Debris flows introduced in landslide deposits under rainfall conditions: The case of Wenjiagou gully

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 > Journal of Mountain Science > Journal of Mountain Science-2013 > Vol10 No.2

	Debris flows introduced in landslide deposits under rainfall conditions: The case of Wenjiagou gully
	Zhou Jia-wen 1,2; Cui Peng1 ; Yang Xing-guo 2; Su Zhi-man1 ; Guo Xiao-jun1
刊名	JOURNAL OF MOUNTAIN SCIENCE
	2013-04-01
卷号	10 期号:2 页码:249-260
关键词	Debris flow Rainfall Surface-water runoff Unsaturated seepage Physical modeling Numerical modeling
ISSN号	1672-6316
通讯作者	ZHOU Jia-wen
英文摘要	Debris flows often occur in landslide deposits during heavy rainstorms. Debris flows are initiated by surface water runoff and unsaturated seepage under rainfall conditions. A physical model based on an infinitely long, uniform and void-rich sediment layer was applied to analyze the triggering of debris-flow introduced in landslide deposits. To determine the initiation condition for rainfall-induced debris flows, we conducted a surface water runoff and saturated-unsaturated seepage numerical program to model rainfall infiltration and runoff on a slope. This program was combined with physical modeling and stability analysis to make certain the initiation condition for rainfall-introduced debris flows. Taking the landslide deposits at Wenjiagou gully as an example, the initiation conditions for debris flow were computed. The results show that increase height of surface-water runoff and the decrease of saturated sediment shear strength of are the main reasons for triggering debris-flows under heavy rainfall conditions. The debris-flow triggering is affected by the depth of surface-water runoff, the slope saturation and shear strength of the sediment.
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
类目[WOS]	Environmental Sciences
研究领域[WOS]	Environmental Sciences & Ecology
关键词[WOS]	RATES
收录类别	SCI
语种	英语
WOS记录号	WOS:000317352800008
公开日期	2013-04-26
内容类型	期刊论文
源URL	[http://192.168.143.20:8080/handle/131551/5215]
专题	成都山地灾害与环境研究所_Journal of Mountain Science _Journal of Mountain Science-2013_Vol10 No.2 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 610041, Peoples R China 2.Sichuan Univ, State Key Lab Hydraul & Mt River Engn, Chengdu 610065, Peoples R China
推荐引用方式 GB/T 7714	Zhou Jia-wen,Cui Peng,Yang Xing-guo,et al. Debris flows introduced in landslide deposits under rainfall conditions: The case of Wenjiagou gully[J]. JOURNAL OF MOUNTAIN SCIENCE,2013,10(2):249-260.
APA	Zhou Jia-wen,Cui Peng,Yang Xing-guo,Su Zhi-man,&Guo Xiao-jun.(2013).Debris flows introduced in landslide deposits under rainfall conditions: The case of Wenjiagou gully.JOURNAL OF MOUNTAIN SCIENCE,10(2),249-260.
MLA	Zhou Jia-wen,et al."Debris flows introduced in landslide deposits under rainfall conditions: The case of Wenjiagou gully".JOURNAL OF MOUNTAIN SCIENCE 10.2(2013):249-260.