Spatial Landslide Susceptibility Modeling of Deokjeok-ri Creek Using Index of Entropy Method and Its Validation in Karisan-ri Creek

摘要

The main purpose of this research was to prepare landslide susceptibility map of Deokjeok-ri Creek and validate the result by model replication in Karisan-ri Creek. The Index of Entropy (IoE) method was used to determine the relationship between landslide causative factors (CF) and landslide occurrence. To determine the effect of CFs on landslides, data layers of topographic, hydrological, soil, forest, and geological factors were analyzed in a geographic information system (GIS) environment. The landslide susceptibility of Karisan-ri Creek was prepared without any consideration of previous landslides occurrences. To assess its accuracy, instead of using new landslides of same area, landslides from a Karisan-ri Creek was selected for estimation of prediction rate. This study confirms that replication of landslide susceptibility analysis procedure is possible if the landslide distribution pattern and the causative factors used in the models are similar in nature and origin.