MATHEMATICAL MODEL FOR INVESTIGATING WAVE ATTENUATION BY WOODEN FENCES

• Main Author: Diandra Safira, Thalia
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/63673
• Institution: Institut Teknologi Bandung

The shoaling phenomenon occurs when a wave moves towards the beach. When the wave amplitude increases as the sea bottom decreases, this is referred to as shoaling. The wave with a large amplitude can causes erosion. People usually plant a mangrove forest along the coast to prevent erosion. Unfortunately, the mangrove forest is being destroyed and will soon become extinct as a result of a high tide. Therefore, another type of wave breaker is required to protect the mangrove forest. This research will look into the effectiveness of wooden fences in protecting mangrove forests. These wooden fences will be used as porous media along the coast. Following that, a mathematical model will be developed to determine how much attenuation is produced by wooden fences. To obtain the solution of the wave transmission coefficient, this mathematical model will be solved analytically and numerically. The wave transmission coefficient is a ratio of the amplitude of the wave transmission after it has passed through the porous media to the initial amplitude. In addition, the numerical solution will be obtained using the staggeredgrid finite volume method. The numerical solution will then be compared with the analytical solution and experimental data. Each simulation will be performed based on the domain and the initial values of each variable. This mathematical model can be used to simulate wave attenuation by wooden fences after the numerical model has been validated. Finally, this research is expected to be used in the development of mangrove protection areas.