Effect of Rainfall Pattern on Slope Stability
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The impact of slope failure in Malaysia results in loss of life, property damage and disruption of societal and economic development. The objectives of this study are to determine the relationship between rainfall infiltration and slope stability and to estimate the factor of safety based on type and duration of rainfall. The analysis is conducted by using Limit Equilibrium Method (LEM) and SLOPE/W software. The results of the study are pore-water pressure and factor of safety during one-month analysis with simulated rainfall based on five years of historical records. The findings show that the highest factor of safety value is 1.6, while the lowest factor of safety value is 0.4 indicating a slope failure. It is significant how rainfall changes can critically affect slope stability based on the properties and existing geometry of the tropical soils. The study captures the behaviour of tropical slopes influenced by different rainfall characteristics.
Keywordsslope stability rainfall pattern pore-water pressure factor of safety
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The author would like to thank the people involved in the research project and acknowledge Universiti Kebangsaan Malaysia for financial support under the grant GGPM-2018-039.
- Au, S. (1998). Rain-induced slope instability in Hong Kong. Engineering Geology, 51, pp 11-36.Google Scholar
- Cai, F. and Ugai, K. (2004). Numerical Analysis of Rainfall Effects on Slope Stability. International Journal of Geomechanics, 4(2), pp 69-78.Google Scholar
- Chatra, A. S., Dodagoudar, G. R. and Maji, V. B. (2019). Numerical modelling of rainfall effects on the stability of soil slopes. International Journal of Geotechnical Engineering, 13(5), pp 425-437.Google Scholar
- Chen, H., Lee, C. and Law, K. (2004). Causative mechanisms of rainfall-induced fill slope failures. Journal of geotechnical and geoenvironmental engineering, 130(6), pp 593-602.Google Scholar
- Guzzetti, F., Peruccacci, S., Rossi, M. and Stark, C.P. (2007). Rainfall thresholds for the initiation of landslides in central and southern Europe. Meteorology and atmospheric physics, 98(3), pp 239-267.Google Scholar
- Hossain, J., Hossain, M. S. and Hoyos, L. R. (2013). Effect of Rainfall on Stability of Unsaturated Earth SlopesA Constructed on Expansive Clay. Geo-Congress 2013: Stability and Performance of Slopes and Embankments III. ASCE.Google Scholar
- Kristo, C., Rahardjo, H. and Satyanaga, A. (2017). Effect of variations in rainfall intensity on slope stability in Singapore. International Soil and Water Conservation Research, 5(4), pp 258-264.Google Scholar
- Mohd Taib, A., Taha, M. R. and Abang Hasbollah, D. Z. (2018). Validation of Numerical Modelling Techniques in Unsaturated Slope Behaviour. Jurnal Kejuruteraan, 5, Special Issue 1, pp 29-35.Google Scholar
- Rahardjo, H., Li, X. W., Toll, D. G. and Leong, E. C. (2001). The effect of antecedent rainfall on slope stability. Unsaturated Soil Concepts and Their Application in Geotechnical Practice. Springer, pp 371-399.Google Scholar
- Rahardjo, H., Nio, A. S., Leong, E. C. and Song, N. Y. (2010). Effects of groundwater table position and soil properties on stability of slope during rainfall. Journal of geotechnical and geoenvironmental engineering, 136(11), pp 1555-1564.Google Scholar
- Sagitaningrum, F. and Bahsan, E. (2017) Parametric study on the effect of rainfall pattern to slope stability. MATEC Web of Conferences, 101, 05005.Google Scholar
- Strauch, A. M., MacKenzie, R. A., Giardina, C. P. and Bruland, G. L. (2015) Climate driven changes to rainfall and streamflow patterns in a model tropical island hydrological system. Journal of Hydrology, 523, pp 160-169.Google Scholar
- Tan, S. B., Tan, S. L., Lim, T. L. and Yang, K. S. (1987). Landslide problems and their control in Singapore. Proc., 9th Southeast Asian Geotechnical Conf. on Geomechanics in Tropical Soils, Southeast Asian Geotechnical Society. Bangkok, Thailand.Google Scholar
- Trinh, M. T., Lee, G., Oh, S. and Nguyen, T. H. V. (2015). Effect of extreme rainfall on cut slope stability: case study in Yen Bai City, Viet Nam. Journal of the Korean Geoenvironmental Society, 16(4), 23-32.Google Scholar
- Wei, J., Heng, Y. S., Chow, W. C. and Chong, M. K. (1991). Landslides at Bukit Batok sports complex. Proc., 9th Asian Conf on Soil Mechanics and Foundation Engineering, Southeast Asian Geotechnical Society. Bkok, Thailand.Google Scholar