Stone Movement on a Reshaped Profile

Abstract

Physical model tests were carried out aiming to provide information on armor stone movements in a berm breakwaters. The following items were examined: displacement threshold, frequency and length of stone displacements. Data were obtained from the observation of cumulative displacements at the end of each wave attack and from video records during the attacks; basic statistical analysis was performed. Threshold conditions, moving frequency and cumulative displacements are expressed as function of a modified mobility number, as stone mobility increases with both wave height and wave period.