Numerical investigation of deposition mechanism of submarine debris flow

doi:10.25676/11124/173239

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > 山地灾害与地表过程重点实验室

	Numerical investigation of deposition mechanism of submarine debris flow
	Liu, Dingzhu 2,4; Cui, Yifei 3; Choi, Clarence E.3,5; Bazai, Nazir Ahmed 2,4; Yu, Zhilin 1; Lei, Mingyu 2,4; Yin, Yanzhou 2,4
	2019
会议日期	June 10, 2019 - June 13, 2019
会议地点	Golden, CO
关键词	Debris Dynamics Exponential functions Hazards Lithology Magnetic susceptibility Rain Rain gages Topography
DOI	10.25676/11124/173239
页码	38-45
国家	United states
英文摘要	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.
源文献作者	Access Limited Construction ; Association of Environmental and Engineering Geologists ; BGC Engineering Inc. ; et al. ; Geobrugg North America ; KANE Geotech Inc.
产权排序	1
会议录	Debris-Flow Hazards Mitigation: Mechanics, Monitoring, Modeling, and Assessment - Proceedings of the 7th International Conference on Debris-Flow Hazards Mitigation
语种	英语
URL标识	查看原文
ISBN号	9780578510828
内容类型	会议论文
源URL	[http://ir.imde.ac.cn/handle/131551/33789]
专题	成都山地灾害与环境研究所_山地灾害与地表过程重点实验室
通讯作者	Liu, Dingzhu; Cui, Yifei
作者单位	1.Southwest Electric Power Design Institute, Chengdu; 610021, 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.Key Laboratory of Mountain Hazards and Earth Surface Process, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu; 610041, China; 5.HKUST Jockey Club Institute for Advanced Study, HKSAR, Hong Kong, Hong Kong;
推荐引用方式 GB/T 7714	Liu, Dingzhu,Cui, Yifei,Choi, Clarence E.,et al. Numerical investigation of deposition mechanism of submarine debris flow[C]. 见:. Golden, CO. June 10, 2019 - June 13, 2019.