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http://dx.doi.org/10.7319/kogsis.2015.23.3.023

Application of Geomorphological Features for Establishing the Preliminary Landslide Hazard  

Cha, A Reum (National Disaster Management Institute, Department of Civil and Environmental Engineering, Hanyang University)
Kim, Tai Hoon (National Disaster Management Institute)
Gang, Seok Koo (Department of Civil and Environmental Engineering, Hanyang University)
Publication Information
Journal of Korean Society for Geospatial Information Science / v.23, no.3, 2015 , pp. 23-29 More about this Journal
Abstract
Due to the characteristics of landslide disasters including debris flow, the rapid speed to downward and difficulty to respond or evacuate from them, it is imperative to identify their potential hazards and prepare the reduction plans. However, the current landslide hazards generated by a variety of methods has been raised its accuracy because of the complexity of input data and their analyses, and the simplification of the landslide model. The main objective of this study is, therefore, to evaluate the preliminary landslide hazard based on the identification of geomorphological features. Especially, two methodologies based on the statistics of the directional data, Vector dispersion and Planarity analyses, are used to find some relationships between geomorphological characteristics and the landslide hazard. Results show that both methods well discriminate geomorphological features between stable and unstable domains in the landslide areas. Geomorphological features are closely related to the landslide hazard and it is imperative to maximize their characteristics by adapting multiple models rather than individual model only. In conclusions, the mechanism of landslide is not determined solely by a simple cause but the complex natural phenomenon caused by the interactions of the numerous factors and it is of primary importance to require additional researches for the outbreaking mechanism that are based on various methodologies.
Keywords
Landslide; Debris Flow; Hazard; Vector Dispersion; Planarity;
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