Effect of Dike Width on Pore Pressure and Water Content Evolution During Overtopping Conditions
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The failure of dike embankments due to overtopping flow plays a crucial role in understanding the mechanisms behind dike erosion, which is essential for effective disaster mitigation. The "SLIDE" program was used to analyze the transient response of pore water pressure (PWP) and volumetric water content (VWC) within a homogeneous coarse sand bed. The authors have previously examined the use of seepage-control elements in 3D simulations of embankment breach failures due to overtopping, conducted in laboratory flumes at the University of Science of Malaysia. In this study, pore water pressure (PWP) and volumetric water content (VWC) were measured at various points beneath the crest and along both the upstream and downstream slopes for three different dike crest widths: 7 cm, 12 cm, and 18 cm. This paper also presents a factor of safety (FOS) analysis across the unsaturated–saturated zones within the dike embankment during the events of overtopping moments until full saturation of the downstream slope. The results indicate that increases in both PWP and VWC occurred across all test groups along the slopes. Narrower crest widths led to higher pore water pressure at the onset of overtopping, while wider crest widths resulted in increased pore pressure toward the end of the erosion process. A reduction in the factor of safety was observed along the crest and downstream slope. However, in dikes with wider crest widths, the length of the embankment decreased due to prolonged flow discharge through the downstream toe and remnants of the upstream slope. The transient flow and slope stability results provide new insights into the coupled hydromechanical behavior of dike soil during overtopping events.
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[1] Wan Ariffin, W. N. H., Sidek, L. M., Basri, H., Idros, N., Adrian, M. T., Ghani, N. H. A., Khambali, H. M., Omar, S. M. A., Khebir, M. I. A., & Ahmed, A. N. (2025). Overtopping risk of high-hazard embankment dam under climate change condition. PLoS ONE, 20(2), 0311181. doi:10.1371/journal.pone.0311181.
[2] Gebremariam, F. T., Tesfay, A. H., Sigtryggsdóttir, F. G., Goitom, H., & Lia, L. (2025). Overtopping-Induced Embankment Breaching Experiments: State-of-the-Art Review on Measurement and Instrumentation. Water (Switzerland), 17(7), 1051. doi:10.3390/w17071051.
[3] Athani, S. S., Shivamanth, Solanki, C. H., & Dodagoudar, G. R. (2015). Seepage and Stability Analyses of Earth Dam Using Finite Element Method. Aquatic Procedia, 4, 876–883. doi:10.1016/j.aqpro.2015.02.110.
[4] Ahmed, S., Emmanuel, F., & Nyong Wilson, U. (2023). Finite Element Method of Seepage and Stability Analysis of Saura-Keffi Earth Dam. Malaysian Journal of Civil Engineering, 35(1), 53–61. doi:10.11113/mjce.v35.19591.
[5] van Bergeijk, V. M., Verdonk, V. A., Warmink, J. J., & Hulscher, S. J. M. H. (2021). The cross-dike failure probability by wave overtopping over grass-covered and damaged dikes. Water (Switzerland), 13(5), 1–22. doi:10.3390/w13050690.
[6] Jin, Y., Wang, W., Kamath, A., & Bihs, H. (2022). Numerical Investigation on Wave-Overtopping at a Double-Dike Defence Structure in Response to Climate Change-Induced Sea Level Rise. Fluids, 7(9), 295. doi:10.3390/fluids7090295.
[7] Graziano, A. A., Halso, M. C., Boes, R. M., Macchione, F., & Vetsch, D. F. (2025). Flood hazard assessment due to dam breaching considering river morphodynamics. Natural Hazards, 121(18), 21633–21663. doi:10.1007/s11069-025-07658-6.
[8] Ionescu, C. S., Gogoașe-Nistoran, D. E., Baciu, C. A., Cozma, A., Motovilnic, I., & Brașovanu, L. (2025). The Impact of a Clay-Core Embankment Dam Break on the Flood Wave Characteristics. Hydrology, 12(3), 56. doi:10.3390/hydrology12030056.
[9] Saberi, O., & Zenz, G. (2016). Numerical Investigation on 1D and 2D Embankment Dams Failure Due to Overtopping Flow. International Journal of Hydraulic Engineering, 2016(1), 9–18. doi:10.5923/J.IJHE.20160501.02.
[10] Zuo, Y. M., Zhou, J. W., Li, H. B., Zhang, J. Y., Tan, C., Wang, X. D., Wang, Y. S., & Zhou, Y. (2024). Overtopping Failure Process and Core Wall Fracture Mechanism of a New Concrete Core Wall Dam. KSCE Journal of Civil Engineering, 28(5), 1753–1766. doi:10.1007/s12205-024-0951-5.
[11] Omar, P. J., Gaur, S., & Dikshit, P. K. S. (2021). Conceptualization and development of multi-layered groundwater model in transient condition. Applied Water Science, 11(10), 162. doi:10.1007/s13201-021-01485-3.
[12] Gao, D., Pan, X., Liang, B., Yang, B., Wu, G., & Wang, Z. (2024). A Review and Design Principle of Fixed-Bottom Foundation Scour Protection Schemes for Offshore Wind Energy. Journal of Marine Science and Engineering, 12(4), 660. doi:10.3390/jmse12040660.
[13] Iqbal, S., & Tanaka, N. (2023). An Experimental Investigation on Dike Stabilization against Floods. Geosciences (Switzerland), 13(10), 1–19. doi:10.3390/geosciences13100307.
[14] Young, J. C., Arthur, R., Spruce, M., & Williams, H. T. P. (2022). Social sensing of flood impacts in India: A case study of Kerala 2018. International Journal of Disaster Risk Reduction, 74, 102908. doi:10.1016/j.ijdrr.2022.102908.
[15] Francalanci, S., Parker, G., & Solari, L. (2008). Effect of Seepage-Induced Nonhydrostatic Pressure Distribution on Bed-Load Transport and Bed Morphodynamics. Journal of Hydraulic Engineering, 134(4), 378–389. doi:10.1061/(asce)0733-9429(2008)134:4(378).
[16] Lu, Y., Chiew, Y. M., & Cheng, N. S. (2008). Review of seepage effects on turbulent open-channel flow and sediment entrainment. Journal of Hydraulic Research, 46(4), 476–488. doi:10.3826/jhr.2008.2942.
[17] Omar, P. J., Shivhare, N., Dwivedi, S. B., & Dikshit, P. K. S. (2022). Identification of soil erosion-prone zone utilizing geo-informatics techniques and WSPM model. Sustainable Water Resources Management, 8(3), 1–13. doi:10.1007/s40899-022-00654-9.
[18] Khan, M. A., Sharma, N., Pu, J. H., Pandey, M., & Azamathulla, H. (2022). Experimental observation of turbulent structure at region surrounding the mid-channel braid bar. Marine Georesources & Geotechnology, 40(4), 448–461. doi:10.1080/1064119X.2021.1906366.
[19] Ghonim, M. T., Jatwary, A., Mowafy, M. H., Zelenakova, M., Abd-Elhamid, H. F., Omara, H., & Eldeeb, H. M. (2024). Estimating the Peak Outflow and Maximum Erosion Rate during the Breach of Embankment Dam. Water (Switzerland), 16(3), 399. doi:10.3390/w16030399.
[20] Al-Riffai, M., & Nistor, I. (2010). Impact and analysis of geotechnical processes on earthfill dam breaching. Natural Hazards, 55(1), 15–27. doi:10.1007/s11069-010-9586-6.
[21] Urbaniak, M., Zamiar, K., & Kostecki, S. (2024). Understanding Geotechnical Embankment Washout Due to Overtopping: Insights from Physical Tests. Studia Geotechnica et Mechanica, 46(4), 328–336. doi:10.2478/sgem-2024-0025.
[22] Koshiba, T., Ono, S., Yamanoi, K., & Kawaike, K. (2024). Overtopping-induced levee breaches considering heterogeneous levee materials and outside flow. Hydrological Research Letters, 18(1), 22–27. doi:10.3178/hrl.18.22.
[23] Altomare, C., & Gironella, X. (2024). Characterization of Overtopping Volumes from Focused Wave Groups over Smooth Dikes with an Emerged Toe: Insights from Physical Model Tests. Journal of Marine Science and Engineering, 12(7), 1143. doi:10.3390/jmse12071143.
[24] van der Meer, J., Hardeman, B., Valk, J., Versteeg, S., Huis, M., Halter, W., ... & Mom, R. (2025). Improving Transitions At Grass Covered Dike Slopes Using the Wave Overtopping Simulator. Coastal Engineering Proceedings, 38(38), 22. doi:10.9753/icce.v38.papers.22.
[25] Pontillo, M., Schmocker, L., Greco, M., & Hager, W. H. (2010). 1D numerical evaluation of dike erosion due to overtopping. Journal of Hydraulic Research, 48(5), 573–582. doi:10.1080/00221686.2010.507005.
[26] Mares-Nasarre, P., Molines, J., Gómez-Martín, M. E., & Medina, J. R. (2021). Explicit Neural Network-derived formula for overtopping flow on mound breakwaters in depth-limited breaking wave conditions. Coastal Engineering, 164, 103810. doi:10.1016/j.coastaleng.2020.103810.
[27] Alqawasmeh, H. M. (2025). Simplified and Rapid Modeling of Road Embankments Slope Safety Factor Using Regularized Regression Techniques. Civil Engineering Journal, 11(9), 3873–3886. doi:10.28991/CEJ-2025-011-09-019.
[28] Gotoh, H., Ikari, H., Tanioka, H., & Yamamoto, K. (2008). Numerical Simulation of River-Embankment Erosion Due to Overflow by Particle Method. Proceedings of Hydraulic Engineering, 52, 979–984. doi:10.2208/prohe.52.979.
[29] Gupta, L. K., Pandey, M., & Raj, P. A. (2025). Numerical modeling of scour and erosion processes around spur dike. Clean - Soil, Air, Water, 53(3), 1–11. doi:10.1002/clen.202300135.
[30] Wu, H., & Zhao, K. (2025). Influence of soil porosity on hydraulic properties in dike failure induced by overtopping. Scientific Reports, 15(1), 16173. doi:10.1038/s41598-025-99699-x.
[31] Chen, W., Warmink, J. J., van Gent, M. R. A., & Hulscher, S. J. M. H. (2021). Numerical modelling of wave overtopping at dikes using OpenFOAM®. Coastal Engineering, 166(9), 103890. doi:10.1016/j.coastaleng.2021.103890.
[32] Hassan, M. A., & Mohamad Ismail, M. A. (2018). Effect of Soil Types on The Development of Matric Suction and Volumetric Water Content for Dike Embankment During Overtopping Tests. Civil Engineering Journal, 4(3), 668–688. doi:10.28991/cej-0309124.
[33] Prakoso, W. A., Hamdany, A. H., Wijaya, M., Ramadhan, R. I., Adinegara, A. W., Satyanaga, A., Adiguna, G. A., & Kim, J. (2025). Measurement of Soil–Water Characteristic Curve of Vegetative Soil Using Polymer-Based Tensiometer for Maintaining Environmental Sustainability. Sustainability (Switzerland), 17(1), 218. doi:10.3390/su17010218.
[34] Krisnanto, S., Rifdah, S. A., Ananda, A. A., & Putri, N. A. (2025). Analysis of the Stress State Variables for Unsaturated Soils with Compressible and Incompressible Soil Solids. International Journal of GEOMATE, 28(125), 92–100. doi:10.21660/2025.125.4734.
[35] Kang, Y.M., Yang, M.C., & Hu Y.X. (2006). Mixed Analysis on slope stability by limit equilibrium method and finite element method. China Mining Magazine, 15(3), 74-77. doi:10.3969/j.issn.1004-4051.2006.03.021.
[36] Duan, Z., Chen, J., Xie, J., Li, Q., Zhang, H., & Chen, C. (2024). Study on the Evolution Characteristics of Dam Failure Due to Flood Overtopping of Tailings Ponds. Water (Switzerland), 16(17), 2406. doi:10.3390/w16172406.
[37] Verwaest, T., Vanpoucke, P., Willems, M., & De Mulder, T. (2011). Waves Overtopping a Wide-Crested Dike. Coastal Engineering Proceedings, 1(32), 7. doi:10.9753/icce.v32.structures.7.
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