Case study:The Pentney Restoration Project

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Location: 52° 40' 55.56" N, 0° 30' 7.80" E

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Project overview

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Status	Complete
Project web site	http://www.norfolkriverstrust.org/trust_project/river-nar-pentney/
Themes	Habitat and biodiversity, Hydromorphology
Country	England
Main contact forename	the
Main contact surname	RRC
Main contact user ID	User:JoshRRC
Contact organisation
Contact organisation web site	http://www.norfolkriverstrust.org/trust project/river-nar-pentney/
Partner organisations
Parent multi-site project
This is a parent project encompassing the following projects	No

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Project summary

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The River Nar has been historically modified for human use, changing its channel size and shape, and in places the river’s course. These changes have negatively impacted on the wildlife of the river. The River Nar below Narborough is heavily modified flowing between steep flood banks, with little in stream character. The proposed project, which runs from Pentney Abbey to Blackborough End (see map), looks at improving habitat diversity and wildlife. Project aims to improve:

The channel morphology,the flow regime, fish spawning habitat, fish & invertebrate habitat, aquatic and riparian plant habitat.

The project is currently going through the design and consultation process. Expected delivery in autumn/winter 2014.

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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 Nar Area category 100 - 1000 km² Area (km2) Maximum altitude category Less than 100 m Maximum altitude (m) 2121 m <br />0.021 km <br />2,100 cm <br /> Dominant geology Calcareous Ecoregion Great Britain Dominant land cover Arable and Horticulture Waterbody ID GB105033047792 Other case studies in this subcatchment: Emmanuel’s Common Reconnection Project Site Edit site Name WFD water body codes GB105033047792 WFD (national) typology WFD water body name Nar DS Blackborough Drain 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 2014/10/01 Works started Works completed Project completed 2016/03/31 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 Human modification Hydromorphology Biology Wildlife degradation Physico-chemical Other reasons for the project Measures Edit Measures Structural measures Bank/bed modifications Recovery of channel morphology, Introduction of spawning gravels Floodplain / River corridor Habitat creation, Habitat enhancement, Riparian habitat restoration, Riparian planting Planform / Channel pattern 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