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Probabilistic landslide hazard mapping using GIS and remote sensing data at Boun, Korea

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The aim of this study is to evaluate the hazard of landslides at Boun, Korea, using a Geographic Information System (GIS) and remote sensing. Landslide locations were identified in the Boun area from interpretation of aerial photographs and field surveys. The topographic, soil, forest, geologic, lineament and land cover data were collected, processed and constructed into a spatial database using GIS and remote sensing data. The factors that influence landslide occurrence, such as slope, aspect and curvature of the topography, were calculated from the topographic database. Texture, material, drainage and effective soil thickness were extracted from the soil database, and type, age, diameter and density of timber were extracted from the forest database. The lithology was extracted from the geological database and lineaments were detected from Indian Remote Sensing (IRS) satellite images. The land cover was classified based on the Landsat Thematic Mapper (TM) satellite image. Landslide hazard areas were analysed and mapped, using the landslide-occurrence factors, by the probability-likelihood ratio method. The results of the analysis were verified using actual landslide location data. The validation results showed satisfactory agreement between the hazard map and the existing data on landslide locations.
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Document Type: Research Article

Affiliations: 1: Geoscience Information Center, Korea Institute of Geology Mining & Materials (KIGAM) 30 Gajeong-dong, Yuseong-gu, Daejeon Korea, Email: [email protected] 2: Department of Earth System Sciences Yonsei University 134 Shinchondong Seoul Korea

Publication date: 2004-06-01

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