ICCE 2022

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TURBULENT BORES–INDUCED SCOUR AND PORE PRESSURE VARIATIONS AROUND A VERTICAL STRUCTURE. (2023). Coastal Engineering Proceedings, 37, sediment.41. https://doi.org/10.9753/icce.v37.sediment.41


The scour due to the highly turbulent tsunami inundation is also a major threat to nearshore infrastructure [Nakamura, et al., 2008]. Research on local sediment erosion during tsunami events has shown a correlation between scour formation, pore pressure variations, and soil liquefaction [Mioduszewski and Maeno, 2003]. To understand the structures’ capacity to withstand the tsunami bores, it is critical to assess scour formation and pore pressure variations around their foundations [Macabuag et al., 2018, Nicholas et al., 2020; Mehrzad et at. 2021]. Young et al. (2008) conducted laboratory experiments to study tsunami induced liquefaction failure on a sand bed with two different slopes of 1V:5H and 1V:15H. The correlation between soil liquefaction and scour showed a direct link with bed slope and pore pressure and the peak pressure increased as the bed slope increased. Concerning the hydrodynamic forcing factor, research conducted by [Chanson, 2006] showed that the hydrodynamic characteristics of tsunami inundation can be adequately modeled using dam-break waves. The prime objective of this study was to comprehensively investigate the interaction of a wide range of hydrodynamic conditions and beach slopes on the variation of the pore pressure and associated scour.


Chock, G., Roberson I., Kriebel D., Francis M., Nistor, I. (2013). Tohoku Japan tsunami of March 11, 2011 – Performance of structures under tsunami loads, ASCE/SEI Report, 359 p

Mehrzad, R., Nistor, I. and Rennie, C., (2022). Scour Mechanics of a Tsunami-Like Bore around a Square Structure. J. of Waterway, Port, Coastal, and Ocean Eng., 148(1), p.04021048.

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Copyright (c) 2023 Marieh Rajaie, Ioan Nistor, Colin D. Rennie, Amir H. Azimi, Tom Hoffmann