Analysis of landslide dams induced by the 2008 Wenchuan earthquake

doi:10.1016/j.jseaes.2012.06.002

	Analysis of landslide dams induced by the 2008 Wenchuan earthquake
	Fan, Xuanmei 1,2; van Westen, Cees J.2; Xu, Qiang 1; Gorum, Tolga 2; Dai, Fuchu 3
刊名	JOURNAL OF ASIAN EARTH SCIENCES
	2012-09-05
卷号	57 页码:25-37
关键词	Landslide dam Wenchuan earthquake Quake lake Failure rate
ISSN号	1367-9120
DOI	10.1016/j.jseaes.2012.06.002
文献子类	Article
英文摘要	Landslide dams caused by earthquakes are extremely hazardous disruptions of the flow of water and sediment in mountain rivers, capable of delivering large outburst floods that may devastate downstream areas. We analyzed a unique inventory of 828 landslide dams triggered by the M-w 7.9 2008 Wenchuan tectonic earthquake, China, constituting similar to 1.4% of the >60,000 coseismic slope failures mapped and attributed to this event. While 501 landslides blocked the rivers completely, the remainder caused only partial damming or channel diversion. The spatial distribution of landslide dams follows the same trend of that of the total landslide distribution, with landslide dams being most abundant in the steep watersheds of the hanging wall of the Yingxiu-Beichuan Thrust Fault, and in the northeastern part of the strike-slip fault near Qingchuan. Besides the co-seismic landslide density, the river width also played a key role in determining the landslide dam formation. Narrow rivers are more prone to be dammed than the wide rivers. The correlation between river width and landslide dam volume follows a linear relation, which can be used to roughly estimate the dam formation possibility. However, the applicability of this correlation needs to be validated in other regions. The decay (failure) rate of dams, defined here as the percentage of the number and area of landslide dams that have failed over time, shows that similar to 25% of dams accounting for similar to 30% of total landslide dam area failed one week after the earthquake. These percentages increased to similar to 60% within 1 month, and to >90% within 1 year. The geomorphometric parameters were analyzed, revealing power-law relations between landslide area and dam width, landslide source area and dam area, as well as lake area and lake volume. The inventory presented in this study will enrich the worldwide earthquake-induced landslide dam database and will also contribute to a better understanding of the post-earthquake dam decay. (C) 2012 Elsevier Ltd. All rights reserved.
WOS关键词	NEW-ZEALAND ; KASHMIR EARTHQUAKE ; NORTHERN PAKISTAN ; NATURAL DAMS ; FAILURE ; SUSCEPTIBILITY ; CHINA ; RIVER ; DISCHARGE ; INCISION
WOS研究方向	Geology
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000308782000005
资助机构	National Natural Science Foundation of the People's Republic of China(41130745) ; National Natural Science Foundation of the People's Republic of China(41130745) ; Ministry of Education of China(IRT0812) ; Ministry of Education of China(IRT0812) ; United Nations University - ITC Centre for Spatial Analysis and Disaster Risk Management of the University of Twente the Netherlands ; United Nations University - ITC Centre for Spatial Analysis and Disaster Risk Management of the University of Twente the Netherlands ; National Natural Science Foundation of the People's Republic of China(41130745) ; National Natural Science Foundation of the People's Republic of China(41130745) ; Ministry of Education of China(IRT0812) ; Ministry of Education of China(IRT0812) ; United Nations University - ITC Centre for Spatial Analysis and Disaster Risk Management of the University of Twente the Netherlands ; United Nations University - ITC Centre for Spatial Analysis and Disaster Risk Management of the University of Twente the Netherlands ; National Natural Science Foundation of the People's Republic of China(41130745) ; National Natural Science Foundation of the People's Republic of China(41130745) ; Ministry of Education of China(IRT0812) ; Ministry of Education of China(IRT0812) ; United Nations University - ITC Centre for Spatial Analysis and Disaster Risk Management of the University of Twente the Netherlands ; United Nations University - ITC Centre for Spatial Analysis and Disaster Risk Management of the University of Twente the Netherlands ; National Natural Science Foundation of the People's Republic of China(41130745) ; National Natural Science Foundation of the People's Republic of China(41130745) ; Ministry of Education of China(IRT0812) ; Ministry of Education of China(IRT0812) ; United Nations University - ITC Centre for Spatial Analysis and Disaster Risk Management of the University of Twente the Netherlands ; United Nations University - ITC Centre for Spatial Analysis and Disaster Risk Management of the University of Twente the Netherlands
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/84342]
专题	中国科学院地质与地球物理研究所
通讯作者	Fan, Xuanmei
作者单位	1.Chengdu Univ Technol, State Key Lab Geohazards Prevent & Geoenvironm Pr, Chengdu, Sichuan, Peoples R China 2.Univ Twente, Fac Geoinformat Sci & Earth Observat ITC, NL-7500 AE Enschede, Netherlands 3.Chinese Acad Sci, Inst Geol & Geophys, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Fan, Xuanmei,van Westen, Cees J.,Xu, Qiang,et al. Analysis of landslide dams induced by the 2008 Wenchuan earthquake[J]. JOURNAL OF ASIAN EARTH SCIENCES,2012,57:25-37.
APA	Fan, Xuanmei,van Westen, Cees J.,Xu, Qiang,Gorum, Tolga,&Dai, Fuchu.(2012).Analysis of landslide dams induced by the 2008 Wenchuan earthquake.JOURNAL OF ASIAN EARTH SCIENCES,57,25-37.
MLA	Fan, Xuanmei,et al."Analysis of landslide dams induced by the 2008 Wenchuan earthquake".JOURNAL OF ASIAN EARTH SCIENCES 57(2012):25-37.