IMHE OpenIR  > Journal of Mountain Science  > Journal of Mountain Science-2015  > Vol12 No.3
Debris flow formation process and critical hydrodynamic conditions in the meizoseismal area of the Wenchuan earthquake
Wang Jun1,2,3; Yu Yan1,2,3; Pan Hua-li1,2; Qiao Cheng1,2,3; Ou Guo-qiang1,2
Corresponding AuthorPAN Hua-li
2015
Source PublicationJOURNAL OF MOUNTAIN SCIENCE
ISSN1672-6316
EISSN1993-0321
Volume12Issue:3Pages:699-710
SubtypeArticle
AbstractThe Wenchuan earthquake generated strong surface disturbances and triggered a large number of loose deposits, resulting in the disaster-prone environment with special watershed hydrological characteristics. This paper was to propose a debris flow formation process and explore the permeability characteristics and critical hydrodynamic conditions of the loose deposits triggered by the earthquake. The Guo Juanyan gully (31A degrees 05'27aEuro(3) N to 31A degrees 05'46aEuro(3) N, 103A degrees 36'58aEuro(3) E to 103A degrees 37'09aEuro(3) E) in Du Jiangyan City, located in the meizoseismal areas of the Wenchuan earthquake, was chosen as the study area and the disaster-prone environment was analyzed. The formation process of the debris flow was first proposed using a stability analysis, and then, the permeability characteristics of loose deposits were determined via in situ permeability experiments. Finally, the critical 1 h rainfall was simulated through a distributed hydrological model and verified by field observations. The formation process of debris flow could be divided into three stages based on the relationship between the hydrodynamic force and loose deposit resistance. The critical 1 h rainfall amounts under three antecedent moisture conditions (I-dry, II-normal and Ill-wet) were 52 mm/h, 43 mm/h and 34 mm/h, respectively. This study proposed a debris flow formation process in the meizoseismal areas of the Wenchuan earthquake based on the stability analysis and defined the rainfall threshold for debris flow early warning at the local level, which is significant for debris flow mitigation and risk management.
KeywordWenchuan Earthquake Debris Flow Disaster-prone Environment Permeability Characteristics Hydrodynamic Condition
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
DOI10.1007/s11629-014-3370-0
WOS Subject ExtendedEnvironmental Sciences & Ecology
Indexed BySCI
WOS KeywordRUNOFF
Language英语
Quartile4区
TOP
WOS SubjectEnvironmental Sciences
WOS IDWOS:000355429000016
Funding Organizationinternational cooperation project of the Ministry of Science and Technology(2013DFA21720) ; Key Laboratory of Mountain Hazards and Earth Surface Processes independent project funding ; National Natural Science Foundation(41372331)
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/9104
CollectionJournal of Mountain Science_Journal of Mountain Science-2015_Vol12 No.3
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
3.Univ Chinese Acad Sci, Beijing 100049, 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
Recommended Citation
GB/T 7714
Wang Jun,Yu Yan,Pan Hua-li,et al. Debris flow formation process and critical hydrodynamic conditions in the meizoseismal area of the Wenchuan earthquake[J]. JOURNAL OF MOUNTAIN SCIENCE,2015,12(3):699-710.
APA Wang Jun,Yu Yan,Pan Hua-li,Qiao Cheng,&Ou Guo-qiang.(2015).Debris flow formation process and critical hydrodynamic conditions in the meizoseismal area of the Wenchuan earthquake.JOURNAL OF MOUNTAIN SCIENCE,12(3),699-710.
MLA Wang Jun,et al."Debris flow formation process and critical hydrodynamic conditions in the meizoseismal area of the Wenchuan earthquake".JOURNAL OF MOUNTAIN SCIENCE 12.3(2015):699-710.
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