Investigating the effect of wave parameters on wave runup

The research presents the results and findings of an experimental work to investigate the influence of wave condition on the wave runup and rundown of rough armoured rubble mound breakwater. This work has been supported by the Hydraulics Research Institute (HRI). An experimental program was designed including more than 70 tests. A physical model with a scale of 1:20 was constructed in the coastal laboratory of HRI. Measuring devices were arranged, and measurements were undertaken and analyzed from which the impact of wave height, wave period so as the steepness on the resulting wave run-up so as the rundown, on rough armoured rubble mound breakwater, was recognized. The experiments were executed in the domain of dimensionless wave steepness that ranged between 0.01 and 0.07 while the measured dimensionless run-up varied between 1.26 and 2.24. The results were used to validate selected existing equations. Based on the results, it was clear that the wave steepness has a great effect on the run-up.