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Numerical simulation of landslide over erodible surface

文献类型：期刊论文

作者Wei Liu1,2; Siming He1,2,3; Xinpo Li1,2
刊名Geoenvironmental Disasters
出版日期2015
页码DOI:10.1186/s40677-015-0027-4
关键词Landslide Erosion Excess pore water pressure Numerical simulation
ISSN号2197-8670
通讯作者Siming He
英文摘要

Estimating the magnitude and intensity of landslides is a fundamental requirement in quantitatively evaluating the risks involved, and preparing a mitigation strategy. Though the physics-based dynamic model of landslide can predict the travel distance, kinematic velocity, and hazard zone, the effects of erosion and the excess pore water pressure during the dynamic process of landslide are often ignored.

Results

In order to study these factors, a physics-based dynamic model of landslide considering erosion and excess pore water pressure is presented in this paper. A high-precision numerical method based on the finite volume method is proposed to solve the model equations. Several numerical tests are performed to verify the numerical method and the model. The effects of erosion and excess pore water pressure on the dynamic process of landslide are also analyzed.

Conclusions

The numerical results indicate that the scale and mobility of a landslide are influenced by the effect of erosion and excess pore water pressure. The excess pore water pressure can reduce the resistance to shear stress from the erodible bed and lead to a higher erosion amount and longer moving distance of the landslide. It also affects the degree of erosion and further affects the dynamic process of the landslide. The sensitivity analysis of the parameters that influence excess pore water pressure indicate that these parameters have a significant impact on the evolution of excess pore water pressure, and that the degree of saturation of bed sediment has the highest influence on excess pore water pressure.

学科主题动力地质学
语种英语
源URL[http://ir.imde.ac.cn/handle/131551/13981]  
专题中国科学院水利部成都山地灾害与环境研究所
作者单位1.Key laboratory of Mountain Hazards and Surface Process, Chinese Academy of Sciences
2.Institute of Mountain Hazards and Environment (IMHE), Chinese Academy of Sciences
3.Center for Excellence in Tibetan Plateau Earth Sciences, Chinese Academy of Sciences
推荐引用方式
GB/T 7714		 Wei Liu,Siming He,Xinpo Li. Numerical simulation of landslide over erodible surface[J]. Geoenvironmental Disasters,2015:DOI:10.1186/s40677-015-0027-4.
APA Wei Liu,Siming He,&Xinpo Li.(2015).Numerical simulation of landslide over erodible surface.Geoenvironmental Disasters,DOI:10.1186/s40677-015-0027-4.
MLA Wei Liu,et al."Numerical simulation of landslide over erodible surface".Geoenvironmental Disasters (2015):DOI:10.1186/s40677-015-0027-4.

入库方式： OAI收割

来源：成都山地灾害与环境研究所

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