抄録
We have been proposed the delta-type reef as the coastal structure to generate good waves for surf-riding. It is effective for a promotion of oblique wave breaking and an amplification of waves. Waves can be concentrated and amplified by setting up the crescent-type submerged mound in the front of the delta-type reef. In this research, the transformations of waves around these structures were calculated by the MSE numerical simulation. The properties of these structures were examined from the calculated results.
