Case study:River Wensum Rehabilitation Project - Bintree

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Location: 52° 46' 52.77" N, 0° 57' 38.38" E

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Project overview

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Status	Complete
Project web site
Themes	Flood risk management, Habitat and biodiversity, Hydromorphology, Social benefits, Water quality
Country	England
Main contact forename	Nick
Main contact surname	Elbourne
Main contact user ID	User:NickRRC
Contact organisation	River Restoration Centre
Contact organisation web site	http://www.therrc.co.uk
Partner organisations
Parent multi-site project	Case_study:Wensum River Restoration Strategy
This is a parent project encompassing the following projects	No

The River Wensum

Project summary

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In the past this section of the Wensum at Bintree Mill has been dredged creating a deepened and overwidened channel with uniform flow, and has suffered from over-grazing and trampling by Limosin cattle. The Bintree Angling Club had ownership of the fishing rights of this stretch of the river and implemented habitat improvements that to promote wild brown trout fishery with less reliance on stocking. This was achieved through channel narrowing, riffle installation, fencing, flow deflectors, tree planting and the creation of fenced cattle crossing points.

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Image gallery

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Wensum in February 2001

Wensum in February 2007

Cattle access point in 2001

Cattle access point in 2007

Catchment and subcatchment Select a catchment/subcatchment Edit the catchment and subcatchment details (affects all case studies in this subcatchment) Catchment River basin district Anglian River basin Broadland Rivers Subcatchment River name Wensum Area category 10 - 100 km² Area (km2) Maximum altitude category Less than 100 m Maximum altitude (m) 9898 m <br />0.098 km <br />9,800 cm <br /> Dominant geology Calcareous Ecoregion Great Britain Dominant land cover Arable and Horticulture Waterbody ID GB105034051110 Other case studies in this subcatchment: Wensum River Restoration Strategy Site Edit site Name Bintree WFD water body codes GB105034051100 WFD (national) typology R19 WFD water body name Wensum Pre-project morphology Single channel Reference morphology Single channel Desired post project morphology Heavily modified water body Yes National/international site designation EU - Special Area of Conservation Local/regional site designations Protected species present No Invasive species present No Species of interest Dominant hydrology Groundwater Dominant substrate Gravel River corridor land use Intensive agriculture Average bankfull channel width category 2 - 5 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) Average channel gradient category Average channel gradient Average unit stream power (W/m2) Project background Edit project background Reach length directly affected (m) 1500 m1.5 km <br />150,000 cm <br /> Project started 2000/08/01 Works started Works completed Project completed 2010/10/01 Total cost category 50 - 100 k€ Total cost (k€) 73 k€73,000 € <br /> Benefit to cost ratio Funding sources Cost for project phases Phase cost category cost exact (k€) Lead organisation Contact forename Contact surname Investigation and design Environment Ahgency Simon Johnson Stakeholder engagement and communication Works and works supervision Environment Agency Rob Dryden Post-project management and maintenance Monitoring Reasons for river restoration Edit reasons for restoration Mitigation of a pressure Agriculture Hydromorphology Channel pattern/planform, Quantity & dynamics of flow, Connection to groundwaters Biology Invertebrates Physico-chemical Other reasons for the project Flood risk management, Community demand Measures Edit Measures Structural measures Bank/bed modifications Bed raising Floodplain / River corridor Planform / Channel pattern Channel narrowing Other Non-structural measures Management interventions Social measures (incl. engagement) Other Participation in maintenance 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 Invertebrates: Taxonomic composition Yes Yes 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 Feasibility & Environmental Scoping Assessment Additional documents and videos Upload additional documents Additional links and references Edit links and references Link Description http://therrc.co.uk/case studies/wensum-%20bintree.pdf River Restoration Centre Case Study 2009 http://therrc.co.uk/case studies/wensum%20at%20bintree%20final.pdf River Restoration Centre Case Study 2010 http://http://www.environment-agency.gov.uk/homeandleisure/wildlife/114676.aspx River Wensum restoration project - EA pages Supplementary Information Edit Supplementary Information