| Summary: |
The study is focused on the investigation of effect the characterization of SWRC model and its
effect on the slope stability on a simple infinite slope. The SWRC models were fitted to the laboratory test
using mini tensiometer and filter paper. In particular, four unimodal SWRC models were evaluated for
comparison in this study, i.e. van Genuchten model (VG), modified van Genuchten model (MVG), Brooks-
Corey model (BC), and Kosugi log-normal model (KLN). The slope stability analysis was conducted in
terms of Factor of Safety (FS) by applying the infinite slope model incorporating infiltration model. The
infiltration model was analyzed by Richard’s one-dimensional infiltration equation. The analysis resulted
that The VG and KLN models produced lower estimation of safety factor than BC and MVG models. The
distribution of pore water pressure varied with the SWRC models. Hence, different SWRC model contribute
different FS values. The results indicate that the SWRC model shall be applied carefully since the model will
have a different conclusion to the slope instability.
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