2011•Coasts and Ports 2011 : Diverse and Developing: Proceedings of the 20th Australasian Coastal and Ocean Engineering Conference and the 13th Australasian Port and Harbour ConferenceRequires access
Wave transmission past low crested and submerged breakwaters
Markus Muttray, Bas Reedijk
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Abstract
The wave transmission at low crested rubble mound breakwaters due to wave overtopping and wave penetration through the structure is addressed in this paper. Wave transmission past rubble mound breakwaters was investigated experimentally in 2D hydraulic model tests. The transmission at low crested structures is primarily determined by wave overtopping. The incident wave height, the freeboard and the crest width have been identified as governing parameters for the wave transmission. The effect of breakwater slope and wave steepness is insignificant for contemporary rubble mound breakwaters with interlocking armour. The fictitious run-up height (a function of incident wave height) and the equivalent freeboard (combining actual freeboard and crest width) have been applied for predicting the wave transmission by wave overtopping. A new wave transmission formula has been developed, which is applicable for low crested and submerged rubble mound breakwaters with relatively steep slopes (steeper than 1:2) and various crest geometries (crest width 0.5 < B/Hs,i < 5).