The damping action of submerged breakwaters

Abstract

The results of an experimental investigation on the damping action of submerged rectangular breakwaters are presented. The experimental data also are compared with published theories. A new theory is presented which compares more favorably with the experiments than the previous theories. Also given is a summary of all available published theoretical and experimental information on the damping action of trapezoidal and triangular breakwaters, reefs of various configurations, and plane barriers of various orientations.

Shoreline response to submerged structures: A review

“…The great majority of laboratory experiments concerned with submerged breakwaters have focussed on wave transmission across the crest (e.g. Johnson et al, 1951;Tanaka, 1976;Ahrens, 1987;van der Meer, 1991;Hall, 1997, 1998). A comprehensive review of this category of laboratory work is presented in Wamsley et al (2002), and hence is not reproduced here.…”

Generalized evolution equations for nonlinear surface gravity waves over two-dimensional topography

“…Elgar & Guza 1985) and cause the formation of multi-crest wave trains behind submerged obstacles (e.g. Johnson, Fuchs & Morison 1951;Byrne 1969). Difference interactions induce radiation of long-wave motion in the nearshore region, generally referred to by the collective name 'surf beat', coined by its pioneering observer Munk (1949).…”

Simulation of nonlinear free surface dispersive shallow water waves

“…In the deep water region, the nonlinearity play a major role when the extreme wave interacts with the offshore structures, where as in the near shore, due to the change in bathymetry, the nonlinearity play a major role in the coastal region and also in the design of coastal structures. The wave decomposition over a submerged reef or bar has been a topic of great interest over the past few decades ever since, the field investigation by Johnson et al (1951). The waves in shallow water region are found to be Cnoidal in nature and from an experimental investigation 2 to 8 Cnoidal waves in six of the measured wave train were observed by Osborne (1994).…”