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Determination of the suspension competence of debris flows based on particle size analysis
Yang, Hong-juan1,2; Wei, Fang-qiang2; Hu, Kai-heng2; Wang, Chuan-chang2
Corresponding AuthorFang-qiang WEI
2014
Source PublicationINTERNATIONAL JOURNAL OF SEDIMENT RESEARCH
ISSN1001-6279
Volume29Issue:1Pages:73-81
SubtypeArticle
AbstractThe determination of the critical particle size between solid and fluid phases, i.e., the suspension competence, is fundamental for debris flow. A method for determining suspension competence based on particle size analysis is presented in this paper. Suspension competence of static experimental water-debris mixtures prepared with the sediment of Jiangjia Gully is 0.025 mm if the bulk density is less than 1,800 kg m-3 and it increases with bulk density of more concentrated mixtures. Suspension competence of natural debris flows in Jiangjia Gully increases exponentially with the bulk density. These two data sets are compared in order to understand the suspension mechanism It is concluded that turbulence may play a leading role in particle suspension in non-viscous and sub-viscous debris flows, while in viscous debris flows both matrix strength and excess pore water pressure play important roles.
KeywordDebris Flow Suspension Competence Particle Size Analysis Critical Particle Size Particle Suspension Mechanism
Subject Area自然地理学
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine ; Physical Sciences
DOI10.1016/S1001-6279(14)60023-8
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WOS Subject ExtendedEnvironmental Sciences & Ecology ; Water Resources
Indexed BySCI
WOS KeywordGRANULAR-MATERIALS
Language英语
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WOS SubjectEnvironmental Sciences ; Water Resources
WOS IDWOS:000335125400007
Funding OrganizationNational Basic Research Program of China (973 Program)(2011CB409902) ; National Natural Science Foundation of China(41201011) ; Youth Talent Team Program of Institute of Mountain Hazards and Environment, CAS(SDSQB-2010-01)
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Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/7549
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, Peoples R China
2.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu, 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
Yang, Hong-juan,Wei, Fang-qiang,Hu, Kai-heng,et al. Determination of the suspension competence of debris flows based on particle size analysis[J]. INTERNATIONAL JOURNAL OF SEDIMENT RESEARCH,2014,29(1):73-81.
APA Yang, Hong-juan,Wei, Fang-qiang,Hu, Kai-heng,&Wang, Chuan-chang.(2014).Determination of the suspension competence of debris flows based on particle size analysis.INTERNATIONAL JOURNAL OF SEDIMENT RESEARCH,29(1),73-81.
MLA Yang, Hong-juan,et al."Determination of the suspension competence of debris flows based on particle size analysis".INTERNATIONAL JOURNAL OF SEDIMENT RESEARCH 29.1(2014):73-81.
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