Abstract
The gentle slope seawalls which has 1:3 front grade with wave dissipating blocks is supposed to be constructed at the northwest part of the Ise bay. The experimental study has been carried out to clarify the characteristics of wave overtopping of the seawalls. The experiment clarified the total rates and its horizontal distribution of wave over topping, comparing to the normaltype of wave dissipating seawalls which has 1:4/3 front grade. In addition, the figures assumed the amount of wave overtopping at any height of seawalls are developed. It will be very useful to design the height of seawalls.
