Numerical Simulation Of The Breakwater Influence On The Wave-induced Currents And The Sediment Transport In Coastal Zone

The waves and wave-induced currents due to the wave breaking are the important hydrodynamics in coastal zone. The effect of the waves blowing sand is more noticeable, and the wave-induced currents have played an important role in sediment transport along the coast. The breakwater has very important influence on the protection of coastal projects, seabed erosion and deposition. Therefore, the research on the effect of the breakwater for the waves, wave-induced currents and the sediment transport will be of great importance in studying the shoreline erosion and deposition accurately, and that has very important significance in solving the corresponding actual engineering problems further more.This paper based on the waves model, the wave-induced currents model and the sediment transport model, which simulated the waves, the wave-induced currents and the influence of the breakwater on the wave-induced currents and the sediment transport in coastal zone. The numerical based the parabolic mild-slope equation considering the effect of refraction and diffraction, the two-dimensional shallow water equations considering the effect of the waves, which makes the waves and wave-induced currents numerical model. The numerical model is applied to the Obakoy coastal water which is located at the Mediterranean coast of Turkey. The distribution of the wave propagation and wave-induced currents due to the wave breaking in this coastal area are studied, which designs and analyzes the validity and applicability of the model for the practical coastal area. And then the model is used to study the waves and wave-induced currents by the waves propagate from different directions.Then combined with the two-dimensional suspended sediment transport equations, the bed-load equations and the coast evolution model, which makes the sediment transport and coast evolution numerical model in waves and currents. The Large-scale Sediment Transport Facility(LSTF) at the US Army Corps of Engineer Research and Development Center in Vicksburg is used to validate the validity and applicability of the numerical model. Then the influence of the different wave incidences and layouts of the breakwater on the wave-induced currents and the sediment transport are analyzed by using the established numerical model.The study results prove that the numerical of this paper can effectively simulated the waves and wave-induced currents, the sediment transport and coast evolution in coastal zone. The layouts of the breakwater reasonably can effectively protect the coast evolution of the waves and wave-induced currents in coastal zone.