Abstract
To investigate the rate of loss by abrasion of seawalls and damages of wave-dissipating blocks is important and indispensable in maintaining and managing coastal structures. However, there are few investigations of abrasion on a wave-absorbing seawall under the water surface. We have investigated in detail the abrasion of a seawall and damage of wave-dissipating blocks on the Oyashirazu coast in Niigata Prefecture to clarify the mechanism of abrasion on seawalls. The countermeasure against abrasion and its effectiveness are also explained. The improvement work could be beneficial for engineers responsible for maintaining and managing coastal structures.
