Case study:River Ebbw Bank Stabilisation

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Location: 51° 39' 18.52" N, 3° 8' 5.89" W

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Project overview

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Status	Complete
Project web site	http://salixrw.com/project/river-ebbw-bank-stabilisation
Themes
Country	Wales
Main contact forename	David
Main contact surname	Holland
Main contact user ID
Contact organisation	Salix River & Wetland Services Limited
Contact organisation web site	http://www.salixrw.com
Partner organisations
Parent multi-site project
This is a parent project encompassing the following projects	No

Following restoration

Project summary

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This project aimed to stabilise a highly erodible bank consisting mainly of colliery shale by using a green, visually appealing method. Rock rolls and live willow bundles (faggots) were placed to protect toes. The upper bank was protected using high performance erosion control mats and native willow cutting. Locally occurring riverside grasses and rushes were planted to revegetate the marginal areas.

The River Restoration Centre would like to thank David Holland from Salix River & Wetland Services Limited for providing the information and photographs for this case study.

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Catchment and subcatchment Select a catchment/subcatchment Edit the catchment and subcatchment details (affects all case studies in this subcatchment) Catchment River basin district Severn River basin South East Valleys Subcatchment River name Ebbw R - conf Ebbw Fach R to Maes-glas Area category 100 - 1000 km² Area (km2) Maximum altitude category 200 - 500 m Maximum altitude (m) 472472 m <br />0.472 km <br />47,200 cm <br /> Dominant geology Siliceous Ecoregion Great Britain Dominant land cover Suburban Waterbody ID GB109056026910 Site Edit site Name River Ebbw WFD water body codes GB109056026910 WFD (national) typology Mid, Medium, Siliceous WFD water body name Ebbw R - conf Ebbw Fach R to Maes-glas Pre-project morphology Reference morphology Desired post project morphology Heavily modified water body Yes National/international site designation Local/regional site designations Protected species present No Invasive species present No Species of interest Dominant hydrology Dominant substrate River corridor land use Average bankfull channel width category Average bankfull channel width (m) Average bankfull channel depth category Average bankfull channel depth (m) Mean discharge category 10 - 100 m³/s Mean annual discharge (m3/s) 8080 m³/s <br />80,000 l/s <br /> Average channel gradient category Average channel gradient Average unit stream power (W/m2) 4.2 4.2 W/m² <br /> Project background Edit project background Reach length directly affected (m) 800800 m <br />0.8 km <br />80,000 cm <br /> Project started 2005/01/02 Works started Works completed Project completed 2005/04/03 Total cost category 10 - 50 k€ Total cost (k€) 1515 k€ <br />15,000 € <br /> Benefit to cost ratio Funding sources Merrimans Ltd Cost for project phases Phase cost category cost exact (k€) Lead organisation Contact forename Contact surname Investigation and design Stakeholder engagement and communication Works and works supervision Post-project management and maintenance Monitoring Reasons for river restoration Edit reasons for restoration Mitigation of a pressure Hydromorphology Biology Physico-chemical Other reasons for the project Measures Edit Measures Structural measures Bank/bed modifications Bank stabilisation and erosion protection Floodplain / River corridor Planform / Channel pattern Other Non-structural measures Management interventions Social measures (incl. engagement) Other Monitoring Hydromorphological quality elements Edit Hydromorphological quality elements Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Biological quality elements Edit biological quality elements Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative [[]] No No No No No Physico-chemical quality elements Edit Physico-chemical quality elements Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Any other monitoring, e.g. social, economic Edit Other responses Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Monitoring documents Upload monitoring documents Additional documents and videos Upload additional documents Additional links and references Edit links and references Link Description http://salixrw.com/files/salixrw/case-studies/River%20Ebbw%20.pdf Salix Case study:River Ebbw Bank Stabilisation Supplementary Information Edit Supplementary Information