IMPROVING EXISTING DESIGN GUIDANCE OF OFFSHORE BREAKWATER FOR PREDICTING SHORELINE RESPONSE TO SUBMERGED BREAKWATER

Emergent coastal structures, such as groynes, detached offshore breakwaters and sea
walls have been successfully adopted as coastal protection measures for many decades_
However, environmentally aware modem communities are beginning to prefer
engineering structures that are less intrusive and more aesthetically appealing_ As a
result, submerged breakwaters (SBWs), which do not impair beach amenity or
aesthetics, are becoming a preferred option for coastal protection_ But, SBWs have
rarely been adopted for coastal protection in the past and therefore, their efficacy
remains largely unknown_ Also, enhanced shoreline erosion has been reported in the
lee of the structure of several SBW projects_ The non-performance of these SBW
facilities have been attributed to the lack of performance data of SBW and the use of
existing design guidance of offshore breakwater to predict shoreline response at the lee
of such structure_ Henceforth, this study endeavored to improve these existing design
guidance for predicting shoreline response at the lee of SBW.