Proj
J-GLOBAL ID:200904095034637725  Research Project code:0150002609 Update date:Mar. 16, 2001

Survey on development of procedure to explore weak layers to cause surface snowslide

表層雪崩の誘因となる弱層の探査手法開発に関する調査
Study period:1999 - 0
Research overview:
Currently operated is a system of estimating breakout time and scale of snowslide through risk judgment by calculating risk index of surface avalanche for the purpose of preventing snow disaster beforehand, but a delay of improvement in accuracy is its actual state, and its major cause is the fact that risk judgment has not considered if existence of weak layer to be a cause of developing surface avalanche. If whether or not the weak layer is in snow and its intensity could automatically and continuously be measured, accuracy of estimating breakout of surface avalanche can become improved.In the present survey, we radiated snow surface with a supersonic and analyzed, in order to detect whether the weak layer is or not on the snow surface that becomes a drive of surface avalanche, on judgment of snow quality on the snow surface from characteristics of its reflected wave.
Research program: Ordinary Research
Ministry with control over the research :
Ministry of Land, Infrastructure, Transport and Tourism
Organization with control over the research:
Public Works Research Institute

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