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http://dx.doi.org/10.7848/ksgpc.2017.35.5.357

GIS-based Landslide Susceptibility Mapping of Bhotang, Nepal using Frequency Ratio and Statistical Index Methods  

Acharya, Tri Dev (Dept. of Civil Engineering, Kangwon National Univ.)
Yang, In Tae (Dept. of Civil Engineering, Kangwon National Univ.)
Lee, Dong Ha (Dept. of Civil Engineering, Kangwon National Univ.)
Publication Information
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography / v.35, no.5, 2017 , pp. 357-364 More about this Journal
Abstract
The purpose of the study is to develop and validate landslide susceptibility map of Bhotang village development committee, Nepal using FR (Frequency Ration) and SI (Statistical Index) methods. For the purpose, firstly, a landslide inventory map was constructed based on mainly high resolution satellite images available in Google Earth Pro, and rest fieldwork as verification. Secondly, ten conditioning factors of landslide occurrence, namely: altitude, slope, aspect, mean topographic wetness index, landcover, normalized difference vegetation index, dominant soil, distance to river, distance to lineaments and rainfall, were derived and used for the development of landslide susceptibility map in GIS (Geographic Information System) environment. The landslide inventory of total 116 landslides was divided randomly such that 70% were used for training and remaining 30% for validating result by receiver operating characteristics curve analysis. The area under the curve were found to be greater than 0.7 indicating an acceptable susceptibility maps obtained using FR and SI methods in GIS for hilly region of Nepal.
Keywords
Landslide; Susceptibility; Frequency Ratio; Statistical Index; GIS; Bhotang; Nepal;
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Times Cited By KSCI : 2  (Citation Analysis)
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