Abstract
Recently, design of public works in a landslide area trends to demand evaluation for landslide susceptibility from the viewpoint of prevention against disasters. A conventional method for this evaluation is carried out in the following manner. The first step is collection of data which characterize the feature of a landslide area with the aid of field survey, and secondly each area is empirically ranked for landslide susceptibility. However, this method requires such experience for landslide that of ten givse a different result of ranking in correspondence to the degree of experience. On the other hand, this paper proposes a new method applying the quantification theory to categorical data which are collected from field survey. A region of Shikoku district in Japan was dealt with, an evaluation map was obtained showing land slide susceptibility, and comparison was made between the present method and the conventional method. The result convictsus the reliability of the present method for evaluation of landslide susceptibility.
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