Landslide hazard map: tool for optimization of low-cost mitigation

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• 作者：Bhim Kumar Dahal ; Ranjan Kumar Dahal
• 关键词：Bioengineering ; GIS ; Hazard ; Landslide ; Mitigation ; Rainfall ; Weight ; of ; evidence modeling
• 刊名：Geoenvironmental Disasters
• 出版年：2017
• 出版时间：December 2017
• 年：2017
• 卷：4
• 期：1
• 全文大小：4628KB
• 刊物类别：Environment, general; Earth Sciences, general; Geography (general); Geoecology/Natural Processes; Na
• 刊物主题：Environment, general; Earth Sciences, general; Geography, general; Geoecology/Natural Processes; Natural Hazards; Environmental Science and Engineering;
• 出版者：Springer International Publishing
• ISSN：2197-8670
• 卷排序：4

文摘

BackgroundLandslide hazard mapping is a fundamental tool for disaster management activities in fragile mountainous terrains. The main purpose of this study is to carry out landslide hazard assessment by weights-of-evidence modelling and prepare optimized mitigation map in the Higher Himalaya of Nepal. The modelling was performed within a geographical information system (GIS), to derive a landslide hazard map of the North-West marginal hills of the Achham. Thematic maps representing various factors that are related to landslide activity were generated using field data and GIS techniques. Landslide events of the old landslides were used to assess the Bayesian probability of landslides in each cell unit with respect to the causative factors.