Seiki KAWAGOE, So KAZAMA and Masaki SAWAMOTO 1 ( ) ( 980-8579 6-6-20 2 ( ) ( 980-8579 6-6-20) 3 ( 980-8579 6-6-06) The Probability and the road damage due to sediment hazard caused by snowmelt were analyzed by use of the risk model. The risk model was applied by a multiple logistic regression analysis based on past hazard conditions. We set conditions of geology, relief energy and hydraulic gradient as the necessary variables. Hydraulic gradient was analyzed by infiltration analysis with

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... ration of snowmelt. Snowmelt conditions were obtained by SWE (Snow Water Equivalent) model. The Probability and the road damage in the Tohoku region are shown in map with 1km 2 resolutions. This map shows spatial-temporal risk distribution of sediment hazard.