What Do We Hope To Achieve?
We believe that the risk of flooding to properties in and around Dinas Powys can be reduced by implementing Natural Flood Management measures upstream and removing blockages and enhancing storage capacity downstream on The Moors between Dinas Powys and Barry.
Natural Flood Management
In our research we have found many possible natural solutions upstream such as leaky dams near Michaelston Le Pit, local upstream tree planting, existing meadows and wet land in the Cadoxton watershed.
There are many examples of natural flood management schemes throughout England, and it’s been shown that they can offer significant benefits by helping to manage flood risk, sometimes in conjunction with more traditional measures such as building traditional hard defences eg flood walls.
The Woodland Trust suggest the use of NFMs here in Dinas Powys. They say “Across the UK we work with many partners to reduce flooding impacts, with the use of natural measures which include tree planting or supporting the re-wetting of peat soils and habitats. Natural processes help to reduce surface water run-off into our rivers and streams by slowing the speed at which it enters and storing water within the trees and through natural dams created within woodlands”
Natural flood management is becoming an increasingly important part of managing flood risk around the country and we feel that there is great potential for it to be introduced in Dinas Powys.
Removal of Obstacles Downstream
During the public engagement on NRWs Outline Business Case in February 2020 local people came up with a huge range of ideas for reducing flood risk when it rains heavily and the river level rises.
- Managing the river channel by clearing natural (eg silt, vegetation and invasive trees) and man-made obstructions (eg hopping trolleys, washing machines and bicycles!).
- Reducing obstructions to flow caused by bridge structures (eg the A4055 road bridge and the redundant Cross Common Road bridge).
- Dredging the river at Bryn-y-Don to usher water onto the Dinas Powys Moors.
- Exploring pumping technology
- Investigating and addressing flood risk at Sully Moors Road
- Flood walls on selected stretches of the river
- Local resilience (eg sandbags, air brick flaps and door covers).
Our role will be to work productively with NRW and the Vale of Glamorgan Council to promote and support work which will see these ideas put into action.
© Terry Brooks