抄録
Physical model tests and numerical simulations are carried out to obtain characteristics of reflection of long period waves. The results of the physical and numerical tests demonstrate that waveabsorbing materials with enough width can be reduced reflection coefficient for the long period waves in a narrow channel. Especially, the wave-absorbing material has a good effect on reduction of large waves. In harbors where small long period waves are observed, a beach and tidal flat may be applied as practical countermeasures against the long period waves.
