Physical modelling of boulder transport under the influence of tsunami waves

Roberts, S. and Raby, A. and Boulton, S. and Allsop, W. and Antonini, A. and Van Balen, I. and McGovern, D. and Adams, K. and Chandler, I. and Cels, J. and Manzella, I. (2024) Physical modelling of boulder transport under the influence of tsunami waves. In: Coastlab24 (9th International Conference on Physical Modelling in Coastal Engineering), 13 - 16 May 2024, Delft, Netherlands.

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Tsunami events are traditionally represented in the geological record by a sequence of fine-grained sediments, but increasingly coastal boulder deposits are being used as indicators of past tsunami events. The emplacement mechanism of many boulder deposits, however, is heavily debated and determining whether the inundation event was a tsunami or storm remains an unresolved challenge (Cox et al., 2020). Using physical experiments, we aim to achieve a better understanding of how tsunamis move coastal boulders. This knowledge will aid field geomorphologists in the identification of the emplacement mechanism for coastal boulder deposits and allow for the determination of wave parameters. In January 2023, physical experiments using the HR Wallingford Tsunami Simulator were completed as part of the MAKEWAVES collaboration. These experiments investigated the movement of a cuboid and irregular shaped boulder model when impacted by different tsunami waveforms on a plane beach. We propose new empirical formulae to describe relationships between transport distance and different tsunami waves.

Item Type: Conference or Workshop Item (Paper)
Additional Information: Open Access
Uncontrolled Keywords: Tsunami, Physical Model, Boulder Transport
Subjects: Coasts > General
Maritime > General
Divisions: Coastal
Depositing User: Helen Stevenson
Date Deposited: 11 Jun 2024 14:32
Last Modified: 11 Jun 2024 14:36

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