Morphodynamic in the Opening of Artificial Reefs

Abstract

This study focuses on the morphodynamics in the opening of artificial reefs. The morphodynamics around the artificial reefs in the Uradome Beach, Tottori, were analyzed from survey results. The scour in the opening of the reefs were remarkably occurred due to extension of the crown-height and width of the reefs. In order to clarify the mechanism of the scour, the hydrodynamic characteristics in the opening of the reefs were examined by the laboratory experiments, and the morphodynamics around the reefs in the Uradome Beach were investigated using three-dimensional beach evolution model. From the results of experiments and numerical simulations, it was found that a cause of the scour of the opening was due to strong rip-currents generated by the extension of the crown-height.