SLOPE HAZARD PROBABILITY INVOLVING RETURN PERIOD OF EXTREME PRECIPITATION

Abstract

Slope hazard with event probability is shown in consideration of the change of precipitation condition in the Tohoku district. A multiple logistic regression analysis contributes to the analysis model, which has the condition of geography, geology and gradient of hydraulic head as explaining variables. Hydraulic gradient varies extremely depending on the extreme precipitation. The results made a hazard map with 1km² mesh size and indicated quantitative distribution of slope hazard successfully in the Tohoku district.