Abstract
Local scouring at the toe of submerged breakwater is investigated in two-dimensional experiments. Wave height distribution and water particle velocity around the submerged breakwater are also measured in the experiments. Erosion at the toe of the submerged breakwater and accretion in the breakwater body are observed in many cases. Large erosion takes place at nodes. of partial standing wave in front of the submerged breakwater. In a few cases, the height of the crest of the submerged breakwater is reduced because of large local scouring. Offshore directed mean velocity has an influence on the topography change around the submerged breakwater under regular waves. On the other hand, the topography change around the submerged breakwater under irregular waves is similar to that in front of an vertical perforated breakwater which has the same reflection coefficient as the submerged breakwater.
