Parametric study on the effect of rainfall pattern to slope stability

Fathiyah Hakim Sagitaningrum, Erly Bahsan

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)

Abstract

Landslide in Indonesia usually occurs during the rainy seasons. Previous studies showed that rainfall infiltration has a great effect on the factor of safety (FS) of slopes. This research focused on the effect of rainfall pattern on the FS of unsaturated slope with different slope angle i.e.: 30°, 45°, and 60°. Three different rainfall patterns, which are normal, advanced, and delayed were considered in the analysis. The effects of low or high hydraulic conductivity of the soil are also observed. The analyses were conducted with SEEP/W for the seepage and SLOPE/W for the slope stability. It is found that the lowest FS for gentle slope is reached under the application of advanced rainfall pattern and the lowest FS for steep slope is reached under the application of delayed rainfall pattern. Reduction of FS is known to be the largest for gentle slope rather than steep slope due to negative pore water pressure reduction and the rising of ground water level. The largest FS reduction caused by rainfall was achieved for gentle slope under advanced rainfall pattern.

Original languageEnglish
Article number05005
JournalMATEC Web of Conferences
Volume101
DOIs
Publication statusPublished - 9 Mar 2017
Event1st Sriwijaya International Conference on Engineering, Science and Technology, SICEST 2016 - Bangka Island, Indonesia
Duration: 9 Nov 201610 Nov 2016

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