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Early identification and dynamic processes of ridge-top rockslides: implications from the Su Village landslide in Suichang County Zhejiang Province China
Ouyang Chaojun1,2,3; Zhao Wei1,2,3; An Huicong1,2,3; Zhou Shu1,2,3; Wang Dongpo4; Xu Qiang4; Li Weile4; Peng Dalei4
2019
Source PublicationLANDSLIDES
ISSN1612-510X
EISSN1612-5118
Volume16Issue:4Pages:799-813
SubtypeArticle
Contribution Rank1
AbstractRidge-top rockslides frequently cause huge property losses and casualties due to the difficulties involved in detecting their precursors by means of manual surveys. Their early identification and the surrounding area's evaluation in terms of potential danger are essential for preventing disasters. The recent large rockslide which occurred at Su Village which is in possession of data related to pre-failure images real-time video and post-failure boreholes is helpful for providing new insights into the processes associated with these events. Due to a strong sustained rainfall a large volume of granite blocks rapidly descended from the upper part of the hillside causing 27 deaths and destroying more than 20 houses. It is found that the early identification of the hazard associated with such rockfalls can be made by the analysis of remote sensing images and Persistent Scatterer Interferometry (PSI) analysis of Synthetic Aperture Radar (SAR) data. The depth-integrated continuum method including taking the entrainment effect into account was adopted to analyze the dynamic processes and to identify the areas at risk. The computational results show that the evaluated runout distance and extent match well with the field investigation results. The parameter sensitivity surrounding cohesion coefficients of lateral earth pressure and volume amplification were analyzed. It is demonstrated that the cohesion plays a significant role in the dynamic processes and the deposited area. However the effects from the earth pressure coefficient and volume bulking are comparatively weaker.
KeywordRockslide Remote sensing image InSAR Dynamic process MacCormack-TVD scheme Numerical modeling
DOI10.1007/s10346-018-01128-w
Indexed BySCI
Language英语
WOS IDWOS:000463099000011
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/25557
Collection山地灾害与地表过程重点实验室
Corresponding AuthorOuyang Chaojun
Affiliation1.Chinese Acad Sci, Key Lab Mt Hazards & Surface Proc, Chengdu 610041, Sichuan, Peoples R China;
2.Chinese Acad Sci, IMHE, Chengdu 610041, Sichuan, Peoples R China;
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China;
4.Chengdu Univ Technol, State Key Lab Geohazard Prevent & Geoenvironm Pro, Chengdu 610059, Sichuan, 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
Ouyang Chaojun,Zhao Wei,An Huicong,et al. Early identification and dynamic processes of ridge-top rockslides: implications from the Su Village landslide in Suichang County Zhejiang Province China[J]. LANDSLIDES,2019,16(4):799-813.
APA Ouyang Chaojun.,Zhao Wei.,An Huicong.,Zhou Shu.,Wang Dongpo.,...&Peng Dalei.(2019).Early identification and dynamic processes of ridge-top rockslides: implications from the Su Village landslide in Suichang County Zhejiang Province China.LANDSLIDES,16(4),799-813.
MLA Ouyang Chaojun,et al."Early identification and dynamic processes of ridge-top rockslides: implications from the Su Village landslide in Suichang County Zhejiang Province China".LANDSLIDES 16.4(2019):799-813.
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