ARTIFICIAL SURF REEFS IN IRELAND: A SUSTAINABLE SOLUTION FOR COASTAL PROTECTION?

摘要

Development in coastal regions in Ireland is expanding. As such there is a corresponding demand for recreational facilities in these areas. Concurrently there is a need to protect existing beaches as they act as recreational hubs for local communities. In line with this and more favourable attitudes towards 'soft engineering' approaches and sustainability, Artificial Surf Reefs (ASRs) have been examined as a possible solution to beach erosion. The potential for the application of such mitigation schemes in Ireland is discussed herein. The ability of ASRs to function for the benefit of both recreation and shoreline protection has been assessed and a case study for Garrettstown Strand, a beach on the southern coast of Ireland, has been considered. The case study encompassed an assessment of long term wave climate, a bathymetry survey and detailed numerical modelling using DHI'_s MIKE21 software. Furthermore the ecological and economic benefits / drawbacks of such a structure have been examined. Overall, these results indicated that an ASR can be a viable option for use in Ireland.