Rainfall-induced landslides and debris flows in Mengdong Town, Yunnan Province, China

doi:10.1007/s10346-019-01336-y

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

	Rainfall-induced landslides and debris flows in Mengdong Town, Yunnan Province, China
	Yang, Hongjuan 1,2; Yang, Taiqiang 1,3; Zhang, Shaojie 1; Zhao, Fuhu 4; Hu, Kaiheng 1; Jiang, Yuhong 1
刊名	LANDSLIDES
	2020-01-03
卷号	17 期号:4 页码:931-941
关键词	Shallow landslide Multiple-occurrence regional landslide events Initiation mechanism Spatial distribution Forested slope Stream power
ISSN号	1612-510X
DOI	10.1007/s10346-019-01336-y
产权排序	1
文献子类	Article
英文摘要	On 2 September 2018, an intense rainstorm swept Mengdong Town in Yunnan Province of China, inducing a serious landslide and debris flow disaster with 10 deaths and 11 missing. Image interpretation, field survey, and slope stability analysis were used to examine the characteristics and initiation mechanism of this hazard. A total of 1774 landslide scars were identified, the area of which occupied 8.26% of the study region. Due to the spatial inhomogeneity of precipitation, these scars mainly concentrated along valleys in the lower part of the study area. Besides, well-forested hillslopes were more prone to landslides, indicating the limited role of trees in stabilizing slopes in extreme rainfall events. The initiation of landslides is mainly attributed to the week cohesion of the saturated clayey sand beneath the root zone, where the tensile resistance of roots was absent, and the increase of positive pore water pressure. Additionally, 288 landslide scars were situated adjacent to roads, demonstrating that the road construction activity had intensified the landslide disaster. Owing to the relatively low mobility of landslides, a considerable portion of landslide debris deposited on the valley floor in smaller watersheds (< 6.03 hm(2)), while the remaining portion entered high-order channels. In these channels, where stream power was relatively large, the woody debris and soil carried by landslides were entrained by streamflow, and debris flows were formed. Moreover, the magnitude of debris flow was amplified by the vertical and lateral erosion of the stream channel.
电子版国际标准刊号	1476-3567
WOS关键词	MECHANISMS ; VEGETATION
WOS研究方向	Engineering ; Geology
语种	英语
出版者	SPRINGER HEIDELBERG
WOS记录号	WOS:000505357900002
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/33759]
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
通讯作者	Zhang, Shaojie
作者单位	1.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Sichuan, Peoples R China; 2.Chinese Acad Sci, Key Lab Mt Hazards & Earth Surface Proc, Chengdu 610041, Sichuan, Peoples R China; 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China; 4.Chongqing Meteorol Observ, Chongqing 401147, Peoples R China
推荐引用方式 GB/T 7714	Yang, Hongjuan,Yang, Taiqiang,Zhang, Shaojie,et al. Rainfall-induced landslides and debris flows in Mengdong Town, Yunnan Province, China[J]. LANDSLIDES,2020,17(4):931-941.
APA	Yang, Hongjuan,Yang, Taiqiang,Zhang, Shaojie,Zhao, Fuhu,Hu, Kaiheng,&Jiang, Yuhong.(2020).Rainfall-induced landslides and debris flows in Mengdong Town, Yunnan Province, China.LANDSLIDES,17(4),931-941.
MLA	Yang, Hongjuan,et al."Rainfall-induced landslides and debris flows in Mengdong Town, Yunnan Province, China".LANDSLIDES 17.4(2020):931-941.