Abstract: Thesis composed of two parts: (i) experiments on nonlinear water wave transmission and reflection at narrow openings such as harbour mouths and inlets, (ii) flow and sediment transport, erosion and deposition at tidal inlets, flushing of connected bay and lagoon systems. Dissertation Discovery Company and the University of Florida are dedicated to making scholarly works more discoverable and accessible throughout the world. This dissertation, "Flow Separation and Related Phenomena at Tidal Inlets" by Emin Ozsoy, was obtained from the University of Florida and is being sold with permission from the author. A free digital copy of this work may also be found in the university's institutional repository, the IR@UF. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation.