2006 年 22 巻 p. 775-780
Local scour around coastal structures may lead instability of them. This study investigates experimentally the local scour in front of an impermeable submerged breakwater with vertical front face. Experimental results show that the scour pattern in front of the submerged breakwater is similar to that in front of a vertical breakwater, although there is a little difference in locations of the scour and deposition. Also, the maximum scour depth normalized by the incident wave height is found to decrease exponentially with relative water depth to the wavelength. The scour depth depends much on the reflection coefficient. This study proposes the estimation method of the scour depth considering the effect of wave reflection and it is demonstrated that the proposed method gives good estimations of the scour depth for various reflection coefficient.