Understanding and predicting the impact of submerged coastal structures on nearshore processes

Submerged coastal structures (e.g., submerged breakwater and reefs) modify incident wave fields and hydrodynamic processes adjacent to shorelines. In this thesis, 3D phase-resolved numerical modelling is used to understand the dynamics of submerged structures interaction with waves, with a focus on their effect on mean currents and wave runup. Submerged structures are shown to result in distinct flow patterns, based on structure geometry and wave conditions, that can subsequently result in shoreline erosion or accretion. The results of this thesis can inform submerged structure design and provide predictive capability for circulation dynamics in the lee of natural reefs.