Abstract
Two types of concrete block for gentle slope seawalls are newly developed and their hydraulic characteristics are revealed by experiments in a wave flume. These blocks, settled on a gentle slope, form inner layer for return flow. ' This layer contributes to reduce disturbance on the slope and increase the stability of blocks. Reflection coefficients of slopes covered with these blocks can be decreased to be 0.1-0.3. The relationship between wave run-up and wave steepness is shown using relative depth as a parameter.
