Detection of Slope Failures using ALOS/AVNIR-2 Images for the 2008 Iwate-Miyagi Inland Earthquake

• ISHIDE Takahiro

  Chiba University

• YAMAZAKI Fumio

  Chiba University

Bibliographic Information

Other Title

• ALOS/AVNIR-2 画像を用いた2008 年岩手・宮城内陸地震における斜面崩壊の検出

Abstract

ALOS/AVNIR-2 optical images were employed to extract slope failures which occurred in the 14 June 2008 Iwate-Miyagi Inland, Japan, earthquake. Since the earthquake occurred in the mountainous area, many landslides were caused. In this paper, landslide areas were extracted comparing the pre- and post-event ALOS/AVNIR-2 images by two methods. One method uses the difference of the normalized difference vegetation index (NDVI) obtained from the pre- and post-event images. Another method performs a supervised land-cover classification by maximum likelihood approach, and the difference of extracted bare-ground pixels between the two images was recognized as landslide. The digital elevation model (DEM) was also employed to reveal the relationship between the slope angle and the occurrence of landside, and to remove the extraction errors on non-sloping ground. Comparing with the visual inspection result, the accuracy of these image processing methods was demonstrated.

Journal

• Journal of Japan Association for Earthquake Engineering

  Journal of Japan Association for Earthquake Engineering 10 (3), 12-24, 2010

  JAPAN ASSOCIATION FOR EARTHQUAKE ENGINEERING

Keywords

• the 2008 Iwate-Miyagi Inland Earthquake
• Slope Failure
• ALOS/AVNIR-2
• Normalized Difference Vegetation Index
• Supervised Classification
• Digital Elevation Model

Details

• CRID: 1390001205359079808
• NII Article ID: 130001082817
• DOI: 10.5610/jaee.10.3_12
• ISSN: 18846246
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed