Abstract
The model estimating potential slope failure using the fuzzy integral was applied to the four areas of a private forest in Gifu prefecture, Kyoto University forest in Wakayama, a public forest road in Shiga and Oita prefecture. The discriminant ratios by using the quantification 2 method using fixed category scores decreased very much when applied to these four areas. On the other hand, they did not decrease so much when the fuzzy integral was used. As a result, the discriminant ratios using the quantification 2 method and the fuzzy integral could be estimated at 62.3%, 69.8% for cutting slopes and 74.3%, 75.5% for banking slopes, respectively. In addition, the degree of importance to each factor could be changed and also the effective factors could be selected according to the coefficients of necessity when the fuzzy integral was used.
