Watch as land managers explain how 'leaky dams' could reduce flooding of the River Severn
A project that aims to provide nature-based solutions to reduce flooding on the River Severn is underway.
The Severn Valley Water Management Scheme ‘demonstrator project’ is managed by Shropshire Council through the River Severn Partnership and has its focus on the Rea Brook, which flows into the River Severn in Shrewsbury.
The £900,000 project is being delivered by Severn Rivers Trust.
It aims to provide a suite of nature-based flood management schemes that will demonstrate different measures that can both hold back water and also enhance habitat and biodiversity.
These include:
More than 150 leaky dams which hold back water but also enhance habitat for fish by holding gravels, and increasing the diversity and abundance of macroinvertebrates in the watercourse.
Five hectares of new native cross slope woodland which can significantly reduce surface runoff by increasing soil infiltration, and water uptake. They also provide valuable habitat to a wide range of birds and insects.
35 hectares of multi beneficial wetlands. These can be ponds, scrapes and swales, and can be ephemeral or year-round water holding but with the capacity to hold additional water during rainfall events.
Four hectares of floodplain reconnection works. This will aim to increase the value of the floodplain by enhancing connectivity with the rivers, and may include re-meandering, flood channel creation, channel diversion. This would help dissipate flood water over a larger area, and thereby reduce peak flood flows.
Farmer Rhian Pinches has seen scrapes and leaky dams installed on her land in the Hollies Special Area of Conservation.
She said: “We are happy to be part of this project and to see what a difference the scrapes and leaky dams will make to not just our land, but also downstream and in terms of slowing the flow and reducing the flood impact for communities.”
Mark Barrow, co-chair of the River Severn Partnership, said: “By developing and delivering a range of collaborative projects, such as the Rea Brook demonstrator project, we will improve the natural environment for future generations and secure economic and community resilience in the face of climate uncertainty.
“These projects are aligned to River Severn Partnership and Environment Agency strategic priorities of developing an integrated nature-based funding strategy to monetise nature-based outcomes such as carbon sequestration, biodiversity gain, soil and water quality enhancement within the catchment.
“The learnings will also help inform our planning of the Severn Valley Water Management Scheme as we actively seek opportunities to incorporate sustainable water resource management, deliver environmental improvements, promote health and well-being and minimise year on year the economic loss to the community caused by flooding.”
