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http://dx.doi.org/10.14481/jkges.2019.20.2.5

Estimation of Landslide Risk based on Infinity Flow Direction  

Oh, Sewook (Department of Construction and Disaster Prevention Engineering, Kyungpook National University)
Lee, Giha (Department of Construction and Disaster Prevention Engineering, Kyungpook National University)
Bae, Wooseok (R&D Center NANO-GEO ENC Co. Ltd.)
Publication Information
Journal of the Korean GEO-environmental Society / v.20, no.2, 2019 , pp. 5-18 More about this Journal
Abstract
In this study, it was conducted a broad-area landslide analysis for the entire area of Kyungsangbuk-do Province based on spatially-distributed wetness index and root reinforcement infinity slope stability theory. Specifically, digital map, soil map and forest map were used to extract topological and geological parameters, and to build spatially-distributed database at $10m{\times}10m$ resolution. Infinity flow direction method was used for rain catchment area to produce spatially-distributed wetness index. The safety level that indicates risk of a broad-area landslide was classified into four groups. The result showed that areas with a high estimated risk of a landslide coincided with areas that recently went through an actual landslide, including Bonghwa and Gimcheon, and unstable areas were clustered around mountainous areas. A comparison between the estimation result and the records of actual landslide showed that the analysis model is effective for estimating a risk of a broad-area landslide based on accumulation of reasonable parameters.
Keywords
Root reinforcement infinity slope stability; Infinity flow direction; Specific catchment area; Landslide risk;
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