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Scale amplification of natural debris flows caused by cascading landslide dam failures
Cui, P.1; Zhou, Gordon G. D.; Zhu, X. H.; Zhang, J. Q.
Corresponding AuthorCui, P .
2013
Source PublicationGEOMORPHOLOGY
ISSN0169-555X
EISSN1872-695X
Volume182Pages:173-189
SubtypeArticle
AbstractDebris flows are typically caused by natural terrain landslides triggered by intense rainfalls. If an incoming mountain torrent collapses a series of landslide dams, large debris flows can form in a very short period. Moreover, the torrent can amplify the scale of the debris flow in the flow direction. The catastrophic debris flows that occurred in Zhouqu, China, on 8 August 2010 were caused by intense rainfall and the upstream cascading failure of landslide dams along the gullies. In the wake of the incident, a field study was conducted to better understand the process of cascading landslide dam failures and the formation of debris flows. This paper looks at the geomorphic properties of the debris-flow gullies, estimates the peak flow discharges at different locations using three different methods, and analyzes the key modes (i.e., different landslide dam types and their combinations) of cascading landslide dam failures and their effect on the scale amplification of debris flows. The results show that five key modes in Luojiayu gully and two modes in Sanyanyu gully accounted for the scale amplification of downstream debris flows in the Zhouqu event. This study illustrates how the hazardous process of natural debris flows can begin several kilometers upstream as a complex cascade of geomorphic events (failure of landslide dams and erosion of the sloping bed) can scale to become catastrophic discharges. Neglecting recognition of these hazardous geomorphic and hydrodynamic processes may result in a high cost. (C) 2012 Elsevier B.V. All rights reserved.
KeywordDebris Flow Cascading Failure Landslide Dam Scale Amplification Zhouqu
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1016/j.geomorph.2012.11.009
WOS Subject ExtendedPhysical Geography ; Geology
Indexed BySCI
WOS KeywordEARTHQUAKE-INDUCED LANDSLIDES ; NEW-ZEALAND ; 3-DIMENSIONAL TERRAIN ; CHINA ; JAPAN ; ALPS
Language英语
Quartile2区
TOP
WOS SubjectGeography, Physical ; Geosciences, Multidisciplinary
WOS IDWOS:000314328800014
Funding OrganizationNational Basic Research Program of China (973 Program)(2011CB409902) ; Key Program of National Natural Science Foundation of China(41030742 ; Sichuan Youth Science and Technology Foundation(2012JQ0043) ; 41190084)
Citation statistics
Cited Times:97[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/5461
Collection山地灾害与地表过程重点实验室
Affiliation1.Chinese Acad Sci, Key Lab Mt Hazards & Earth Surface Proc, Chengdu, Peoples R China
2.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu, Peoples R China
3.Minist Water Conservancy & Power, Chengdu, Peoples R China
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
Cui, P.,Zhou, Gordon G. D.,Zhu, X. H.,et al. Scale amplification of natural debris flows caused by cascading landslide dam failures[J]. GEOMORPHOLOGY,2013,182:173-189.
APA Cui, P.,Zhou, Gordon G. D.,Zhu, X. H.,&Zhang, J. Q..(2013).Scale amplification of natural debris flows caused by cascading landslide dam failures.GEOMORPHOLOGY,182,173-189.
MLA Cui, P.,et al."Scale amplification of natural debris flows caused by cascading landslide dam failures".GEOMORPHOLOGY 182(2013):173-189.
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