Case study:RSPB Fowlmere Nature Reserve

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Location: 52° 5' 26.27" N, 0° 2' 59.69" E

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Project overview

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Status	Complete
Project web site
Themes	Habitat and biodiversity, Hydromorphology, Social benefits, Water quality
Country	England
Main contact forename	Jenny
Main contact surname	Mant
Main contact user ID
Contact organisation	River Restoration Centre
Contact organisation web site	http://www.therrc.co.uk
Partner organisations	Environment Agency
Parent multi-site project
This is a parent project encompassing the following projects	No

Faggots on the restored Fowlmere

Project summary

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The river had been heavily dredged in the past, resulting in a distinct lack of gravel within the river, and the channel was over-deep and filled with silt. Long profile surveys also indicated that the natural profile of the river had been significantly altered. Habitat restoration work progressed in three phases:

- Riffle creation in March 2006 (~30m) - Marginal habitat enhancement in 2007 (~150m) - Bed raising combined with channel narrowing in 2009 (~250m)

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Image gallery

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Narrowing of the channel at Fowlmere, April 2008

Narrowing channel at Fowlmere, April 2008

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 Cam and Ely Ouse (including South Level) Subcatchment River name Shep Area category 10 - 100 km² Area (km2) Maximum altitude category 100 - 200 m Maximum altitude (m) 167167 m <br />0.167 km <br />16,700 cm <br /> Dominant geology Calcareous Ecoregion Great Britain Dominant land cover Arable and Horticulture Waterbody ID GB105033038080 Site Edit site Name Fowlmere Nature Reserve WFD water body codes GB105033038080 WFD (national) typology WFD water body name Shep Pre-project morphology High width:depth, Single channel, Straight Reference morphology 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 Silt, Sand River corridor land use Grassland Average bankfull channel width category 2 - 5 m Average bankfull channel width (m) Average bankfull channel depth category 2 - 5 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) 600 m0.6 km <br />60,000 cm <br /> Project started 2006/03/01 Works started Works completed 2009/12/01 Project completed Total cost category 10 - 50 k€ Total cost (k€) 14 k€14,000 € <br /> Benefit to cost ratio Funding sources Environment Agency 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 Width & depth variation, Quantity & dynamics of flow, Substrate conditions Biology Fish: Abundance, Invertebrates, Macrophytes Physico-chemical Other reasons for the project Landscape enhancement, Nature development, Recreation Measures Edit Measures Structural measures Bank/bed modifications Cut back of plants, Riffle creation, Placement of log steps to prevent erosion from deer, Bed raising, Placement of faggots Floodplain / River corridor Riparian enhancement Planform / Channel pattern Increase in sinuosity, Narrowing of channel Other Non-structural measures Management interventions Easier management 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 Width & depth variation Yes Yes Improvement Quantity & dynamics of flow Yes Yes Improvement Substrate conditions Yes Yes Improvement Biological quality elements Edit biological quality elements Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Fish: Abundance Yes Yes Yes Yes Improvement Invertebrates Yes Yes Yes Improvement Macrophytes Yes Yes Yes Improvement 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 awareness of river Yes 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://publications.environment-agency.gov.uk/PDF/GEAN0910BSPO-E-E.pdf WFD Classification for River Shep - See page 231. http://http://www.therrc.co.uk/case studies/rrc%20fact%20sheet shep%20at%20rspb%20fowlmere.pdf River Restoration Centre Case Study Supplementary Information Edit Supplementary Information