| 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
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| 2019 | |
| Source Publication | Debris-Flow Hazards Mitigation: Mechanics, Monitoring, Modeling, and Assessment - Proceedings of the 7th International Conference on Debris-Flow Hazards Mitigation |
| Author of Source | Access Limited Construction ; Association of Environmental and Engineering Geologists ; BGC Engineering Inc. ; et al. ; Geobrugg North America ; KANE Geotech Inc. |
| Pages | 38-45 |
| meeting | 7th International Conference on Debris-Flow Hazards Mitigation: Mechanics, Monitoring, Modeling, and Assessment |
| Conference Date | June 10, 2019 - June 13, 2019 |
| Conference Place | Golden, CO |
| Country | United states |
| Contribution Rank | 1 |
| Abstract | Debris-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. |
| Keyword | Debris Dynamics Exponential functions Hazards Lithology Magnetic susceptibility Rain Rain gages Topography |
| DOI | 10.25676/11124/173239 |
| ISBN | 9780578510828 |
| URL | 查看原文 |
| Indexed By | EI |
| Accession number | Accession number;20200408089004 |
| Citation statistics | |
| Document Type | 会议论文 |
| Identifier | http://ir.imde.ac.cn/handle/131551/33789 |
| Collection | 山地灾害与地表过程重点实验室 |
| Corresponding Author | Liu, Dingzhu; Cui, Yifei |
| Affiliation | 1.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. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| 01-06_Liu.pdf（848KB） | 会议论文 | 开放获取 | CC BY-NC-SA | View Application Full Text | ||
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