Japan Geoscience Union Meeting 2021

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[E] Oral

H (Human Geosciences ) » H-TT Technology & Techniques

[H-TT30] GEOMORPHOLOGICAL APPLICATIONS OF HIGH-DEFINITION TOPOGRAPHY AND GEOPHYSICAL DATA IN THE ANTHROPOCENE

Fri. Jun 4, 2021 1:45 PM - 3:15 PM Ch.14 (Zoom Room 14)

convener:Yuichi S. Hayakawa(Faculty of Environmental Earth Science, Hokkaido University), Tsuyoshi Hattanji(Faculty of Life and Environmental Sciences, University of Tsukuba), Shigekazu Kusumoto(Institute for Geothermal Sciences, Graduate School of Science, Kyoto University), A Christopher Gomez(Kobe University Faculty of Maritime Sciences Volcanic Risk at Sea Research Group), Masayuki Seto(Fukushima Future Center for Regional Revitalization, Fukushima University), Chairperson:Yuichi S. Hayakawa(Faculty of Environmental Earth Science, Hokkaido University), Tsuyoshi Hattanji(Faculty of Life and Environmental Sciences, University of Tsukuba)

2:00 PM - 2:15 PM

[HTT30-02] Rapid vegetation recovery at landslide scars detected by multitemporal high-definition data

*Hitoshi SAITO1, Shoichiro Uchiyama2, Koki Teshirogi3 (1.College of Economics, Kanto Gakuin University, 2.National Research Institute for Earth Science and Disaster Resilience, 3.Setsunan University)

Keywords:Landslide, Vegetation recovery, High-definition topography, Micro satellite, UAV

Vegetation cover is an important factor for hillslope stability and landslide susceptibility. We explore vegetation recovery at landslide scars at the Aso volcano in Japan using multitemporal high-definition topographic data from UAV and micro satellites from 2010 to 2020. The study area has frequently experienced coseismic- and rainfall-induced landslide events. Results show rapid vegetation recovery at both the rainfall-induced and the coseismic landslide scars. However, site-specific vegetation recovery was determined primarily by topographic parameters, such as slope angle and direction at the local scale.