验室
通讯作者	Huang, W; Wuhan Univ, State Key Lab Water Resources & Hydropower Engn S, Wuhan 430072, Peoples R China.
推荐引用方式 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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