Development of Groundwater Level Fluctuation Response System Subjected to Rainfall for Slope Stability Forecasting
DOI:
https://doi.org/10.1007/s12594-020-1611-0Keywords:
No Keywords.Abstract
The rise of groundwater level in slope due to intense rainfall is one of the factors that can trigger slope failure. The groundwater level rise causes increase in the pore water pressure thus reducing the shear resistance of the soil. The purpose of this study is to present a groundwater level evaluation system in response to daily rainfall for slope stability forecasting. The system consists of three important components namely the conceptual multi tank model, unsaturated-saturated seepage flow analysis and stability analysis. The conceptual multi tank model was initially used to determine the fluctuations of groundwater level followed by the unsaturated-saturated seepage flow analysis to determine the pore water pressure distribution in the slope. Finally, the variation in factor of safety for the slope was determined by stability analysis corresponding to the seepage flow results. The performance of the evaluation system was demonstrated using a case study in Putrajaya, Malaysia. From this study, an early warning system can be developed for slope stability which is essential for disaster prevention during rainfall.Downloads
Metrics
Issue
Section
Downloads
Published
How to Cite
References
Fredlund, D.G., Krahn, J., and Pufhal, D. E. (1981) The relationship between limit equilibrium slope stability methods. In: Proc. Internat. Conf. Soil Mechanics and Foundation Engg., v.3, pp.409-416.
Fredlund, D.G. and Xing, A. (1994) Equations for the soil water characteristics curve. Canadian Geotech. Jour., v.31(4), pp.521-532.
Fredlund, D.G., Xing, A., and Huang, S. (1994) Predicting the permeability function for unsaturated soils using the soil-water characteristic curve. Canadian Geotech Jour, v.31(4), pp.533-546.
Göktepe, F. and Keskin, I. (2018) A comparison study between traditional and finite element methods for slope stability evaluations. Jour. Geol. Soc. India, v.91(3), pp.373-379.
Krahn, J. (2004) Seepage modeling with SEEP/W: An engineering methodology., GEO-SLOPE International Ltd. Calgary, Alberta, Canada.
Li, A.G., Yue, Z.Q., Tham, L.G., Lee, C.F. and Law, K.T. (2005) Field-monitored variations of soil moisture and matric suction in a saprolite slope. Canadian Geotech. Jour., v.42(1), pp.13-26.
Li, L.C., Tang, C.A., Zhu, W.C. and Liang, Z.Z. (2009) Numerical analysis of slope stability based on the gravity increase method. Computers and Geotechnics, v.36(7), pp.1246-1258.
Mukhlisin, M., Baidillah, M. R., Ibrahim, A. and Taha, M. R. (2014) Effect of soil hydraulic properties model on slope stability analysis based on strength reduction method. Jour. Geol Soc India, v.83(5), pp.586-594.
Ng, C. W. and Shi, Q. (1998) A numerical investigation of the stability of unsaturated soil slopes subjected to transient seepage. Computers and Geotechnics, v.22(1), pp.1-28.
Koyama, T., Takahashi, K., Ramli, M., and Ohnishi, Y. (2008) Slope Stability Analysis Using Coupled Tank Model and Saturated-unsaturated Flow Simulations. In: 3rd Taiwan-Japan Joint Workshop on Geotechnical Natural Hazards. Keelung, Taiwan, pp.1-10.
Sugawara, M. (1995) Tank model. Computer models of watershed hydrology, pp.165-214.
Tsaparas, I., Rahardjo, H., Toll, D. G., and Leong, E. C. (2002) Controlling parameters for rainfall-induced landslides. Computers and Geotechnics, v.29(1), pp.1-27.
Zhang, L.L., Zhang, J., Zhang, L.M. and Tang, W.H. (2011) Stability analysis of rainfall-induced slope failure: a review. Proc. Institution of Civil Engineers-Geotechnical Engineering, v.164(5), pp.299-316.