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Prediction of impact force of debris flows based on distribution and size of particles
He, Siming1,2,3; Liu, Wei1,2; Li, Xinpo1,2
Corresponding AuthorLiu, Wei
2016
Source PublicationENVIRONMENTAL EARTH SCIENCES
ISSN1866-6280
EISSN1866-6299
Volume75Issue:4Pages:DOI 10.1007/s12665-015-5180-2
SubtypeArticle
AbstractA debris flow is a solid-liquid two-phase flow; the composition and gradation of the particles within have a significant influence on its impact force. This paper proposes a new method for studying the impact force according to the composition of a debris flow based on analysis of existing calculation methods. The impact force is divided into three parts: (1) the dynamic pressure provided by the debris flow slurry, which is composed of fine particles and water; (2) the impact force of coarse particles; and (3) the impact force of boulders. This paper analyzes the established formulations used to calculate the impact force by using hydrodynamic theory and contact mechanics to propose a debris flow impact model according to the debris flow type. The results show that the impact force is closely related to the solid volume fraction, composition of particle materials, motion velocity, and depth of a debris flow. Among all the components of the impact force, the boulder impact force is the largest followed by the impact force of coarse particles; the dynamic pressure is minimal.
KeywordDebris Flow Solid-liquid Two-phase Flow Gradation Of Particles Impact Force
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine ; Physical Sciences
DOI10.1007/s12665-015-5180-2
WOS Subject ExtendedEnvironmental Sciences & Ecology ; Geology ; Water Resources
Indexed BySCI
WOS KeywordSPHERES ; COEFFICIENT ; RESTITUTION ; CHINA
Language英语
WOS SubjectEnvironmental Sciences ; Geosciences, Multidisciplinary ; Water Resources
WOS IDWOS:000371393400021
Funding OrganizationNSFC(41272346) ; Chinese Academy of Sciences(KFJ-EW-STS-094) ; Shaanxi Provincial Transport Department
Citation statistics
Cited Times:17[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/15147
Collection山地灾害与地表过程重点实验室
Affiliation1.Chinese Acad Sci, Key Lab Mt Hazards & Surface Proc, Chengdu 610041, Peoples R China
2.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China
3.CAS Ctr Excellence Tibetan Plateau Earth Sci, 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
He, Siming,Liu, Wei,Li, Xinpo. Prediction of impact force of debris flows based on distribution and size of particles[J]. ENVIRONMENTAL EARTH SCIENCES,2016,75(4):DOI 10.1007/s12665-015-5180-2.
APA He, Siming,Liu, Wei,&Li, Xinpo.(2016).Prediction of impact force of debris flows based on distribution and size of particles.ENVIRONMENTAL EARTH SCIENCES,75(4),DOI 10.1007/s12665-015-5180-2.
MLA He, Siming,et al."Prediction of impact force of debris flows based on distribution and size of particles".ENVIRONMENTAL EARTH SCIENCES 75.4(2016):DOI 10.1007/s12665-015-5180-2.
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