THE EFFECTIVENESS OF TRAPEZOIDAL BREAKWATERAND TRENCH AS WAVE DAMPERS
Beaches require protection from high waves to prevent abrasion and erosion. This study evaluates the effectiveness of coastal defense structures in reducing incoming wave amplitudes using trapezoidal-shaped trench and submerged breakwater models. These shapes can be seen as extensions of the rect...
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| Format: | Theses |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/81517 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Beaches require protection from high waves to prevent abrasion and erosion.
This study evaluates the effectiveness of coastal defense structures in reducing
incoming wave amplitudes using trapezoidal-shaped trench and submerged breakwater
models. These shapes can be seen as extensions of the rectangular models
that have been extensively studied previously. Using numerical and analytical
approaches, we developed a 1D shallow water equation that accounts for friction
factors to calculate the transmission coefficient (Kt) as an indicator of wave attenuation.
Analytical solutions were obtained through the method of separation
of variables, while the finite volume method on a staggered grid was used
for numerical simulations. In this study, a comparison between analytical and
numerical solutions is conducted, particularly focusing on the relationship between
Kt and the depth ratio as well as the friction coefficient. This study also examines
the effectiveness of adding foot domains to the trapezoidal model in reducing wave
amplitudes. It is expected that this geometric modification can enhance coastal
protection more effectively. |
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