Journal of the Korean Society of Environmental Restoration Technology (한국환경복원기술학회지)

The Korea Society of Environmental Restoration Technology (한국환경복원기술학회)
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Study on Application of Topographic Position Index for Prediction of the Landslide Occurrence

산사태 발생지 예측을 위한 Topographic Position Index의 적용성 연구

  • Woo, Choong-Shik (Division of Forest Soil Conservation, Korea Forest Research Institute) ;
  • Lee, Chang-Woo (Division of Forest Soil Conservation, Korea Forest Research Institute) ;
  • Jeong, Yongho (Division of Forest Soil Conservation, Korea Forest Research Institute)
  • 우충식 (국립산림과학원 산림환경부 임지보전과) ;
  • 이창우 (국립산림과학원 산림환경부 임지보전과) ;
  • 정용호 (국립산림과학원 산림환경부 임지보전과)
  • Received : 2007.08.31
  • Accepted : 2008.04.03
  • Published : 2008.04.29
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Abstract

The objective of the study is 10 know the relation of landslide occurrence with using TPI (Topographic Position Index) in the Pyungchang County. Total 659 landslide scars were detected from aerial photographs. To analyze TPI, 100m SN (Small-Neighborhood) TPI map, 500m LN (Large-Neighborhood) TPI map, and slope map were generated from the DEM (Digital Elevation Model) data which are made from 1 : 5,000 digital topographic map. 10 classes clustered by regular condition after overlapping each TPI maps and slope map. Through this process, we could make landform classification map. Because it is only to classify landform, 7 classes were finally regrouped by the slope angle information of landslide occurrence detected from aerial photography analysis. The accuracy of reclassified map is about 46%.

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