Scale amplification of natural debris flows caused by cascading landslide dam failures

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > 山地灾害与地表过程重点实验室

	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.
刊名	GEOMORPHOLOGY
	2013-01-15
卷号	182 页码:173-189
关键词	Debris flow Cascading failure Landslide dam Scale amplification Zhouqu
ISSN号	0169-555X
通讯作者	Cui, P .
英文摘要	Debris 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.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Geography, Physical ; Geosciences, Multidisciplinary
研究领域[WOS]	Physical Geography ; Geology
关键词[WOS]	EARTHQUAKE-INDUCED LANDSLIDES ; NEW-ZEALAND ; 3-DIMENSIONAL TERRAIN ; CHINA ; JAPAN ; ALPS
收录类别	SCI
语种	英语
WOS记录号	WOS:000314328800014
公开日期	2013-06-24
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/5461]
专题	成都山地灾害与环境研究所_山地灾害与地表过程重点实验室
作者单位	1.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
推荐引用方式 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.