Abstract
A simplified evaluation method of the surface area and volume of coastal forest trees is proposed by using the Pipe Model based on the physiology of the vegetation. When inundation depth is higher than the tree height, the surface area and volume of tree evaluated by this method were simply determined by the height and diameter of tree. In addition, coastal forest trees' lodging resistance to a reproduced inundated flow by tsunami was investigated. The result of examination was equivalent or smaller than conventional values used for river channels. A quantitative evaluation of coastal forest trees' lodging resistance to tsunami was suggested.
