1. Sensors and Acquisition Technologies
Application of 3D Laser Mapping and HEM using UAV for the Landslide Investigation of the Mid Niigata Prefecture Earthquake
Nakayama Fumiya(1), Masahiko Nagai(2), Seiichiro Kuroda(3), Youichi Yuuki(1) and Koyo Hatakeyama(1)
(1) Oyo Corporation, Geotechnical Center, Japan. (2) The University of Tokyo, Center for Spatial Information Science, Japan. (3) National Institute for Rural Engineering, Department of Geotechnical Engineering, Japan.
Abstract
In landslide investigation of the Mid Niigata Prefecture earthquake, the OYO mini-borne system and the 3D laser and CCD mapping system which used the Unmanned Aerial Vehicles Helicopter was carried out. After these surveys, the drilling survey was carried out, and the result was compared with the OYO mini-borne survey result. This site was formed the steep slope by landslide which have approximately 200m width and 70 degrees of maximum inclination due to the earthquake collapses, and the entry to this slope by foot is difficult. Then, the survey of this landslide from air by noncontact was carried out, and the resistivity distribution, geographical features, and the actual image of the ground surface were obtained. From drilling survey, it was obtain the colluvial deposit was distributed on the base of mudstone subject as a result, and it was presumed from the result of this drilling and the 3D laser and CCD mapping system that the boundary was a glide plane. On the other hand, the high resistivity belt was distributed from the result of the mini-borne survey on the low resistivity belt, and the boundary depth was almost corresponding to the drilling survey. As a result, three dimensions on landslide distribution obtained, and the effectiveness of the mini-borne system and 3D laser and CCD mapping system in the steep slope survey was confirmed.
Last modified: Thu May 25 17:29:20 2006