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Physically-based approach to analyze rainfall-triggered landslide using hydraulic gradient as slide direction

Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2012年第12期13卷 943-957页

作者： Qi-hua RAN1,Dan-yang SU1,Qun QIAN1,Xu-dong FU2,Guang-qian WANG1,2,Zhi-guo HE3 (1Department of Hydraulic Engineering,Zhejiang University,Hangzhou 310058,China) (2State Key Laboratory of Hydroscience and Engineering,Tsinghua University,Beijing 100084,China) (3Department of Ocean Science and Engineering,Zhejiang University,Hangzhou 310058,China) Department of Hydraulic Engineering Zhejiang University Hangzhou China State Key Laboratory of Hydroscience and Engineering Tsinghua University Beijing China Department of Ocean Science and Engineering Zhejiang University Hangzhou China

An infinite slope stability numerical model driven by the comprehensive physically-based integrated hydrology model(InHM) is *** this approach,the failure plane is assumed to be parallel to the hydraulic gradient instead of the slope *** method helps with irregularities in complex terrain since depressions and flat areas are allowed in the *** present model has been tested for two synthetic single slopes and a small catchment in the Mettman Ridge study area in Oregon,United States,to estimate the shallow landslide *** results show that the present approach can reduce the simulation error of hydrological factors caused by the rolling topography and depressions,and is capable of estimating spatial-temporal variations for landslide susceptibilities at simple slopes as well as at catchment scale,providing a valuable tool for the prediction of shallow landslides.

关键词： Shallow landslide infinite slope stability model Hydraulic gradient Physically-based hydrology model Integrated hydrology model(InHM)

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A spatial model for the assessment of debris flow susceptibility along the Kodaikkanal-Palani traffic corridor

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Frontiers of Earth Science 2020年第2期14卷 326-343页

作者： Evangelin Ramani SUJATHA Centre for Advanced Research on Environment School of Civil EngineeringSASTRA Deemed UniversityThanjavur 613401India

Debris flow is one of the most destructive water related mass movements that affects the development of mountain terrains.A reliable assessment of debris flow susceptibility requires adequate data,but in most developing countries like India,there is a dearth of such extensive scientific *** study presents a novel approach for assessing debris flow using the analytical network process(ANP)in data insufficient regions.A stretch of hill road between Kumburvayal and Vadakaunchi along the Kodaikkanal-Palani Traffic Corridor(M171)was considered for this *** significant factors including the nature of slope forming materials,hydraulic conductivity,slope,vegetation,and drainage density were identified from intense field surveys and inspections in order to assess the susceptibility of the terrain to debris *** model endorsed the interdependencies between the selected *** resulting debris flow susceptibility map delineated regions highly prone to debris flow occurrences,which constituted nearly 23%of the selected road stretch.

关键词： analytical network process(ANP) debris flow hydraulic conductivity GIS Kodaikkanal infinite slope stability model steady state hydrologic model

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