干旱区生态环境知识资源中心(Arid): Topographical and geological variation of effective rainfall for debris-flow occurrence from a large-scale perspective

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DOI	10.1016/j.geomorph.2020.107134
	Topographical and geological variation of effective rainfall for debris-flow occurrence from a large-scale perspective
	Liu, Shuang 1,2; Wei, Li 1,2,3; Hu, Kaiheng 1,2
通讯作者	Hu, Kaiheng
来源期刊	GEOMORPHOLOGY
ISSN	0169-555X
EISSN	1872-695X
出版年	2020
卷号	358
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.
英文关键词	Debris flows Dimensionless effective rainfall Spatial heterogeneity Topographical and geological impacts
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000527307400019
WOS关键词	SHALLOW LANDSLIDES ; WENCHUAN EARTHQUAKE ; TRIGGERING RAINFALL ; HENGDUAN MOUNTAINS ; DURATION CONTROL ; TEMPORAL TRENDS ; THRESHOLDS ; INTENSITY ; IMPACT ; HAZARD
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/319282
作者单位	1.Chinese Acad Sci, Key Lab Mt Hazards & Earth Surface Proc, Chengdu 610041, Peoples R China; 2.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China; 3.Univ Chinese Acad Sci, Beijing 100049, 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],2020,358.
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.
MLA	Liu, Shuang,et al."Topographical and geological variation of effective rainfall for debris-flow occurrence from a large-scale perspective".GEOMORPHOLOGY 358(2020).