MACROFEATURES AND ENGINEERING PROPERTIES OF WAVE BREAKING AT SUBMERGED RUBBLE-MOUND BREAKWATERS

摘要

Experimental tests on interaction between a wave and a submerged rubble-mound breakwater were performed in wave flume at University of Napoli Federico II. Different incident wave conditions were tested, including both non-breaking and breaking waves over the barrier. In cases of breaking, different breaker types at structure were described and classified according to hydraulic-morphological criteria. Experimental data shows that breaker index can be described by a Goda-type equation. Results, consistently with early literature, show that wave breaking significantly affects wave-barrier interaction not only in terms of energy dissipation, but also in terms of energy distribution in frequency domain. Empirical formulae were derived to estimate 1~(st) and 2~(nd) order wave amplitudes in the sheltered area in case of wave breaking over the barrier.