" half-arsed arguments, largely 20 years out of day, on a subject you have no knowledge off whatever"

Actually if you bothered to follow the links I supplied you would find that the OPW, following EU directives, has recently published a report(2018)Flood Risk Management Plan for the Shannon Estuary North & Mal Bay River Basin (UOM27-28) Not 20 years old at all.

Furthermore:
"he primary objective of Government policy on coastal protection is to ensure that in areas identified as being at greatest risk of damage or loss of economic assets through coastal erosion or flooding, appropriate and sustainable measures are identified by Local Authorities to protect those assets. Where such measures are economically justified on cost benefit grounds and compatible with all required environmental and other statutory requirements, they are implemented subject to the availability of resources.

The Office of Public Works (OPW) has undertaken a national assessment of coastal erosion (including erosion rates) under the Irish Coastal Protection Strategy Study (ICPSS) and the results of this study have been published on the OPW website. The relevant reports and associated predictive erosion hazard mapping (to 2050) may be viewed at www.opw.ie.

If you claim I know nothing it is strange that I obtained my chartered geologist status while working on shoreline stability studies in Kent. Others presumably thought otherwise doncha think?