Journal of the Korean Association of Geographic Information Studies (한국지리정보학회지)

The Korean Association of Geographic Information Studies (한국지리정보학회)
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Evaluation of Landslide Susceptibility Using GIS and RS

GIS 및 RS기법을 활용한 산사태 취약성 평가

  • Kim, Kyung-Tae (Dept. of Landscape Architecture, Kyungpook National University) ;
  • Jung, Sung-Gwan (Dept. of Landscape Architecture, Kyungpook National University) ;
  • Park, Kyung-Hun (Dept. of Environment Engineering, Chagnwon National University) ;
  • Oh, Jeong-Hak (Div. of Forest Ecology, Korea Forest Research Institute)
  • Received : 2005.02.10
  • Accepted : 2005.03.22
  • Published : 2005.03.31
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Abstract

This study aims at predicting and mapping of the landslide susceptibility in the Geumho river watershed using GIS and Remote Sensing techniques. We constructed the spatial database of affecting factors such as slope angle, slope aspect, lithology, landuse, and vegetation index (NDVI) at a $30m{\times}30m$ resolution. The landslide susceptibility of the study area was predicted through overlay analysis and adding up estimation matrix, and the predicted map of landslide susceptibility with six categories (stable, very low, low, moderate, high, very high) was constructed. As the results, it showed that the very high susceptibility zones made up approximately 0.3% of the total study area, and these zones were mainly distributed in the forest area with the high slope angle and low vegetation index.

본 연구는 금호강 유역을 대상으로 GIS와 원격탐사기법을 활용하여 산사태 취약성의 예측과 지도화를 수행하고자 한다. 산사태 영향인자인 사면경사, 사면방향, 지질, 토지이용도, 식생지수(NDVI)의 공간데이터베이스는 $30m{\times}30m$ 해상도로 구축하였다. 산사태 취약성은 중첩분석과 합산 평가 매트릭스 방법으로 예측하였고, 6개 범주(안정, 매우 낮음, 낮음, 중간, 높음, 매우 높음)로 구분한 산사태 취약성 지도를 제작하였다. 분석결과에 따르면, 산사태 취약성이 '매우높은' 지역은 전체 대상지의 약 0.3% 정도를 차지하며 이들 지역은 주로 높은 경사도와 낮은 식생지수를 가지는 산림지역에 분포하는 것으로 나타났다.

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