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Experimental study on the triggering mechanisms and kinematic properties of large debris flows in Wenjia Gully
Zhou, Gordon G. D.1,2,3; Cui, R.1,2,3; Tang, J. B.1,2,3; Chen, H. Y.1,2,3; Zou, Q.4; Sun, Q. C.5
Corresponding AuthorZhou GD
2015
Source PublicationENGINEERING GEOLOGY
ISSN0013-7952
EISSN1872-6917
Volume194Pages:52-61
SubtypeArticle
AbstractDebris flows are typically caused by natural terrain landslides triggered by intense rainfalls. If an incoming mountain torrent flows along sloping channels at high velocity, huge amounts of sediment (from landslide dams and eroded channel beds) will be entrained into the flows to form debris flows. It is likely that large debris flows are due to the failure of many landslide dams of different scales (due to bank slides or collapses), bed erosion, and solid transport. The catastrophic debris flows that occurred in Wenjia Gully (Wenchuan Earthquake Area), China on August 13, 2010 (two years after the mega earthquake), were caused by intense rainfall and the serious erosion of sloping channels. In the wake of the incident, experimental tests were conducted to better understand the process of sediment erosion and entrainment on the channel bed and the formation of debris flows. The results show that the bed erosion, bank collapses and channel widening caused by erosion accounted for the triggering and scale amplification of downstream debris flows in the Wenjia Gully event. This study illustrates how the hazardous process of natural debris flows can begin several kilometers upstream, and how such a complex cascade of geomorphic events (failure of landslide dams and erosion of the sloping bed) can lead to catastrophic discharges. Neglecting recognition of these hazardous geomorphic and hydrodynamic processes may result in high cost. (C) 2014 Elsevier B.V. All rights reserved.
KeywordDebris Flow Erosion Landslide Dam Wenjia Gully
Subject Area灾害学
WOS HeadingsScience & Technology ; Technology ; Physical Sciences
DOI10.1016/j.enggeo.2014.10.021
URL查看原文
WOS Subject ExtendedEngineering ; Geology
Indexed BySCI
WOS KeywordLANDSLIDE DAM ; CHANNEL ; HYDRAULICS ; CHINA ; EARTHQUAKE ; GEOMETRY ; FAILURE ; SICHUAN ; DEPTH ; JAPAN
Language英语
Quartile3区
TOP
WOS SubjectEngineering, Geological ; Geosciences, Multidisciplinary
WOS IDWOS:000360416400006
Funding OrganizationChinese Academy of Sciences(KZZD-EW-05-01) ; Institute of Mountain Hazards and Environment(SDSQB-2013-01) ; West Light Foundation of Chinese Academy of Sciences
Citation statistics
Cited Times:30[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/7535
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
4.Southwest Univ Sci & Technol, Coll Environm & Resource, Beijing, Peoples R China
5.Tsinghua Univ, State Key Lab Hydrosci & Engn, Beijing 100084, 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
Zhou, Gordon G. D.,Cui, R.,Tang, J. B.,et al. Experimental study on the triggering mechanisms and kinematic properties of large debris flows in Wenjia Gully[J]. ENGINEERING GEOLOGY,2015,194:52-61.
APA Zhou, Gordon G. D.,Cui, R.,Tang, J. B.,Chen, H. Y.,Zou, Q.,&Sun, Q. C..(2015).Experimental study on the triggering mechanisms and kinematic properties of large debris flows in Wenjia Gully.ENGINEERING GEOLOGY,194,52-61.
MLA Zhou, Gordon G. D.,et al."Experimental study on the triggering mechanisms and kinematic properties of large debris flows in Wenjia Gully".ENGINEERING GEOLOGY 194(2015):52-61.
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