Case study:River Roding at Ray Lodge Park

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Location: 51° 36' 59.43" N, 0° 3' 11.60" E

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Project overview

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Status	Complete
Project web site
Themes	Habitat and biodiversity, Hydromorphology, Social benefits
Country	England
Main contact forename	John
Main contact surname	Bryden
Main contact user ID
Contact organisation	Environment Agency
Contact organisation web site	http://www.environment-agency.gov.uk
Partner organisations
Parent multi-site project
This is a parent project encompassing the following projects	No

River Roding after the restoration project

Project summary

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After works on a nearby motorway (the M11) in the 1970's ans 1980's, the River Roding was artificially diverted and straightened, resulting in poor quality wildlife habitat. The restoration project looked to address this by creating new habitats for a range of species including water voles, dragonflies and numerous fish species, without a reduction in flood protection. This was achieved through bank re-profiling, backwater creation and planting of the rivers banks.

Monitoring surveys and results

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Lessons learnt

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Image gallery

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River Roding prior to the project

The created backwater

The backwater after the establishment of vegetation, September 2009

Catchment and subcatchment Select a catchment/subcatchment Edit the catchment and subcatchment details (affects all case studies in this subcatchment) Catchment River basin district Thames River basin Roding, Beam and Ingrebourne Subcatchment River name Roding (Cripsey Brook to Loxford Water) Area category 100 - 1000 km² Area (km2) Maximum altitude category 100 - 200 m Maximum altitude (m) 124124 m <br />0.124 km <br />12,400 cm <br /> Dominant geology Calcareous Ecoregion Great Britain Dominant land cover Arable and Horticulture Waterbody ID GB106037028180 Other case studies in this subcatchment: Chigwell Brook, Fresh Wharf, Land opposite Wanstead Park, Valentines Park, Weir upstream of Redbridge roundabout Site Edit site Name Ray Lodge Park WFD water body codes GB106037028180 WFD (national) typology WFD water body name Roding (Cripsey Brook to Loxford Water) Pre-project morphology Single channel, Impounded, High width:depth Reference morphology Single channel, Sinuous, Pool-riffle 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 Quick run-off Dominant substrate Bedrock River corridor land use Urban Average bankfull channel width category 5 - 10 m Average bankfull channel width (m) Average bankfull channel depth category 0.5 - 2 m Average bankfull channel depth (m) Mean discharge category Mean annual discharge (m3/s) 1.851.85 m³/s <br />1,850 l/s <br /> Average channel gradient category Average channel gradient Average unit stream power (W/m2) Project background Edit project background Reach length directly affected (m) 150 m0.15 km <br />15,000 cm <br /> Project started 2007/08/01 Works started 2007/10/01 Works completed 2008/01/01 Project completed Total cost category 100 - 500 k€ Total cost (k€) 175 k€175,000 € <br /> Benefit to cost ratio Funding sources London Borough of Redbridge, Environment Agency Cost for project phases Phase cost category cost exact (k€) Lead organisation Contact forename Contact surname Investigation and design Environment Agency Stakeholder engagement and communication Environment Agency Works and works supervision Environment Agency Post-project management and maintenance Environment Agency Monitoring Environment Agency Reasons for river restoration Edit reasons for restoration Mitigation of a pressure Hydromorphology Channel pattern/planform, Quantity & dynamics of flow Biology Physico-chemical Other reasons for the project Landscape enhancement, Inter-tidal enhancement, Community demand Measures Edit Measures Structural measures Bank/bed modifications Removal of revetments, Depth variations, Planting, Re-profiling Floodplain / River corridor Removal of embankments Planform / Channel pattern Creation of backwater, Creation of pond, Sinuosity Other Non-structural measures Management interventions Social measures (incl. engagement) Other Participation in maintenance, Consultation, Participation in design 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 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 Public Accessibility Yes Yes Improvement Monitoring documents Upload monitoring documents Additional documents and videos Upload additional documents Additional links and references Edit links and references Link Description http://www.therrc.co.uk/case studies/roding%20at%20redbridge.pdf River Restoration Centre Case Study Supplementary Information Edit Supplementary Information