IMHE OpenIR  > 山地灾害与地表过程重点实验室
Numerical investigation of deposition mechanism of submarine debris flow
Language英语
Liu, Dingzhu1,2; Cui, Yifei3; Choi, Clarence E.3,4; Bazai, Nazir Ahmed1,2; Yu, Zhilin5; Lei, Mingyu1,2; Yin, Yanzhou1,2
2019
Source PublicationDebris-Flow Hazards Mitigation: Mechanics, Monitoring, Modeling, and Assessment - Proceedings of the 7th International Conference on Debris-Flow Hazards Mitigation
Author of SourceAccess Limited Construction ; Association of Environmental and Engineering Geologists ; BGC Engineering Inc. ; et al. ; Geobrugg North America ; KANE Geotech Inc.
Pages38-45
meeting7th International Conference on Debris-Flow Hazards Mitigation: Mechanics, Monitoring, Modeling, and Assessment
Conference DateJune 10, 2019 - June 13, 2019
Conference PlaceGolden, CO
CountryUnited states
Contribution Rank1
AbstractDebris-flow susceptibility is controlled not only by static effective factors such as topography and lithology, but also by dynamic effective factors such as earthquake, rainfall and human activity. In this paper, a simple model of calculating the dynamic susceptibility is developed based on the assumption of linear relationship between the static and dynamic susceptibilities. The influence of earthquake and rainfall events is represent by two coefficients. The earthquake coefficient is considered as an exponential function of intensity, and a negative power function of elapsed time. The rainfall coefficient is proportional to the occurrence days of heavy rainfall. This model is applied to assess the debris-flow susceptibility of Hengduan mountainous area from 2000 to 2015. Four static effective factors including relative relief, slope, lithology and fault density are used to calculate the static susceptibility by ARCGIS grid toolbox. There are six earthquake events since 1995 whose intensity zones of >= VI are intersected with the Hengduan area. The earthquake coefficient is calculated with the intensity zoning data of each of the six events and then is accumulated to get the final earthquake coefficient in each year. TRMM satellite rainfall data from 2000 to 2015 are collected to extract the occurrence days of heavy rainfall which is used to calculate the rainfall coefficient. The dynamic susceptibilities from 2000 to 2015 are obtained by multiplying the static susceptibility with the earthquake and rainfall coefficients in respective year. The 2015 susceptibility map shows a qualitative agreement with the distribution map of disasters in 2015. © 2019 Debris-Flow Hazards Mitigation: Mechanics, Monitoring, Modeling, and Assessment - Proceedings of the 7th International Conference on Debris-Flow Hazards Mitigation. All rights reserved.
KeywordDebris Dynamics Exponential functions Hazards Lithology Magnetic susceptibility Rain Rain gages Topography
DOI10.25676/11124/173239
ISBN9780578510828
URL查看原文
Indexed ByEI
Accession numberAccession number;20200408089004
Citation statistics
Document Type会议论文
Identifierhttp://ir.imde.ac.cn/handle/131551/33789
Collection山地灾害与地表过程重点实验室
Corresponding AuthorLiu, Dingzhu; Cui, Yifei
Affiliation1.Key Laboratory of Mountain Hazards and Earth Surface Process, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu; 610041, China;
2.University of Chinese Academy of Sciences, Beijing; 100049, China;
3.Department of Civil and Environmental Engineering, Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, Hong Kong;
4.HKUST Jockey Club Institute for Advanced Study, HKSAR, Hong Kong, Hong Kong;
5.Southwest Electric Power Design Institute, Chengdu; 610021, 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
Liu, Dingzhu,Cui, Yifei,Choi, Clarence E.,et al. Numerical investigation of deposition mechanism of submarine debris flow[C]//Access Limited Construction, Association of Environmental and Engineering Geologists, BGC Engineering Inc., et al., Geobrugg North America, KANE Geotech Inc.,2019:38-45.
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