Strategic Flood Risk Assessment Report

Strategic Flood Risk Assessment for the Draft Cork City Development Plan 2022-2028

Information Source

Description

Strategic Limitations

Pluvial flood maps, 2012 3

been to identify areas prone to flooding, and the risks associated with such flooding, but this analysis is purely indicative and undertaken for the purpose of completing the PFRA. The mapping has been developed using simple and cost-effective methods and is based on broad- scale simple analysis and may not be accurate for a specific location/use. undertaken

• Extensive consultation with each local authorities and other Government departments and agencies. This assessment has considered all types of flooding, including that which can occur from rivers, the sea and estuaries, heavy rain, groundwater, the failure of infrastructure, and so on. It has also considered the impacts flooding can have on people, property, businesses, the environment and cultural assets. Further information on the purpose and development of the OPW PFRA Maps are available on www.cfram.ie. National Coastal Protection Strategy Study flood and coastal erosion risk maps: the predicted flood extents that were produced under the Irish Coastal Protection Strategy Study (ICPSS) are based on analysis and modelling. The project included:  Analysis of historic recorded sea levels  Numerical modelling and statistical analysis of combined tide levels and storm surges to estimate extreme water levels along the national coastline  for defined probabilities  Calculation of the extent of the predictive flooding, by comparing calculated extreme tide and surge waters levels along the coast with ground level based on a Digital Terrain Model (DTM). These indicative national coastal flood maps are included in the Draft PFRA Maps, provided in a separate volume, for the purposes of consultation on the PFRA. The OPW NIFM project has produced second generation indicative fluvial flood spatial data that are of a higher quality and accuracy to those produced for the first cycle PFRA. This project has covered 27,000 km of river reaches, separated into 37 drainage areas, consisting of 509 sub-catchments.

National Indicative Fluvial Mapping (NIFM) 2021

Does not cover smaller sized catchments

2.5 Conclusion of Stage 1 SFRA The information detailed above indicates elevated levels of flood risk in various locations across the City; therefore, a Stage 2 SFRA has been proceeded to.

3 Appendix II of this assessment includes PFRA Fluvial and Coastal mapping. Pluvial and groundwater flood risk is present in the City, however; it is not taken into account in the delineation of flood zones. Nonetheless, it has informed the development of recommendations detailed in Section 4.

CAAS for Cork City Council