2-DIMENSIONAL MODEL FOR WAVE ATTENUATION OVER SUBMERGED POROUS STRUCTURES

• Main Author: Marcela, Indriana
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/72948
• Institution: Institut Teknologi Bandung

Climate change is a major threat to various forms of life and the environment, especially for the coastal areas. Abrasion and erosion phenomena that occur in coastal areas as a result of climate change must be mitigated. A concrete step that can be taken to reduce the risk of disasters in the coastal areas is the utilization of submerged porous breakwaters. This research will study the influence of using breakwaters on the wave’s amplitude reduction through mathematical modeling. The mathematical model used to describe the movement of waves through the porous structure are based on the two-layer shallow water equations. Furthermore, the analytical solution of the model will be derived in the form of the dispersion relation equation and the wave transmission coefficient. Then, the numerical solution will be found by utilizing the finite volume method on a half grid. With this method, the simulation of wave movement through the porous structure will be obtained. The numerical solution that has been obtained will then be validated with its analytical solution. This study will also discuss the impact of the porous media characteristics on the wave attenuation. Finally, the verified numerical scheme will be used to study the wave attenuation in an actual coastal bathymetry. The author believes that this research can be useful for coastal protection systems.