Earth Surface Dynamics
Earth Surface Dynamics
ESurf
Articles | Volume 9, issue 6
Articles | Volume 9, issue 6
https://doi.org/10.5194/esurf-9-1381-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/esurf-9-1381-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 9, issue 6
Research article
 | 
02 Nov 2021
Research article |  | 02 Nov 2021

Temporal changes in the debris flow threshold under the effects of ground freezing and sediment storage on Mt. Fuji

Fumitoshi Imaizumi, Atsushi Ikeda, Kazuki Yamamoto, and Okihiro Ohsaka

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Short summary
The rainfall threshold for debris flow occurrence was evaluated on Mt. Fuji, Japan. Debris flows during frozen periods were triggered by a smaller magnitude of rainfall than during unfrozen periods. During unfrozen periods, the threshold of maximum hourly rainfall intensity triggering debris flow was higher when the volume of channel deposits was larger. The results suggest that the occurrence of frozen ground needs to be monitored for better debris flow disaster mitigation in cold regions.
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