I would point out that the investigation of coastal erosion, in the first instance, is a matter for the relevant local authority concerned.
My Office is not aware of studies or surveys in the County Cork area specifically identifying the threat to farmland from coastal erosion. The South Coast Report of the Irish Coastal Protection Strategy Study (ICPSS), published by OPW in 2011, provides some erosion hazard mapping. These maps are strategic level predictive erosion hazard maps for the years 2030 and 2050 and do not distinguish between farmland or other types of land that may potentially be at risk from erosion. The ICPSS report and maps are available on the OPW website www.opw.ie under Flood Risk Management/Publications.
Cork County Council may have carried out or commissioned other studies or surveys and the Council can be contacted directly on this.