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

Geosciences

Susumu Araki¹  Akalanka Silva¹ 

[1]Department of Civil Engineering, Osaka University, Osaka 565-0871, Japan

关键词: tsunami;    seawall;    onshore;    inundation;    wall and trench system;   

DOI  :  10.3390/geosciences10080310

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown