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.
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.
Products Used
Coir Rolls
Coir Rolls are an organic living revetment that provide erosion control and rapid vegetation establishment. Salix have developed a range of specific species mixes for use in all types of water bodies.
VMax³ C350
VmaxC350 is a permanent Turf Reinforcement for reinforcing soils. The VmaxC350 incorporates a coir fibre layer to provide instant erosion protection, whilst the three-dimensional grid provides significant long-term protection.
Pre-filled Rock Roll
Rock Rolls are a robust and permanent revetment for use around reservoirs, shorelines, lake edges, streams and river banks. They are cost-effective revetments that are suitable alternatives to rock rip rap and gabions in many scour applications.
