The researchers’ simulations showed that wetlands that grow in estuaries, such as salt marshes, can reduce water levels by up to 2 metres and provide protection far inland up estuary channels.
The researchers’ simulations showed that wetlands that grow in estuaries, such as salt marshes, can reduce water levels by up to 2 metres and provide protection far inland up estuary channels.
This subsequently saved up to $38 (£27) million in avoided flood damage costs per estuary during a large storm thanks to the wetlands’ role in preventing storm floods.
The research is timely as wetlands are facing growing threats from continued urban development. 22 of the largest 32 cities in the world – including London, New York and Tokyo - are built on low-lying land around estuaries, which puts them at increasing risk of flooding in a warming climate. At the same time climate change is driving increases in the magnitude and frequency of storms, and sea level rise.
The flood prevention role of coastal wetlands, which are common throughout Wales – the focus of this study - as well as the rest of the world, is therefore vital.
Read more at: Swansea University
