ANALYSIS ON CHARACTERISTICS OF THE RAINFALLS CAUSING SLOPE FAILURES BASED ON ROUGH SET THEORY

Abstract

In this paper, the methodology for detecting critical properties using rough set theory is applied to the rainfall data in Yamaguchi prefecture, for the purpose of analyzing the relationship between rainfall and slope failures. It is shown that there exist two types of slope failures, “immediate failures” and “late failures, ” in andesite slopes. On the other hand, “late failures” and “accidental failures” could happen in granite slopes. The result of χ² test shows that there is no significant correlation between geological properties of slopes and the type of slope failures, in the data which can be obtained.