Abstract
In this paper, non-woven filters were installed on a slope in a landslide hazard warning area north of Tokuyama National College of Technology in Shunan City, Yamaguchi Prefecture. Rainfall and volumetric water content were measured in sections with and without the non-woven filters. As a result, the relationship between rainfall and slope failure was clarified. Furthermore, numerical analysis using the rainfall seepage model proposed by Tsubogo et al. confirmed that the results of the numerical analysis agreed well with the measured values when the non-woven filters were installed. On the other hand, in the sections where the bare ground was installed, the results of the numerical analysis agreed with the measured values until the collapse, but the agreement tended to decrease after the collapse.
