SEA WALL and BEACH PROFILE INTERACTION IN RUN-UP REGION

Abstract

Seawalls are the most common form of coastal defence, they are the physical barriers between land and sea. They are parallel to the beach used to prevent overtopping and flooding due to storm waves. They can be constructed in the front or back of the shoreline. However, the front face of a seawall is subjected to high energy wave action, which can induce the problem of toe scour. Scours in front of the breakwaters and the seawalls have been investigated heavily in the past, but it still remains a concern for coastal engineers. In those previous studies, the sea bottom was considered as flat or having a very mild slope. These may not be valid for steep slope beach in front of a structure. The seawall stands in runup region in this study. The seawall and the beach profile interaction was investigated by experimentally. The beach slopes were 1/5 and 1/10 in the experiments.

Numerical Simulation of Seawall- Beach Profile Interaction in Runup Zone

“…The experiments were carried out in the Coastal and Harbor Engineering Laboratory in Yildiz Technical University by Yüksel et al (2014). The two dimensional wave flume with a length of 26m, width of 1m, and a depth of 1m was used ( Figure 1).…”

“…Authors conducted an experimental study to determine beach profile response due to the presence of a vertical seawall placed in various cross-shore positions, and they examined the differences between natural beaches and seawall-backed beaches in response to normally incident wave attack. Yüksel et. al.…”

“…Authors concluded that the process depends on wave steepness, run-up height, and location of the wall. This study followed by another experimental study (Yüksel et. al., 2014) where the erosion and deposition processes in front of the vertical wall over a steeper slope were investigated.…”

“…In this study CSHORE was used to simulate the impact of the vertical seawall on the beach profiles. Experimental data collected by Yüksel et. al., 2014 were used to validate the numerical model.…”

“…al., 2014 were used to validate the numerical model. In the following, the experimental study by Yüksel et. al.…”