Pembroke Commons River Enhancement Works
Client: Pembroke 21C Community Association Ltd
Nearly 1 km of new and existing channel was enhanced using bioengineering techniques as part of a flood protection project in the centre of historic Pembroke, South Wales. The upper reach of this small stream previously ran in a confined concrete U channel and provided little ecological or landscape value. A new sinuous channel was created, stabilised and enhanced using bioengineering techniques. Pre-Established Coir Rolls, grown with a site specific species mix was installed at the toe of the stream bank to establish marginal vegetation and prevent bank scour. The stream banks were seeded with a local wildflower mix and protected with a biodegradable erosion control blankets (NAG C125BN). The new channel is an effective flood reduction measure, whilst providing a valuable ecological habitat and a landscape focus in the town.
Materials used: NAG C125BN, Coir Rolls
The old concrete channel, left.
New channel, right
Coir Roll and NAG C123BN are installed
to the new channel
Completed bioengineering works
in the new cut channel
The new cut channel after 8 months
of plant establishment
The diverse wildflowers now
established on the stream bank
