Journal of the Japan Society of Erosion Control Engineering, Vol.66, No.3, 2013

Establishing a landslide dam detection methodology by interpreting artificial satellite high]resolution SARisynthetic aperture radarjimages based on a case study of sediment]related disasters caused by Typhoon Talas in the Kii Peninsula

Shin-ichiro HAYASHI, Masaki MIZUNO, Takumi SATO, Joko KAMIYAMA, Atsushi OKAMOTO, Tomohiro YOSHIKAWA, Toshiaki UDONO, Hiroshi YOKOTA, Atsuo NODA and Kazuo YOSHIKAWA


Abstract

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 from35to50degrees. Suitable image resolution is 3m. All sensors and bands are capable of detecting landslide dams.

Key wordsFlandslide dam, artificial satellite, synthetic aperture radar (SAR), high]resolution image

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