Japan Geoscience Union Meeting 2016

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Symbol H (Human Geosciences) » H-DS Disaster geosciences

[H-DS17] Geohazards in humid, tectonically active countries and their precursors

Tue. May 24, 2016 3:30 PM - 4:30 PM 202 (2F)

Convener:*Masahiro Chigira(Disaster Prevention Research Institute, Kyoto University), Satoru Kojima(Department of Civil Engineering, Gifu University), Hiroshi YAGI(Faculty of Art, Science and Education, Yamagata University), Taro Uchida(National Institute for Land and Infrastructure Management), Chair:Takuma Watakabe(Graduate School of Science, Kyoto University)

3:45 PM - 4:00 PM

[HDS17-08] Detection of landslides using InSAR analysis all over Japan

*Masayuki Yamanaka1, Kozin Wada1, Hiroyuki Nkai1, Yuji Miura1, Takayuki Nakano1 (1.Geospatial Information Authority of Japan)

Keywords:InSAR, landslide, ALOS-2

In Interferometric SAR (InSAR), two observations are performed for the same site, using a SAR sensor onboard a satellite. The data obtained from both observations is transformed into an image through an interferometric processing to obtain phase differences. InSAR is Effective method for Monitoring of the landslide, because the SAR can observe the place where there is no ground observation equipment, and there are some reports about detection the landslide by InSAR.
The Geospatial Information Authority of Japan (GSI) has approached to monitor ground surface deformation of earthquake, volcanic activity, subsidence and landslide all over Japan by InSAR analysis using ALOS-2 (Daichi-2) /PALSAR-2 data, and succeeded in detecting many phase variation of landslide.
In this presentation, we report the result of comparing between InSAR analysis and field survey.