The Office of Public Works (OPW) is delighted to announce the launch of an important web-based applications Portal known as the FSU Web Portal. The Portal is a key output of the Flood Studies Update (FSU) Research Programme that was initiated, managed and funded by the OPW and is a substantial update of the Flood Studies Report (NERC,1975) which provided methodologies for flood estimation in Ireland and the United Kingdom. The rainfall and flood estimations methodologies that derive from the FSU Research Programme are now implemented in the FSU Web Portal which may be accessed at the following web address:http://www.opw.ie/en/fsu/