Recent Geomorphological changes of rock slopes in Hakuba-Daisekkei

Hirotaka Sugiyama; Chiyuki Narama; Hiroshi Inoue

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[J] Poster

M (Multidisciplinary and Interdisciplinary) » M-IS Intersection

[M-IS20] Mountain Science

Mon. May 27, 2019 5:15 PM - 6:30 PM Poster Hall (International Exhibition Hall8, Makuhari Messe)

convener:Keisuke Suzuki(Department of Environmental Sciences, Faculty of Science, Shinshu University), Yoshihiko Kariya(Department of Environmental Geography, Senshu University), Akihiko SASAKI(Department of Geography and Environmental Studies, Kokushikan University), Chiyuki Narama(Niigata University, Department of Science)

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[MIS20-P06] Recent Geomorphological changes of rock slopes in Hakuba-Daisekkei

*Hirotaka Sugiyama¹, Chiyuki Narama², Hiroshi Inoue³ (1.Graduate School of Science and Technology, Niigata University, 2.Faculty of Science, Niigata University, 3.National Reserch Institute for Earth Science and Disaster Resilience)

Keywords:rockfall, rock failure, Hakuba-Daisekkei, aerial-photography, SfM

To understand the geomorphological characteristics of slope failure points on rock slopes of the Daisekkei valley, we investigated the surface changes of rock slopes using three-dimensional topographic models based on SfM (structure from motion) with digital aerial images from airplane, drone (Phantom4) and Cessna. Slope failure points and these surface changes were extracted by comparing three-dimensional topographic models. For large slope failure in 2005, we clarified the rock mass of 60 m height and 10 m thickness was collapsed.