• Mohammad Bagher Imani

  • Ehsan Delavari

  • Shamsa Basirat

  • Mohsen Saadat

  1. Department of Civil Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran

Abstract

This study experimentally investigates how specific factors, such as the arrangement of concrete cylinders, ramp angle, and the presence or absence of a downstream barrier, influence shock wave characteristics to improve risk prediction accuracy. To do this, three models were considered: two sequential, distant pairs of cylinders (Model 1); two sequential, adjacent pairs of cylinders (Model 2); and four sequential, separate cylinders (Model 3). The concrete cylinders were released into the tank in different models and at three different slopes, either with a downstream barrier or without. The results showed that, when using a downstream barrier, the maximum wave height in models 1, 2, and 3 decreased by 14.5%, 10.5%, and 8.63%, respectively, at three different angles. Comparing results for a particular angle revealed that waves generated by model 3 had higher values in wave height, length, and amplitude among all models. Additionally, the maximum water level fluctuations in Model 3 were 10.1% and 5.4% higher than those in Models 2 and 1, respectively. Increasing the ramp angle in Model 3 raised the wave height by 14.4%.

Keywords

Subjects

Ataie-Ashtiani, B., & Nik-Khah, A. (2008). Impulsive waves caused by subaerial landslides. Environmental Fluid Mechanics, 8, 263-280. https://doi.org/10.1007/s10652-008-9074-7
Ataie-Ashtiani, B., & Yavari-Ramshe, S. (2011). Numerical simulation of wave generated by landslide incidents in dam reservoirs. Landslides, 8, 417-432. https://doi.org/10.1007/s10346-011-0258-8
Basirat, S., Mokhtarzadeh, G., Bazargan, J., & Delavari, E. (2022). Numerical Investigation of Wave Production due to Mass Slip Using Finite Volume Method and Overset Mesh. Water Resources Engineering, 15(54), 43-56. https://doi.org/10.30495/wej.2022.27135.2291 (In Persian).
Karami Moghadam, M., Amini, A., & Keshavarzi, A. (2020). Intake design attributes and submerged vanes effects on sedimentation and shear stress. Water and Environment Journal, 34(3), 374–380. https://doi.org/10.1111/wej.12471
Bagherzadeh, M., & Mohammadi, M. (2025). Impact of Gabion Sill on Scouring Depth Downstream Grade Control Structures. Results in Engineering, 105717. https://doi.org/10.1016/j.rineng.2025.105717 (Article In Press)
Du, J., Yin, K., Glade, T., Woldai, T., Chai, B., Xiao, L., & Wang, Y. (2022). Probabilistic hazard analysis of impulse waves generated by multiple subaerial landslides and its application to Wu Gorge in Three Gorges Reservoir, China. Engineering Geology, 276, 105773. https://doi.org/10.1016/j.enggeo.2020.105773
Dignan, J., Hayward, M. W., Salmanidou, D., Heidarzadeh, M., & Guillas, S. (2023). Probabilistic landslide tsunami estimation in the Makassar Strait, Indonesia, using statistical emulation. Earth and Space Science, 10(8), e2023EA002951. https://doi.org/10.1029/2023EA002951
De Carvalho, R. F., & Antunes do Carmo, J. S. (2007). Landslides into reservoirs and their impacts on banks. Environmental Fluid Mechanics, 7, 481-493. https://doi.org/10.1007/s10652-007-9039-2
Daneshfaraz, R., Bagherzadeh, M., Ghaderi, A., Di Francesco, S., & Asl, M. M. (2021). Experimental investigation of gabion inclined drops as a sustainable solution for hydraulic energy loss. Ain Shams Engineering Journal, 12(4), 3451-3459. https://doi.org/10.1016/j.asej.2021.03.013
Darvenne, A., Viroulet, S., & Lacaze, L. (2024). Physical model of landslide‐generated impulse waves: Experimental investigation of the wave‐granular flow coupling. Journal of Geophysical Research: Oceans, 129(9), e2024JC021145. https://doi.org/10.1029/2024JC021145
Dattatri, J., Raman, H., & Shankar, N. J. (1978). Performance characteristics of submerged breakwaters. In Coastal Engineering 1978 (pp. 2153-2171). https://doi.org/10.1061/9780872621909.132
Evers, F. M., Hager, W. H., & Boes, R. M. (2019). Spatial impulse wave generation and propagation. Journal of Waterway, Port, Coastal, and Ocean Engineering, 145(3), 04019011. https://doi.org/10.1061/(ASCE)WW.1943-5460.0000514
Fritz, H. M., Hager, W. H., & Minor, H. E. (2003). Landslide generated impulse waves. Experiments in Fluids, 35, 505-519. https://doi.org/10.1007/s00348-003-0659-0
Fritz, H. M., Hager, W. H., & Minor, H. E. (2004). Near field characteristics of landslide generated impulse waves. Journal of waterway, port, coastal, and ocean engineering, 130(6), 287-302. https://doi.org/10.1061/(ASCE)0733-950X(2004)130:6(287)
Heller, V., Hager, W. H., & Minor, H. E. (2010). Landslide generated impulse waves in reservoirs: Basics and computation. VAW-Mitteilungen, 211. https://doi.org/10.3929/ethz-b-000157446
Heller, V., Moalemi, M., Kinnear, R. D., & Adams, R. A. (2012). Geometrical effects on landslide-generated tsunamis. Journal of waterway, port, coastal, and ocean engineering, 138(4), 286-298. https://doi.org/10.1061/(ASCE)WW.1943-5460.0000130
Huang, B., Wang, S. C., & Zhao, Y. B. (2017). Impulse waves in reservoirs generated by landslides into shallow water. Coastal Engineering, 123, 52-61. https://doi.org/10.1016/j.coastaleng.2017.03.003
Huang, T., Zhang, H., & Shi, Y. (2022). Numerical simulation of landslide-generated tsunamis in lakes: A case study of the Xiluodu Reservoir. Science China Earth Sciences, 1-15. https://doi.org/10.1007/s11430-022-9989-1
Jonsson, I. G. (1990). Wave-current interactions. The sea, 9, 65-120.
Kafle, J., Dangol, B. R., Tiwari, C. N., & Kattel, P. (2023). Dynamics of landslide-generated tsunamis and their dependence on the particle concentration of initial release mass. European Journal of Mechanics-B/Fluids, 97, 146-161. https://doi.org/10.1016/j.euromechflu.2022.10.003
Kim, G. B., Cheng, W., Sunny, R. C., Horrillo, J. J., McFall, B. C., Mohammed, F., Fritz, H. M., Beget, J., & Kowalik, Z. (2020). Three dimensional landslide generated tsunamis: Numerical and physical model comparisons. Landslides, 17, 1145-1161. https://doi.org/10.1007/s10346-019-01308-2
Kubowicz-Grajewska, A. (2015). Morpholithodynamical changes of the beach and the nearshore zone under the impact of submerged breakwaters–a case study (Orłowo Cliff, the Southern Baltic). Oceanologia, 57(2), 144-158. https://doi.org/10.1016/j.oceano.2015.01.002
Ma, H., Wang, H., Shi, H., Xu, W., Hou, J., Wu, W., & Xie, W. C. (2024). Probabilistic landslide-generated impulse waves estimation in mountain reservoirs, a case study. Bulletin of Engineering Geology and the Environment, 83(12), 494. https://doi.org/10.1007/s10064-024-04003-2
Owtad, R., Basirat, S., Delavari, E., hosseini, M., & Hojaji Najafabadi, M. (2024). Experimental study of waves created by sliding masses in a rectangular water reservoir. Water Resources Engineering, 17(62), 16-28. https://doi.org/10.30495/wej.2024.32271.2395 (In Persian).
Panizzo, A., De Girolamo, P., & Petaccia, A. (2005). Forecasting impulse waves generated by subaerial landslides. Journal of Geophysical Research: Oceans, 110(C12). https://doi.org/10.1029/2004JC002778
Pilvar, M., Pouraghniaei, M. J., & Shakibaeinia, A. (2019). Two-dimensional sub-aerial, submerged, and transitional granular slides. Physics of Fluids, 31(11). https://doi.org/10.1063/1.5121881
Romano, A. (2020). Physical and numerical modeling of landslide-generated tsunamis: A review. Geophysics and Ocean Waves Studies.
Rauter, M., Viroulet, S., Gylfadóttir, S. S., Fellin, W., & Løvholt, F. (2022). Granular porous landslide tsunami modelling–the 2014 Lake Askja flank collapse. Nature communications, 13(1), 678. https://doi.org/10.1063/1.5121881
Rubin, W., Wang, Y., Wan, J., Xu, W., Yang, Y., & Wang, H. (2023). Propagation Mechanism of Deep-Water Impulse Waves Generated by Landslides in V-Shaped River Channels of Mountain Valleys: Physical Model of Regular Rigid Block. Geofluids (Online), 2023. https://doi.org/10.1155/2023/1743305
Yin, K. L., Liu, Y. L., Wang, Y., & Jiang, Z. B. (2012). Physical model experiments of landslide-induced surge in Three Gorges Reservoir. Earth Science/Diqiu Kexue, 37(5), (in Chinese).
Watts, P., Grilli, S. T., Kirby, J. T., Fryer, G. J., & Tappin, D. R. (2003). Landslide tsunami case studies using a Boussinesq model and a fully nonlinear tsunami generation model. Natural hazards and earth system sciences, 3(5), 391-402.
Xingchen, D., Bolin, H., Qiuwang, L., Shulou, C., Yang, L., & Guoqiang, Y. (2024). Prediction of impulse waves generated by partially submerged landslides with a low Froude number based on prototype physical experiments. Physics of Fluids, 36(10). https://doi.org/10.1063/5.0233925
Yin, K. L., Liu, Y. L., Wang, Y., & Jiang, Z. B. (2012). Physical model experiments of landslide-induced surge in Three Gorges Reservoir. Earth Science/Diqiu Kexue, 37(5)  [In Chinese].