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. Inter tidal rivers offer a unique challenge for bioengineering solutions due to the water quality, high salinity, the highly variable water levels and long periods of inundation that occurs with the tidal influence. In addition, the nature of the fine alluvial soils in estuaries and the turbulent flows and wave action means that erosion is prevalent where no vegetation occurs. Salix have developed bio engineering techniques to suit these environments and can establish inter tidal plant species, including plants grown from local provenance seed. We can also carry out more traditional methods such as sheet piling. Read our in-depth article on bioengineering techniques applied in the Thames Estuary and how they work with natural processes and plant species in order to provide long term bank stability whilst creating these vital missing habitats.


Case Studies

Intertidal vegetated estuary edges
News

Estuary Edges

Salix co-authored in the first volume of Estuary Edges, having been involved in a significant number of projects within the tidal extent of the River Thames.

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Exeter FAS Rock Mattresses fully vegetated naturally
Solution

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, nat…

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Rock Mattresses erosion control on Exeter Flood Defence Scheme
News

Erosion Control on Exeter Flood Defence

Staff at Exeter Flood Defence Project were delighted when within a few weeks mullet were feeding at the base of the erosion control Rock Mattresses.

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Rock Rolls, Rock Mattresses and Brushwood Fascines preventing erosion on the River Crouch
News

Inter tidal Erosion Protection on the River Crouch

The Environment Agency commissioned our erosion products on the tidal River Crouch. Inter tidal rivers are notably difficult to manage, our Rock Mattresses, Roc…

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Royal Wharf intertidal reed bed solution
Solution

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 app…

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Exeter-FAS-Rock-Mattress-Installation
News

Erosion Control Products Provide Homes for Wildlife

Salix’s Rock Mattresses, Coir Rolls & Coir Pallets are being used on the Exeter FAS Scheme enhancing wildlife habitats whilst giving cost effective erosion cont…

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Titchwell Marshes Rock Rolls close up
News

Salix Rock Rolls Protect Titchwell Marsh

As part of a series of measures to protect the freshwater habitats at Titchwell Marsh Nature Reserve on the north Norfolk coast, Salix has supplied the Royal So…

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River-Tywi-Looking-downstream
News

Salix on the River Tywi

Client – Wales & West Utilities Salix have been awarded a design and build contract on the River Tywi in Carmarthen. Various bioengineering techniques will…

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Solution

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 vertic…

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Solution

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 Environ…

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Solution

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 g…

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Solution

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 see…

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