Treboeth Cobble Channel

Treboeth eroding cobble bed channelTreboeth post-installationTreboeth two months laterTreboeth one year later
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Treboeth eroding cobble bed channel

A new development had slope stability issues due to an adjacent cobble bed watercourse badly eroding the soils and downcutting the bed within the channel. The steep channel gradient had a very flashy, aggressive flow regime. Salix were recommended to the developer by a previous client to provide design & build solution.

A more cost effective, sustainable alternative to blockstone was proposed using a turf reinforcement matting (TRM) called VMax C350 on the re-graded slopes.

Vmax C350 is a UV stabilised permanent TRM that reinforces the vegetation on the banks allowing the grass to take flows of up to 6m/sec without soil loss.

Rock Rolls were installed at the toe to withstand the abrasive action of cobbles and gravels under flood conditions, with a living element of a pre-established Coir Roll containing native marginal plant species to encourage plant growth through the Rock Rolls.

Rock Rolls are a flexible system, pre-filled off site with small stone that allows accretion of sediment and roots to grow through and also allow movement of benthic invertebrates within the riparian zone and water.

Details

Name: Treboeth Cobble Channel
Client: Private Developer
Location: Swansea
Category: High Energy Rivers, Rivers & Water Courses

Products Used

Case Study

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Treboeth Cobble Channel Case StudyDownload 

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