Wave Dampening Due to Rubblemound Breakwaters

by Michael de St.Q. Isaacson, (M.ASCE), Asst. Prof.; Dept. of Civ. Engrg., Univ. of British Columbia, Vancouver, B.C., Canada,

Serial Information: Journal of the Waterway, Port, Coastal and Ocean Division, 1978, Vol. 104, Issue 4, Pg. 391-405

Document Type: Journal Paper


Laboratory experiments have been performed to investigate the attenuation of waves propagating along a straight channel bounded by a pair of parallel rubblemound breakwaters. As a reasonable approximation, the spatial gradient of wave height is found to vary with the square of the height. Experimental data of the corresponding attenuation coefficient as a function of relative depth are presented for breakwater slopes of 1/1.5, 1/2, and 1/3. A simplified analysis is presented, and on the basis of this, the experimental results are reduced in order to provide a simple design procedure for the situation under consideration.

Subject Headings: Damping | Breakwaters | Wave attenuation | Wave propagation | Approximation methods | Wave height | Slopes | Hydraulic design

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