Abstract
Intense rainfall conditions and seismic activity commonly trigger fluidised landslides which are characterized by rapid movement and long run-out. They are potentially a very dangerous form of landslide phenomena and may result in extensive damage due to their sudden movement. Until now, photogrammetry has been used to produce maps and investigate such landslides in areas where these disasters occur. Recently, however, airborne laser scanning technology has become a promising technique for making topographical maps and investigating the micro topographic details of these landslide disasters, particularly on slopes around urban areas where the potential risk is high. In this study, airborne laser scanning was carried out in the Tama Hills, near Tokyo, Japan, which is extensively affected by this type of landsliding. The effectiveness of this technique was tested and compared with a laser contour map and aerial photograph interpretations.
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Acknowledgements
The authors express their gratitude to Mr. Kaoru Orimo and Ms. Miwa Abe at Kokusai Kogyo Co. Ltd. for the airborne laser scanning data and preparing figures, also Mr. Tamotsu Nakajima at Aero Asahi Co. Ltd. who helped in assembling the figures. This study was carried out as part of the ‘Study on the Mechanism and Areal Prediction of Earthquake and Rainfall Induced Rapid and Long-Travelling Flow-Phenomena (APERIF)’. It was funded by the Special Coordination Fund for the Promotion of Science and Technology, granted by the Ministry of Education, Culture, Sports, Science and Technology of Japan (MEXT). Finally, Dr. Maia Ibsen is greatly thanked for her comments and efforts in sharpening this paper.
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Sekiguchi, T., Sato, H.P. Mapping of micro topography using airborne laser scanning. Landslides 1, 195–202 (2004). https://doi.org/10.1007/s10346-004-0021-5
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DOI: https://doi.org/10.1007/s10346-004-0021-5