抄録
Non-welded pyroclastic deposits, so-called“shirasu”are widely distributed in South Kyushu. Slope disaster often occurs in this area due to heavy rain. So it is expected to make hazardmaps to predict such a disaster. There are many factors of slope failures; such as steepness of slope, slope type, landuse, vesitation, presence of air-fall deposits and so on.
We must judge from these factors that the slope may collapse or not. The estimation expertsystem such as“Cogito”is a good tool for these judgement.
