Coastal wetlands' vital flood protection revealed (IMAGE) Swansea University Caption Swansea researchers conducting saltmarsh vegetation surveys and recording water levels on the Taf estuary, South Wales. Their study of estuaries shows the flood protection role of coastal wetlands has been under-estimated. Credit Swansea University Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.