Rubble Mound Jetty Armor Damage

In this paper, a small-scale experiment measuring damage development on rubble mound jetties is discussed. The jetties were arranged in a parallel configuration to form an inlet and were exposed to four long-term storm series composed of waves only and waves on a steady ebb current. In this paper, only tests with waves head-on to the jetties are discussed. The experiment yielded unique topographic data of one structure acquired throughout each storm using a precision laser profiler. The data show that previously developed equations for predicting damage development on breakwaters can predict damage on jetties; but the empirical calibration coefficients are shown to be variable between test series. Damage development for jetties with wave crests perpendicular to structure alignment appears to be similar to that of breakwater cross sections where wave crests are parallel to structure alignment.