Landslide Susceptibility Mapping of West Central Nepal Lesser Himalaya Baglung Municipality, Baglung, Nepal

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Abstract
The study is mainly focused on the landslide susceptibility mapping. The different primary data were collected and systematic sampling was done to find the various geotechnical properties of earth materials. The Lesser Himalayan rocks are represented by phyllites, pelitic schists, white quartzite, Meta carbonates, graphitic schist, laminated quartzite and garnetiferous schists. These lithological units of the Lesser Himalaya are compared with the units of Nuwakot Complex in central Nepal. The phyllites are the oldest unit in the Lesser Himalaya of the study area and white quartzite is present towards the lower parts whereas phyllite occur in the lower and upper portion and metabasic rock (mainly amphibolites) is also present. There are numerous small-scale folds and normal faults present in the study area. In the south part lies major structure called Phalebas thrust. In the study area more than 200 m thick quaternary alluvial is present. The landslide distribution was identified with the assistance of Google earth to generate the landslide inventory. Logistic Regression Model was used for the preparation of landslide susceptibility map of the area. The causative factors such as elevation, slope, curvature, land use, geology, rainfall, soil type, soil thickness topographic wetness index, stream density, were used to prepare the landslide susceptibility map. All the thematic layers of these parameters were made using ArcGIS 10.4.1.

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