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Study on Application of Topographic Position Index for Prediction of the Landslide Occurrence  

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)
Publication Information
Journal of the Korean Society of Environmental Restoration Technology / v.11, no.2, 2008 , pp. 1-9 More about this Journal
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%.
Keywords
Landslide; TPI; DEM; Landform classification; Aerial photographs;
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