A private developer had back gardens adjacent to a river that when in flood created severe scour issues. Initial river modelling indicated flow velocities in excess of 3.5m/sec.
A private developer had back gardens adjacent to a river that when in flood created severe scour issues. Initial river modelling indicated flow velocities in excess of 3.5m/sec.
Typically, the river looked more like a small stream with a low base flow, but in flood it became a significant risk. Original engineer designs preferred a gabion option but after meeting the developer on site, Salix proposed a value engineering option. The solution was to use Rock Rolls at the toe, with a pre-established Coir Roll. For protection of the banks C350 and P550 was installed.
The Rock Rolls will provide permanent vegetative reinforcement, allowing the area to look natural and green but with an engineered solution that will withstand bankfull flood events.
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.
Native Plants
Salix are the UK’s largest grower of native wetland and wildflowering plants in the UK – perfect for use in green infrastructure, peatland restoration, wetland restoration and creation and other habitat projects In response to demand for a wider range of species for specific habitat types we have developed a range of plug grown species for three key habitats: Salt marsh, Sand dunes & Moorlands. Wetland Plants Salt Marsh Moorlands Sand Dunes Salix are the largest grower of native wetland plants in the UK. Salix wetland nurseries have been designed and built specifically for commercially growing native wetland plants for supply
VMax³ P550
VMax³ P550 is composed of a permanent, ultra-high-strength, three-dimensional matting structure incorporated with a permanent 100% polypropylene fibre matrix.
Details
Client: Gower Homes
Location: Wrexham
High Energy Rivers, Rivers & Water Courses
Cross Sections
