11:00 AM - 11:15 AM
[ACC28-08] Characteristics of the Yukishiro events and ground factor of slush avalanche on the eastern slope of Mount Fuji
Keywords:slush avalanche, slushflow, snow profile observation, ice layer, case study, disaster prediction
The author carried out field survey in the before and after of the day which were meteorological right condition in the eastern slope of Mt. Fuji. Following results were obtained,
- even if, there is enough snow accumulation, warm temperature and heavy rain with frozen ground (ice filled scoria and ash), non-occurence of Yukishiro is common.
- the occurrence tendency of slushflow from the bottom of small canyon and opened shallow valley is more frequent event rather than slush avalanche from the slope face.
- ice layer(s) have been widely existed in snow. However it was not observed in February 2014 after heavy snow accumulation.
According above mentioned feature, snow depth and existing the ice layer should be key condition of "Yukishiro".