• Title/Summary/Keyword: 아스터

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Analysis of Landslide locations using Spectral Reflectance of Clay Mineral and ASTER Satellite Image (점토광물의 분광반사율 및 ASTER 위성영상을 이용한 산사태 발생지역 분석)

  • Nam, Koung-Hoon;Lee, Hong-Jin;Jeong, Gyo-Cheol
    • The Journal of Engineering Geology
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    • v.24 no.3
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    • pp.411-421
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    • 2014
  • The purpose of this study is to analyze the key factors that contribute to landslide causes through swelling clay minerals and terrain analysis in landslide sites taken place of in Yongin city, Gyeonggi-do, 2011. The study was conducted based on field survey by XRD (X-ray Diffraction), XRF (X-ray fluorescence), spectroscopic analysis on soil samples obtained from landslide sites and ASTER satellite image. Illite shows absorption features; $Fe^{2+}$ and $Fe^{3+}$ at 0.9 and $1.0{\mu}m$, broad water absorption features near 1.4 and $1.9{\mu}m$, and additional Al-hydroxyl features at 2.2, 2.3 and $2.4{\mu}m$, respectively. These absorption features are consistent with the bands 5, 6, and 7 of ASTER (Advanced Spaceborne Thermal Emission and Reflection Radiometer) satellite image. Illite image was extracted using band math of $SWIR_{Illite}$. From these results, we confirmed the applicability of ASTER satellite image using identification of swelling clay minerals to landslide study.