Numerical Modeling of Hydrodynamic Behavior in Coastal Flood Mitigation Structures

Abstract

The increasing frequency of extreme weather events and rising sea levels have intensified the need for effective coastal flood mitigation systems capable of protecting vulnerable coastal infrastructure and populations. This study presents a numerical modeling approach for analyzing the hydrodynamic behavior of coastal flood mitigation structures under varying environmental and hydraulic conditions. The proposed research framework integrates computational fluid dynamics (CFD), hydrodynamic simulations, and numerical analysis techniques to evaluate wave interaction, flow velocity distribution, pressure variation, turbulence effects, and energy dissipation characteristics in coastal protection structures. A computational methodology was employed to simulate the performance of seawalls, breakwaters, levees, and barrier systems under different storm surge scenarios, wave heights, and tidal conditions. The numerical models incorporated fluid-structure interaction principles and nonlinear hydrodynamic parameters to achieve accurate prediction of coastal flooding behavior and structural response. Simulation results demonstrated that optimized coastal mitigation structures significantly reduced wave impact forces, flood inundation levels, and shoreline erosion compared with conventional designs. The analysis also revealed improvements in energy dissipation efficiency, hydraulic stability, and structural resilience under severe coastal loading conditions. Furthermore, parametric studies identified critical design factors influencing hydrodynamic performance, including structural geometry, material properties, and flow boundary conditions. The findings conclude that advanced numerical modeling techniques provide an effective and reliable approach for designing sustainable coastal flood mitigation infrastructure capable of enhancing flood protection and climate resilience. The proposed methodology contributes to the development of intelligent coastal engineering solutions for disaster risk reduction, environmental protection, and long-term coastal infrastructure sustainability in rapidly changing marine environments.