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Numerical study of granular debris flow run-up against slit dams by discrete element method
Zhou Gordon G. D.1,2; Du Junhan1,2; Song Dongri1,2; Choi Clarence E.3; Hu H. S1,2; Jiang Chenghua4
2019
Source PublicationLANDSLIDES
ISSN1612-510X
EISSN1612-5118
PagesDOI:10.1007/s10346-019-01287-4
SubtypeArticle;Early Access
Contribution Rank1
AbstractRun-up of granular debris flows against slit dams on slopes is a complex process that involves deceleration, deposition, and discharge. It is imperative to understand the run-up mechanism and to predict the maximum run-up height for the engineering design and hazard mitigation. However, the interaction between granular flows and slit dams, which significantly affects the run-up height, is still not well understood. In this study, an analytical model based on the momentum approach was derived to predict the run-up heights of granular debris flows. A numerical investigation of granular debris flow impacting slit dams using the discrete element method (DEM) was then conducted. The influence of the Froude number (N-Fr) and the relative post spacing (R) on run-up height were studied. This study illustrates that the analytical model based on the momentum approach can predict the run-up heights well within a certain range of Froude numbers. There is a critical value of relative post spacing (R-C): within the critical value, the maximum run-up height is insensitive to the relative post spacing; once R exceeds the critical value, the maximum run-up height decreases rapidly as the relative post spacing increases.
KeywordGranular debris flow Slit dam Soil structure interaction Run-up height
DOI10.1007/s10346-019-01287-4
Indexed BySCI
Language英语
WOS IDWOS:000493482000001
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/31290
Collection山地灾害与地表过程重点实验室
Corresponding AuthorDu Junhan
Affiliation1.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Hazards & Earth Surface Proc, Chengdu, Sichuan, Peoples R China;
2.Univ Chinese Acad Sci, Beijing, Peoples R China;
3.Univ Hong Kong, Dept Civil Engn, Pok Fu Lam, Hong Kong, Peoples R China;
4.Kunming Dongchuan Debris Flow Prevent & Control I, Kunming, Yunnan, 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
Corresponding 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
Zhou Gordon G. D.,Du Junhan,Song Dongri,et al. Numerical study of granular debris flow run-up against slit dams by discrete element method[J]. LANDSLIDES,2019:DOI:10.1007/s10346-019-01287-4.
APA Zhou Gordon G. D.,Du Junhan,Song Dongri,Choi Clarence E.,Hu H. S,&Jiang Chenghua.(2019).Numerical study of granular debris flow run-up against slit dams by discrete element method.LANDSLIDES,DOI:10.1007/s10346-019-01287-4.
MLA Zhou Gordon G. D.,et al."Numerical study of granular debris flow run-up against slit dams by discrete element method".LANDSLIDES (2019):DOI:10.1007/s10346-019-01287-4.
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