Observations of outflow from the bottom of a snowpack on slope with a large-size snow lysimeter for the purpose of developing a prediction method for the glide avalanche release

2016 Fiscal Year Final Research Report

• Project/Area Number: 26560189
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Natural disaster / Disaster prevention science
• Research Institution: Niigata University
• Principal Investigator: Kawashima Katsuhisa 新潟大学, 災害・復興科学研究所, 教授 (40377205)
• Co-Investigator(Renkei-kenkyūsha): NOHGUCHI Yasuaki 国立研究開発法人防災科学技術研究所, アウトリーチ・国際研究推進センター, 契約専門員 (50360368)
• Research Collaborator: MATSUMOTO Takane
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 全層雪崩 / 発生予測 / 積雪グライド / 斜面ライシメータ / 積雪底面流出量

Outline of Final Research Achievements

This study primarily intended to optimize an unknown parameter used in a model for estimating outflow from the bottom of a snowpack in case it is applied to snowpack on slopes. Consequently, the fluctuation range of the parameter value was found to be considerably large, indicating that the improvement of model versatility requires the incorporation of effects of snowpack structure into the model. Although the relationship between outflows from the bottom of a snowpack and snow glide rates was not able to be clarified, the possible presence of the short-time forecast of glide avalanches was indicated by using the mathematical model for instability in snow gliding motion, proposed by Nohguchi (1989).

Free Research Field

雪氷防災学