Establishing a landslide dam detection methodology by interpreting artificial satellite high-resolution SAR （synthetic aperture radar） images based on a case study of sediment-related disasters caused by Typhoon Talas in the Kii Peninsula

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  • HAYASHI Shin-ichiro
    National Institute for Land and Infrastructure Management, Ministry of Land, Infrastructure, Transport and Tourism
  • MIZUNO Masaki
    National Institute for Land and Infrastructure Management, Ministry of Land, Infrastructure, Transport and Tourism
  • SATO Takumi
    National Institute for Land and Infrastructure Management, Ministry of Land, Infrastructure, Transport and Tourism
  • KAMIYAMA Joko
    National Institute for Land and Infrastructure Management, Ministry of Land, Infrastructure, Transport and Tourism
  • OKAMOTO Atsushi
    National Institute for Land and Infrastructure Management, Ministry of Land, Infrastructure, Transport and Tourism
  • YOSHIKAWA Tomohiro
    National Institute for Land and Infrastructure Management, Ministry of Land, Infrastructure, Transport and Tourism
  • UDONO Toshiaki
    PASCO Corporation
  • YOKOTA Hiroshi
    PASCO Corporation
  • NODA Atsuo
    PASCO Corporation
  • YOSHIKAWA Kazuo
    PASCO Corporation

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Other Title
  • 紀伊半島台風12号災害を事例とした人工衛星高分解能SAR画像の判読による河道閉塞箇所探索手法の確立
  • キイ ハントウ タイフウ 12ゴウ サイガイ オ ジレイ ト シタ ジンコウ エイセイ コウブンカイノウ SAR ガゾウ ノ ハンドク ニ ヨル カドウ ヘイソク カショ タンサク シュホウ ノ カクリツ

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We tried to establish the detection methodology by viewing single high resolution synthetic aperture radar (SAR) satellite images which are now available. At first, a check list was made to qualitatively evaluate if it is or is not possible to detect landslide dams. By using that check list, high resolution SAR satellite images (TerraSAR-X, COSMO-SkyMed, RADARSAT-2) of Talas disaster in the Kii Peninsula have been evaluated. We confirmed conditions suitable for satellite as follows. All direction radar can detect landslide dams. The radar angle range suitable for obtaining images is from 35 to 50 degrees. Suitable image resolution is 3m. All sensors and bands are capable of detecting landslide dams.

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