REMOTE SENSING OBSERVATIONS OF LANDSLIDES AND GROUND DEFORMATION FROM THE 2004 NIIGATA KEN CHUETSU EARTHQUAKE(<Special Issue>Geotechnical Disasters in 2004 and 2005)

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概要

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• In recent years, major developments in remote sensing have made it possible to use these technologies to document the effects of earthquakes. Specifically, high-resolution satellite imagery and three-dimensional laser scanning (LIDAR) can provide important observations of earthquake damage that supplement traditional observations from field reconnaissance. The 2004 Niigata Ken Chuetsu earthquake provided an opportunity to use remote sensing to document the distribution of landslides in the epicentral region through the use of high-resolution satellite imagery and to document the detailed three-dimensional geometries of several failures using LIDAR. The satellite imagery was acquired the day after the earthquake, but at very large acquisition angles that resulted in image distortion. Nonetheless, the satellite imagery accurately identified the landslide distribution in the epicentral region, although the total area of landslides was underestimated by about 25% as compared with traditional aerial reconnaissance because of the large acquisition angle for the satellite imagery. Terrestrial LIDAR was used to collect three-dimensional data at several failure sites, including two large rock slides and a railroad tunnel portal affected by ground deformation. The LIDAR data allowed for precise measurement of failure deformations and geometries, and provided digital terrain models that could be archived and used in future analyses. In the future, satellite imagery and LIDAR, as well as other remote sensing technologies, will play an increasing role in documenting and understanding the effects of earthquakes.

• 社団法人地盤工学会の論文

著者

• Rathje Ellen

  University Of Texas At Austin

• Kayen Robert

  U.s. Geological Survey

• WOO KYU-SEOK

  University of Texas at Austin

関連論文

• Ground-penetrating radar data of the 1999 surface rupture in Taiwan
• REMOTE SENSING OBSERVATIONS OF LANDSLIDES AND GROUND DEFORMATION FROM THE 2004 NIIGATA KEN CHUETSU EARTHQUAKE(Geotechnical Disasters in 2004 and 2005)

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