Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XLI-B1, 1201-1205, 2016
http://www.int-arch-photogramm-remote-sens-spatial-inf-sci.net/XLI-B1/1201/2016/
doi:10.5194/isprs-archives-XLI-B1-1201-2016
 
06 Jun 2016
PRECURSORY SLOPE DEFORMATION AROUND LANDSLIDE AREA DETECTED BY INSAR THROUGHOUT JAPAN
T. Nakano1, K. Wada1,a, M. Yamanaka1, I. Kamiya1,b, and H. Nakajima1 1Geospatial Information Authority of Japan, 1 Kitasato, Tsukuba, Ibaraki, Japan
aPresent affiliation: Ministry of Education, Culture, Sports, Science and Technology, Japan
bPresent affiliation: Japan Digital Road Map Association
Keywords: InSAR, landslide, precursory slope deformation, field survey Abstract. Interferometric Synthetic Aperture Radar (InSAR) technique is able to detect a slope deformation around landslide (e.g., Singhroy et al., 2004; Une et al., 2008; Riedel and Walther, 2008; Sato et al., 2014). Geospatial Information Authority (GSI) of Japan has been performing the InSAR analysis regularly by using ALOS/PALSAR data and ALOS-2/PALSAR-2 data throughout Japan. There are a lot of small phase change sites except for crustal deformation with earthquake or volcano activity in the InSAR imagery. Most of the phase change sites are located in landslide area. We conducted field survey at the 10 sites of those phase change sites. As a result, we identified deformation of artificial structures or linear depressions caused by mass movement at the 9 sites. This result indicates that InSAR technique can detect on the continual deformation of landslide block for several years. GSI of Japan will continue to perform the InSAR analysis throughout Japan. Therefore, we will be able to observe and monitor precursory slope deformation around landslide areas throughout Japan.
Conference paper (PDF, 1597 KB)


Citation: Nakano, T., Wada, K., Yamanaka, M., Kamiya, I., and Nakajima, H.: PRECURSORY SLOPE DEFORMATION AROUND LANDSLIDE AREA DETECTED BY INSAR THROUGHOUT JAPAN, Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XLI-B1, 1201-1205, doi:10.5194/isprs-archives-XLI-B1-1201-2016, 2016.

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