Relation between Snow Damage and Geographic Factor in Japanese Cedar Stands in Toyama Prefecture

Abstract

The relation between snow damage and geographic factor was analyzed by using regression tree in Japanese cedar (Cryptomeria D.Don) stands in Oyabe City that had received damage by the heavy snow in January, 2004. As a result, the percentage of damage tree in each stand was the highest in the leeward slope, and was high also in a gentle slope and a concave curvature. The percentage of the damage tree in each 10-m grid was estimated from a slope azimuth, a slope inclination, and a profile curvature, and the hazard map of the snow damage for Japanese cedar was made.