Abstract
Recently, landslides to form the landslide dam and to show the long runout distance more than double of landslide length are observed by a large scale of earthquake. The long runout distance landslides to move bring the damage of the large scale for human life and social activity because of their widely spread flow down and the accumulated soil. The analysis of the landslide phenomena to make long runout distance movement must analyze the advection equation showing high moving velocity of landslide mass, however the landslide at early stage is in block and then landslide become the crushed flow according to travel to flow down afterwards. Therefore, we examine analytical method to predict the runout distance area of the landslide earth mass in consideration of a condition of the crushed fluidity by the Mohr-Coulomb theory criteria. We show the analytical precision and high utility of the presented method in comparison with model analysis and long runout distance of actual landslide.
