Case study:Wensum River Restoration and Floodplain Enhancement

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Location: 52° 49' 35.06" N, 0° 52' 0.46" E

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Project overview

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Status	In progress
Project web site
Themes	Fisheries, Social benefits, Water quality
Country	England
Main contact forename	Tim
Main contact surname	Nevard
Main contact user ID
Contact organisation	Pensthorpe Conservation Trust Ltd
Contact organisation web site
Partner organisations
Parent multi-site project
This is a parent project encompassing the following projects	No

The project plan

Project summary

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Once the project is complete, approximately 2.5km of the River Wensum flowing through Pensthorpe will have restored ecological and hydrological functionality and provide habitats for a range of key chalk river species such as brown trout, white-clawed crayfish, Desmoulin’s whorl snail and water crowfoot. In addition to this, the adjoining floodplain will have significantly enhanced connectivity to the river and diffuse pollution from both Fakenham and adjoining agricultural land will have been mitigated.

Monitoring surveys and results

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Lessons learnt

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Image gallery

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A stretch of the river pre-restoration

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 US Norwich Area category 100 - 1000 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 GB105034055881 Other case studies in this subcatchment: Great Ryburgh End Restoration Scheme, Meander reinstatement on the River Wensum at the Ryburgh Loop, River Wensum Restoration, Reach 10 Lenwade, River Wensum Restoration, Reach 3a Costessey, River Wensum Restoration, Reach 9 Attlebridge, River rehabilitation on the River Wensum at Swanton Morley, Sculthorpe Moor Restoration Scheme, Wensum River Restoration and Floodplain Enhancement, Pensthorpe Site Edit site Name WFD water body codes GB105034055881 WFD (national) typology WFD water body name Wensum US Norwich Pre-project morphology Reference morphology Desired post project morphology Heavily modified water body No 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 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) Project started 2012/07/01 Works started Works completed Project completed 2015/03/01 Total cost category Total cost (k€) Benefit to cost ratio Funding sources Defra Catchment Restoration Fund 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 Pollution incident Hydromorphology Biology Fish, Invertebrates Physico-chemical Other reasons for the project Landscape enhancement Measures Edit Measures Structural measures Bank/bed modifications habitat improvements Floodplain / River corridor Floodplain reconnection, Reedbed creation, Creation of wetland Planform / Channel pattern Other Non-structural measures Management interventions Social measures (incl. engagement) Community involvement 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 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 RRC Monitoring table - Wensum Additional documents and videos Upload additional documents CRF Project briefing note - Wensum Additional links and references Edit links and references Link Description Supplementary Information Edit Supplementary Information