Shoreline Combined Wave Climate and Water Level Conditions (ICWWS 2018 – Phase 2)

Abstract: This dataset shows the shoreline combined wave climate and water level conditions for the Coastal Areas Potentially Vulnerable to Wave Overtopping (CAPOs) that were included in Phase 2 of the Irish Coastal Wave and Water Level Modelling Study (ICWWS 2018). Joint probability water level and wave climate condition tables have been produced for each Phase 2 CAPO for the present day scenario, Mid-Range Future Scenario (MRFS), High End Future Scenario (HEFS), High+ End Future Scenario (H+EFS) and High++ End Future Scenario (H++EFS) which represent a 0.5m, 1.0m, 1.5m and 2.0m increase in sea level respectively. For each AEP from 50% to 0.1%, six combinations of wave climate and water level conditions were produced, representing the complete joint probability range. The outputs of this study are considered suitable to inform the assessment of flood risk at a community level. The outputs of this study are NOT considered suitable to inform to inform the assessment of flood risk to individual sites or properties, the detailed assessment of flood risk to existing coastal infrastructure, the detailed evaluation of the risk associated with wave overtopping, any resulting coastal flooding (both now and in the future) or for the detailed design of measures to mitigate and manage any such identified coastal flood risk.

Purpose: Phase 2 of the Irish Coastal Wave and Water Level Modelling Study (ICWWS) 2018 provides an update to the previous ICWWS 2013 study wave climate and water level combinations of known Annual Exceedance Probability (AEP) based on the inclusion of additional data. The outputs of Phase 2 provide sufficient information for strategic assessment of the flood risk (both now and in the future) at locations considered vulnerable to wave overtopping.