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Article

Investigating the Behavior of an Onshore Wall and Trench Combination Ahead of a Tsunami-Like Wave

Department of Civil Engineering, Osaka University, Osaka 565-0871, Japan
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Author to whom correspondence should be addressed.
Geosciences 2020, 10(8), 310; https://doi.org/10.3390/geosciences10080310
Received: 29 June 2020 / Revised: 7 August 2020 / Accepted: 10 August 2020 / Published: 13 August 2020
(This article belongs to the Special Issue Interdisciplinary Geosciences Perspectives of Tsunami Volume 3)
This study investigates a wall and trench combination to identify its benefits as a defense measure against an overtopping tsunami-like wave. The study focuses on several arrangements and geometries of a wall and trench combined structural system, located on the shoreline. The structural system is assessed via a numerical model, which is initially calibrated by physical experiments of tsunami-like wave transformations. A dam break event is used to model a tsunami-like wave interaction with the structures. Resulted wave properties are investigated to identify the behavior of the structural system from the viewpoint of structure geometry and configuration. The results of the study clearly show that the proposed structure combination can effectively reduce the impact of tsunami-like waves, better than a single sea wall defense system. This is achieved by reducing both wave run-up and wave induced current velocities at the lee side of the structure. View Full-Text
Keywords: tsunami; seawall; onshore; inundation; wall and trench system tsunami; seawall; onshore; inundation; wall and trench system
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MDPI and ACS Style

Silva, A.; Araki, S. Investigating the Behavior of an Onshore Wall and Trench Combination Ahead of a Tsunami-Like Wave. Geosciences 2020, 10, 310. https://doi.org/10.3390/geosciences10080310

AMA Style

Silva A, Araki S. Investigating the Behavior of an Onshore Wall and Trench Combination Ahead of a Tsunami-Like Wave. Geosciences. 2020; 10(8):310. https://doi.org/10.3390/geosciences10080310

Chicago/Turabian Style

Silva, Akalanka, and Susumu Araki. 2020. "Investigating the Behavior of an Onshore Wall and Trench Combination Ahead of a Tsunami-Like Wave" Geosciences 10, no. 8: 310. https://doi.org/10.3390/geosciences10080310

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