Category: Salt Marshes & Intertidal Rivers

Salix have extensive experience of design and implementation of bioengineering works within inter tidal rivers.

We co-authored the Environment Agency publication “Estuary Edges: Ecological Design Guidance” together with Mike Wells of Biodiversity By Design, demonstrating our knowledge in this challenging environment.

Natural sediment accretion and vegetation colonisation after 5 months

River Towy, Bank Erosion, Carmarthen

Aqua Rock Bags were installed at the eroded toe of the failing riverbank after it had eroded the bank and caused the footpath to collapse into the River Towy in the centre of Carmarthen.

Exeter FAS prior to Rock Mattress Installation

High Energy Inter Tidal Solution on the River Exe

Salix’s Ready-filled Rock Mattresses provided a solution to flood protection works needed on the River Exe. This quick and cheap approach provided a stable, natural embankment on the high energy intertidal river.

Royal Wharf intertidal reed bed solution - 2 years after installation

Intertidal Planting Solution on River Thames

Creating a reed bed on an intertidal part of the Thames river is challenging – but Salix achieved a fantastic result as a consequence of their unique design approach.

Vegetation Establishment 18 Months Later

River Roding Bank Protection

Salix advised engineers Halcrow on bioengineering methods to stabilise a regraded slope as part of an inter-tidal river enhancement project. The existing vertical retaining wall provided no habitat value.

Training day on intertidal restoration work

River Roding Enhancement

The River Roding is an inter-tidal river and these works were undertaken 100m upstream of the Barking Barrier, Greater London. The works were part of an Environment Agency environmental enhancement project with both flood defence and nature conservation in mind.

River Tywi

Salix were awarded a design and build contract to prevent further erosion of a section of the riverbank and reinstate a scour hole threatening a high pressure gas pipeline on the River Tywi.

Before work commenced railway line Lewes

Railway Lane, Lewes

The integrity of the existing blockwork facing was deteriorating as a result of the tidal inundation and draw-down cycles together with areas of groundwater seepages emanating from the slope profile.