NEARSHORE BEHAVIOR OF BORE ON A UNIFORMLY SLOPING BEACH

Abstract

Using the laser-induced fluorescent method, the detailed transition process from bore to run-up mode is clarified experimentally. The transition process is found to be different from the previous predictions, and might provide an explanation for the discrepancies of the run-up height between the theory and laboratory measurements. Turbulence generated in a bore appears to be highly three-dimensional and sporadic. Turbulence generated close to the shore is advected with the bore-front motion and violent turbulent actions result during the transition from bore to run-up mode.