Abstract
Submerged breakwaters are important coastal structures that protect seashore from waves. The transmission coefficient increases at high tide in large tidal zones.
So, when the water depth is large over the submerged breakwater, effective armor blocks are developed. Eddies form between the ripple-type armor blocks during the onshore and offshore semiorbital wave motions. Incident waves reduce these eddies over the armor blocks, and transmission coefficient becomes small.
