Coastal Defences on Low-Lying Reef Flats: A Laboratory Study of Seawall Shape and Position

The present study reports on a series of laboratory experiments aiming to understand and optimize the deployment seawall defences over low-lying coral reef flats. is performed in purely cross-shore configuration, with varying wave forcing, water depth, shapes positions along flat. observations reveal individual combined effects external parameters. A higher efficiency reached for low waves, shallow seaward position, stepped shape. dimensionless formulation proposed predict short transmission coefficient dependency freeboard, incoming height, berm width,