Effect of Breakwater on Wave Energy Dissipation
EFFECT OF BREAKWATERS ON WAVE ENERGY DISSIPATION
ABSTRACT
The northern Egyptian coasts are subjected to many changes in shoreline balance due to waves and coastal currents. To protect and develop these coasts, many types of coastal protection structures have been used. This research demonstrates the effect of different systems of coastal protection structures on wave energy dissipation. By using the CGWAVE numerical model, the effect of each one and interaction between these structures on wave height could be studied. This model was used to simulate the wave propagation along Ras EL- Bar beach with different coastal structures such as groins, detached breakwaters, seawalls, shore-connected breakwaters and submerged breakwaters. By applying the numerical wave modeling on natural bed bathymetric at this area, the results show that, the effects of every system alone and interaction between these systems on wave energy by applying numerical wave modeling to the natural bed bathymetric of this area, the results show the effects of each system alone and the interaction between these systems in terms of dissipation of wave energy.
The results of this model could be used as a guide in designing similar works in the future.
Keywords: Waves, Breakwater, Groins, Energy Dissipation, Coastal, Ras EL-Bar.
1. INTRODUCTION
Waves and currents attack the coastal beaches along the northern coast of Egypt. The erosion takes place in several regions and accretion occurs in some other places along the coastal areas. Many areas subjected to aggressive wave current interaction condition after construction of the High Aswan Dam along the Nile River. Damietta branch estuary is focused on this study. The sea side resort of Ras ELBar has been built by the sediment carried by the Damietta branch, but it was subjected to erosion after construction of the High Aswan Dam.
In many previous research works, the effect of coastal protection systems has been investigated
ABSTRACT
The northern Egyptian coasts are subjected to many changes in shoreline balance due to waves and coastal currents. To protect and develop these coasts, many types of coastal protection structures have been used. This research demonstrates the effect of different systems of coastal protection structures on wave energy dissipation. By using the CGWAVE numerical model, the effect of each one and interaction between these structures on wave height could be studied. This model was used to simulate the wave propagation along Ras EL- Bar beach with different coastal structures such as groins, detached breakwaters, seawalls, shore-connected breakwaters and submerged breakwaters. By applying the numerical wave modeling on natural bed bathymetric at this area, the results show that, the effects of every system alone and interaction between these systems on wave energy by applying numerical wave modeling to the natural bed bathymetric of this area, the results show the effects of each system alone and the interaction between these systems in terms of dissipation of wave energy.
The results of this model could be used as a guide in designing similar works in the future.
Keywords: Waves, Breakwater, Groins, Energy Dissipation, Coastal, Ras EL-Bar.
1. INTRODUCTION
Waves and currents attack the coastal beaches along the northern coast of Egypt. The erosion takes place in several regions and accretion occurs in some other places along the coastal areas. Many areas subjected to aggressive wave current interaction condition after construction of the High Aswan Dam along the Nile River. Damietta branch estuary is focused on this study. The sea side resort of Ras ELBar has been built by the sediment carried by the Damietta branch, but it was subjected to erosion after construction of the High Aswan Dam.
In many previous research works, the effect of coastal protection systems has been investigated
References: [1]. Arab Contractor Co. (2002). “Dredging Works”. Damietta Port Authority, Egypt. [2]. Bellotti, G. and Brocchini, M. (2002). “On Boussinesq-Type Equations Near The Shoreline: A Note of Caution” [3]. Bender, C.J. and Dean, R.G. (2003). “Wave Field Modification by Bathymetric Anomalies and Resulting Shoreline Changes: A Review with Recent Results” [4]. Berkhoff, J.C.W. (1972). “Computation of Combined Refraction-Diffraction”. 13th Coastal Engineering Conf., Vol [5]. Berkhoff, J.C.W., Booy, N., and Radder, A.C. (1982). “Verification of Numerical Wave Propagation Models for Simple Harmonic Linear Water Waves”