Arklow Flood Defence Scheme

Solution 

ByrneLooby carried out the “Avoca River (Arklow) Flood Relief Feasibility Study”. This involved establishing design return period fluvial flows and tidal levels in the Avoca River at Arklow. The design flows were obtained using gauged and ungauged flood estimation techniques. The design tide conditions were obtained from the Irish Coastal Protection Strategy Study (ICPSS) Phase II Study (DCMNR, 2006) that was funded by the Department of the Communications, Marine and Natural Resources. Hydraulic modelling was carried out using the HEC-RAS and  TeleMac2D Hydraulic Models to predict the flood profile in the study reach under a range of tidal and fluvial flood conditions for existing and proposed flood relief scenarios. The Hydraulic Modelling allowed the computation of the longitudinal Flood Profile in the reach, which provided the flood levels for preparing flood inundation maps for the various return period flood events. Flood Extent, Depth and Hazard maps were produced for the fluvial and coastal flood risk.


The scheme will protect hundreds of homes and businesses in Arklow. We coordinated with other consultants during planned phases, working simultaneously in common locations to achieve economies of scale and project savings.

The Planning Stage design is now completed, and the project was submitted to ABP for planning permission in May 2021.