IMHE OpenIR  > 山地灾害与地表过程重点实验室
Study on the rainfall and aftershock threshold for debris flow of post-earthquake
He Siming1,2; Li Dexin1,2; Wu Yong1,2; Luo Yu1,2
Corresponding AuthorHe, SM (何思明)
2011
Source PublicationJOURNAL OF MOUNTAIN SCIENCE
ISSN1672-6316
Volume8Issue:5Pages:750-756
SubtypeArticle
AbstractDue to the special condition of provenance and disaster environment after "5 center dot 12" Earthquake, the probability and conditions of the occurrence of gully debris flow change greatly after the event, which make it difficult to prevent disaster effectively. In this study the hydrological model of ground water table in loose sediment is established. According to infinite slope theory, the safety factor of deposits is defined as the ratio of resistance force to driving force. The starting condition of post-earthquake gully debris flow is clearly studied by analyzing the effects of rainfall intensity, seismic strength, slope gradient and mechanical properties on the balance of accumulation body. Then the formulas of rainfall and aftershock threshold for starting of gully debris flow are proposed, and an example is given to illustrate the effect of rainfall, aftershocks and their coupling action on a debris flow. The result shows the critical rainfall intensity decreases as the lateral seismic acceleration and channel gradient increases, while the critical intensity linearly increases as the friction angle increases.
KeywordEarthquake Hydrological Model Debris Flow Rainfall Threshold
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
DOI10.1007/s11629-011-2046-2
WOS Subject ExtendedEnvironmental Sciences & Ecology
Indexed BySCI
WOS KeywordINDUCED LANDSLIDES ; MODEL ; DURATION
Language英语
Quartile4区
TOP
WOS SubjectEnvironmental Sciences
WOS IDWOS:000294964500013
Funding OrganizationNational Technology Support Project(2011BAK12B03) ; National Natural Science Foundation of China(40872181)
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Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/5485
Collection山地灾害与地表过程重点实验室
Affiliation1.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
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
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GB/T 7714
He Siming,Li Dexin,Wu Yong,et al. Study on the rainfall and aftershock threshold for debris flow of post-earthquake[J]. JOURNAL OF MOUNTAIN SCIENCE,2011,8(5):750-756.
APA He Siming,Li Dexin,Wu Yong,&Luo Yu.(2011).Study on the rainfall and aftershock threshold for debris flow of post-earthquake.JOURNAL OF MOUNTAIN SCIENCE,8(5),750-756.
MLA He Siming,et al."Study on the rainfall and aftershock threshold for debris flow of post-earthquake".JOURNAL OF MOUNTAIN SCIENCE 8.5(2011):750-756.
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