Environmental conditions for debris flows from the northeast slope of Mt. Shakushi flowing on the Hakuba Daisekkei perennial snow patch.

Serina Takaki; Chiyuki Narama

Presentation information

[J] Oral

M (Multidisciplinary and Interdisciplinary) » M-IS Intersection

[M-IS12] Mountain Science

Thu. May 29, 2025 9:00 AM - 10:30 AM 102 (International Conference Hall, Makuhari Messe)

convener:Akihiko SASAKI(Department of Geography and Environmental Studies, Kokushikan University), Motoshi Nishimura(Interdisciplinary Cluster for Cutting Edge Research, Institute for Mountain Science, Shinshu University), Asaka Konno(Tokoha University), Chairperson:Akihiko SASAKI(Department of Geography and Environmental Studies, Kokushikan University), Takushi KOYAMA(Faculty of Letters,Kokushikan University)

10:00 AM - 10:15 AM

[MIS12-05] Environmental conditions for debris flows from the northeast slope of Mt. Shakushi flowing on the Hakuba Daisekkei perennial snow patch.

Serina Takaki¹, *Chiyuki Narama² (1.Niigata University, Graduate School of Science and Technology, 2.Niigata University, Program of Field Research in the Environmental Sciences)

Keywords:debris flow, heavy snowfall region, Hakuba Daisekkei, northern Japanese Alps

On August 23, 2013, a debris flow occurred on the Hakuba Daisekkei snow patch, one of Japan's three largest perennial snow patches located in the northern part of the Hida Mountains. The debris flow originated from the northeast slope of Mt. Shakushi and traveled approximately 1 km down on the Daisekkei. This study aimed to elucidate the annual and seasonal changes in sediment storage in the valley channels, as well as to examine the sediment transport processes and environmental conditions leading to debris flow occurrence on the Daisekkei.