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Evaluation of slope stability of Taebaeksan Mountain National Park using detailed soil map
Kim, Young-Hwan Jun, Kye-Won Jun, Byong-Hee Lee, Ho-Jin Kim, Soung-Doug Jang, Chang-Deok
Kim, Young-Hwan
Jun, Kye-Won
Jun, Byong-Hee
Lee, Ho-Jin
Kim, Soung-Doug
Jang, Chang-Deok
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2019
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Abstract
More than 64% of Korea's land is occupied by mountain regions, which have terrain characteristics that make it vulnerable to mountain disasters. The trails of Taebaeksan Mountain National Park—the region considered in this study—are located in the vicinity of steep slopes, and therefore, the region is vulnerable to landslides and debris flow during heavy storms. In this study, a slope stability model, which is a deterministic analysis method, was used to examine the potential occurrence of landslides. According to the soil classification of the detailed soil map, the specific weight of soil, effective cohesion, internal friction angle of soil, effective soil depth, and ground slope were used as the parameters of the model, and slope stability was evaluated based on the DEM of a 1 m grid. The results of the slope stability analysis showed that the more hazardous the area was, the closer the ratio of groundwater/effective soil depth is to 1.0. Further, many of the private houses and commercial facilities in the lower part of the national park were shown to be exposed to danger.
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