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Threshold criterion for debris flow initiation in seasonal gullies
Wang, Yang1,4; Cui, Peng1,3; Wang, Zhaoyin2; Liang, Shuangqing1,4
Corresponding AuthorWang, Yang
2017
Source PublicationINTERNATIONAL JOURNAL OF SEDIMENT RESEARCH
ISSN1001-6279
Volume32Issue:2Pages:231-239
SubtypeArticle
AbstractA series of flume experiments were done to investigate the effect of grain composition on the critical gradient and discharge of debris flows initiated in seasonal gullies. The results indicated that the critical gradient and discharge for debris flow initiation decrease initially, and then increase as the mass content of fine particles (< 2 mm) increases. As the mass content of fine particles increases, the angle of repose, permeability of widely graded gravel soils, and the incipient motion conditions of the coarse grains in non-uniform sediments decrease at first, and then increase. The mass content of fine particles of all inflection points is the same. The theoretical model based on the combination of hydrodynamic force and shear stress is more applicable to the prediction of the critical gradient for debris flow initiation. The critical discharge model considering the effect of non-homogeneity of the soil and the size of coarse and fine grains provides a more accurate prediction of debris flow initiation than other models based on the mean diameter. (C) 2017 International Research and Training Centre on Erosion and Sedimentation/the World Association for Sedimentation and Erosion Research. Published by Elsevier B.V. All rights reserved.
KeywordGrain Composition Seasonal Gully Non-uniform Sediment Debris Flow Initiation Critical Gradient Critical Discharge
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine ; Physical Sciences
DOI10.1016/j.ijsrc.2017.03.003
WOS Subject ExtendedEnvironmental Sciences & Ecology ; Water Resources
Indexed BySCI
WOS KeywordINCIPIENT SEDIMENT MOTION ; NONUNIFORM SEDIMENT ; WENCHUAN EARTHQUAKE ; HIGH SLOPES ; MECHANISMS ; LANDSLIDE ; CHANNEL ; RUNOFF ; CHINA ; TRANSPORT
Language英语
Quartile4区
TOP
WOS SubjectEnvironmental Sciences ; Water Resources
WOS IDWOS:000405496300010
Funding Organizationprogram of the Chinese Academy of Sciences(KZZD-EW-05-01) ; programs of the National Natural Science Foundation of China(41030742 ; 41190084)
Citation statistics
Cited Times:9[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/18882
Collection山地灾害与地表过程重点实验室
Affiliation1.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Hazards & Earth Surface Proc, Chengdu 610041, Peoples R China
2.Tsinghua Univ, Dept Hydraul Engn, Beijing 100084, Peoples R China
3.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
4.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, Yang,Cui, Peng,Wang, Zhaoyin,et al. Threshold criterion for debris flow initiation in seasonal gullies[J]. INTERNATIONAL JOURNAL OF SEDIMENT RESEARCH,2017,32(2):231-239.
APA Wang, Yang,Cui, Peng,Wang, Zhaoyin,&Liang, Shuangqing.(2017).Threshold criterion for debris flow initiation in seasonal gullies.INTERNATIONAL JOURNAL OF SEDIMENT RESEARCH,32(2),231-239.
MLA Wang, Yang,et al."Threshold criterion for debris flow initiation in seasonal gullies".INTERNATIONAL JOURNAL OF SEDIMENT RESEARCH 32.2(2017):231-239.
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