Case study:River Gaywood – Seven Sisters Drain

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Location: 52° 45' 2.75" N, 0° 24' 20.87" E

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Project overview

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Status	Complete
Project web site	http://www.norfolkriverstrust.org/
Themes	Habitat and biodiversity, Social benefits
Country	England
Main contact forename	the
Main contact surname	RRC
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Parent multi-site project
This is a parent project encompassing the following projects	No

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Project summary

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Norfolk Rivers Trust, King’s Lynn Internal Drainage Board and the Borough Council have teamed up to improve an abandoned area of King’s Lynn. Seven Sisters Drain, which runs behind the football club has long been abandoned becoming a silted, overgrown dumping ground, being filled with everything from crisp packets to sofas. Together we are working to transform this forgotten corner, clearing the overgrown vegetation and cutting a new channel for the water to move through. This will then be planted with a collection of native plants to improve the water quality and attract insects and amphibians to this new wildlife haven.

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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 Anglian River basin North West Norfolk Subcatchment River name Gaywood River Area category 10 - 100 km² Area (km2) Maximum altitude category Less than 100 m Maximum altitude (m) 9393 m <br />0.093 km <br />9,300 cm <br /> Dominant geology Calcareous Ecoregion Great Britain Dominant land cover Arable and Horticulture Waterbody ID GB105033047680 Other case studies in this subcatchment: Nine Chalk Rivers Project - Gaywood Catchment Site Edit site Name Seven Sisters Drain WFD water body codes GB105033047680 WFD (national) typology WFD water body name Gaywood River 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 Works started Works completed Project completed Total cost category Total cost (k€) 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 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 Abandoned stream Hydromorphology Biology Physico-chemical Other reasons for the project Measures Edit Measures Structural measures Bank/bed modifications Floodplain / River corridor Vegetation management, Restoring riparian vegetation, Large scale planting of native species Planform / Channel pattern Improvement of channel morphology, Channel naturalisation 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 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 Supplementary Information Edit Supplementary Information