Yukiken Snow Eaters Co.

Sapporo, Japan

Yukiken Snow Eaters Co.

Sapporo, Japan
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Arai N.,Nagoya University | Imai T.,Yukiken Snow Eaters Co. | Otsuki M.,Yukiken Snow Eaters Co. | Saito Y.,Yukiken Snow Eaters Co. | And 2 more authors.
Bulletin of Glaciological Research | Year: 2017

Infrasound observations can be used to measure the energy radiated by an avalanche into the atmosphere and detect avalanches over large areas. Accompanying significant improvements in avalanche dynamics research, the use of infrasound for avalanche monitoring has increased over the last few decades. Our research team conducted infrasound observations in Tokamachi, Niigata Prefecture, Japan, over the past few winter seasons. In the 2014-2015 winter season, we deployed three sensors spaced by 1-2 km in a triangular array and attempted to automatically extract signals associated with avalanches from the observed raw data using time-domain processing. The locations of avalanches were estimated from the extracted signals using the cross-correlation method. Twelve events were detected and located. The estimated locations were in an area with multiple steep slopes. An infrasound array monitoring system with real-time processing would be capable of providing significant amounts of information concerning avalanche activity in snow-covered regions. © Japanese Society of Snow and Ice.


Tominaga Y.,Niigata Institute of Technology | Mochida A.,Tohoku University | Okaze T.,Tohoku University | Sato T.,Japan National Research Institute for Earth Science and Disaster Prevention | And 7 more authors.
Journal of Wind Engineering and Industrial Aerodynamics | Year: 2011

A system has been developed for predicting snow distribution in built-up environments. This system combines a mesoscale meteorological model that predicts precipitation, including snowfall in an area, and a Computational Fluid Dynamics (CFD) model that predicts snow phenomena on building scale. The system focuses on snow distribution around buildings, which often leads to snow disaster and snow-related difficulties in urban areas. It can be used for predicting snow distribution due to snowfall and snowdrift in a development area and is expected to be a useful design tool for city and architectural planning in snowy regions. This paper outlines the system and examines its performance by comparing its results with measured data. The snowdrift patterns, i.e. erosion around the upwind corners and deposition in front of and behind a building, obtained by the present model show good correspondence with those obtained from field observation. However, the model under-predicted the decrease of snow depth near the building. Further investigations required to comprehensively evaluate the prediction accuracy of the system are discussed. © 2010 Elsevier Ltd.


Saito Y.,Yukiken Snow Eaters Co. | Kato H.,Hokkaido University | Otsuki M.,Yukiken Snow Eaters Co. | Kimura I.,Hokkaido University | And 2 more authors.
Annals of Glaciology | Year: 2012

This paper considers the possible commercial viability of applying the moving particle semiimplicit (MPS) method to avalanches. The MPS method is a powerful tool for reproducing the flow phenomenon with large-scale surface deformation. In order to apply this method to snow avalanches, we modified the original model to introduce constitutive equations of Bingham fluid, dilatant fluid and the erosion-deposition process. The modified model was applied to some cases and evaluated through comparison with experimental results and observed data. © 2013 Publishing Technology.

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