Abstract

Slope disaster is one of the repeated occurring geological disasters in rainy season resulting in about 23 human losses in Korea every year. The slope disaster, however, mainly depends on the spatial and climate properties, such as geology, geomorphology, and heavy rainfall, and, hence, the prediction or hazard analysis of the slope disaster is a difficult task. Therefore, GIS and various statistical methods are implemented for slope disaster analysis. In particular, GIS technique is widely used for the analysis because it effectively handles large amount of spatial data. The GIS technique, however, only considers the statistics between slope disaster occurrence and related factors, not the mechanism. Accordingly, an infinite slope model that mechanically considers the balance of forces applied to the
slope is suggested here with GIS for slope disaster analysis. According to the research results, the infinite slope model has a possibility that can be utilized for landslide prediction and hazard evaluation since 87.5% of landslide occurrence areas have been predicted by this technique.

Keywords infinite slope model, GIS, slope disaster, mechanical model