Japan Geoscience Union Meeting 2022

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[J] Oral

H (Human Geosciences ) » H-DS Disaster geosciences

[H-DS11] Geohazards in humid, tectonically active countries and their precursors

Mon. May 23, 2022 3:30 PM - 5:00 PM 201B (International Conference Hall, Makuhari Messe)

convener:Satoru Kojima(Department of Civil Engineering, Gifu University), convener:Taro Uchida(University of Tsukuba), Yoshihiko Kariya(Department of Environmental Geography, Senshu University), Chairperson:Taro Uchida(University of Tsukuba), Yoshihiko Kariya(Department of Environmental Geography, Senshu University), Satoru Kojima(Department of Civil Engineering, Gifu University)

3:45 PM - 4:00 PM

[HDS11-08] Evaluation of the potential risk of a sediment disaster at Kiyomizu-dera Temple area

*MASAMITSU FUJIMOTO1, KENICHIROU TODA2, YOSHIFUMI SATOFUKA1 (1.RITSUMEIKANN UNIVERSITY, 2.Nagano Prefecture Forestry Research Center)

Keywords:slope failure, sediment disaster, spring, CS (Curvature and Slope) topographical map

To evaluate the potential risk of sediment disasters at Kiyomizu-dera Temple, we investigated the spatial distribution of springs based on a topographical analysis using a Curvature and Slope (CS) topographical map. The study area was divided into two areas, erosion and non-erosion, divided by a fault line. We observed springs with small slope collapse at numerous points in the erosion area. Our results suggest deep infiltration of groundwater in the non-erosion area, and exfiltration of groundwater in the erosion area, leading to the occurrence of slope collapse.