Topographical and geological variation of effective rainfall for debris-flow occurrence from a large-scale perspective

doi:10.1016/j.geomorph.2020.107134

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

	Topographical and geological variation of effective rainfall for debris-flow occurrence from a large-scale perspective
	Liu, Shuang 1,3; Wei, Li 1,2,3; Hu, Kaiheng 1,3
刊名	GEOMORPHOLOGY
	2020-06-01
卷号	358 页码:107134
关键词	Debris flows Dimensionless effective rainfall Spatial heterogeneity Topographical and geological impacts
ISSN号	0169-555X
DOI	10.1016/j.geomorph.2020.107134
通讯作者	Hu, Kaiheng(khhu@imde.ac.cn)
产权排序	1
文献子类	Article
英文摘要	Understanding the spatial heterogeneity of the debris-flow rainfall threshold is meaningful for regional warning systems. However, regional topographical and geological impacts have not been well quantified. Using the Hengduan Mountains with distinct climatic, topographical, and geological settings as a typical study area, this study focused on the geological and topographical variations of effective rainfall for debris-flow occurrence from a large-scale perspective. Results showed that the probability of debris-flow occurrence was smallest in the cold-arid zone and largest in the humid zone. The mean dimensionless effective rainfall (the ratio of effective rainfall to mean annual precipitation) was about 5.2% for an initial warning and 7.7% for serious warnings. The contributions to the differences are regional climate, geomorphology, and geology, in sequence of importance. The zone with more complex terrain, thicker soil, and higher sand content would be more beneficial to debris-flow formation. Multiple regression analysis suggested that the geologically-related aspects may have a slightly greater effect than topographical factors on effective rainfall. In general, this work could be in favor of other similar regional, national, and even global work for debris-flow early warning. (C) 2020 Elsevier B.V. All rights reserved.
资助项目	National Key R&D Program of China[2018YFC1505205] ; National Natural Science Foundation of China[41790434] ; 135 Strategic Programof the Institute of Mountain Hazards and Environment, CAS[SDS-QN-1907]
WOS关键词	SHALLOW LANDSLIDES ; WENCHUAN EARTHQUAKE ; TRIGGERING RAINFALL ; HENGDUAN MOUNTAINS ; DURATION CONTROL ; TEMPORAL TRENDS ; THRESHOLDS ; INTENSITY ; IMPACT ; HAZARD
WOS研究方向	Physical Geography ; Geology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000527307400019
资助机构	National Key R&D Program of China ; National Natural Science Foundation of China ; 135 Strategic Programof the Institute of Mountain Hazards and Environment, CAS
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/34576]
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	Hu, Kaiheng
作者单位	1.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China; 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Key Lab Mt Hazards & Earth Surface Proc, Chengdu 610041, Peoples R China;
推荐引用方式 GB/T 7714	Liu, Shuang,Wei, Li,Hu, Kaiheng. Topographical and geological variation of effective rainfall for debris-flow occurrence from a large-scale perspective[J]. GEOMORPHOLOGY,2020,358:107134.
APA	Liu, Shuang,Wei, Li,&Hu, Kaiheng.(2020).Topographical and geological variation of effective rainfall for debris-flow occurrence from a large-scale perspective.GEOMORPHOLOGY,358,107134.
MLA	Liu, Shuang,et al."Topographical and geological variation of effective rainfall for debris-flow occurrence from a large-scale perspective".GEOMORPHOLOGY 358(2020):107134.