ANALYSIS ON THE DEEP SEATED LANDSLIDE OCCURRED IN SHAOLIN VILLEGE, KAOHSIUNG COUNTY, TAIWAN

Abstract

In August 2009, the Typhoon Morakot hit Taiwan and caused an extraordinary amount of rainfall. Due to the heavy rainfall, a large number of floods and sediment-related disasters occurred all over the island. In Shaolin Village, Kaohsiung County, a huge landslide occurred around 6 am August 9, destroyed the village completely and killed more than 500 people. After the landslide, authors visited the landslide site and investigated the landslide scour to collect information on factors affecting landslide occurrence such as exposed bedrock and soil layer conditions. GIS analysis using DEM data were also conducted to determine the sliding domain. According to the site investigation and GIS analysis, rainwater infiltration analysis and slope stability analysis were conducted. Results of the analysis suggested that the landslide domain, about 1,200 m long, 500 m wide and 80 m deep was collapsed by multi phased manner.