A running path of avalanche and its velocity on the surface with complex geometrical slope are analyzed using the method presented by Dr. Nohguchi. The running path depends on a starting point or resistance coefficient against the avalanche, which are treated as uncertainties. In this study, we calculated the distribution of impulsive force acting on avalanche protective structure. The running path of avalanche in the analysis was in good agreement with the path obtained from the observed data. We could obtain statistical parameters of avalanche on structural safety and design, and evaluated the reliability of the avalanche protective structure.
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