Case study:Knepp Rewilding Project

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Location: 50° 58' 40.98" N, 0° 21' 33.26" W

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Project overview

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Status	Complete
Project web site	http://knepp.co.uk
Themes	Environmental flows and water resources, Flood risk management, Habitat and biodiversity, Hydromorphology, Land use management - agriculture, Social benefits, Water quality
Country	England
Main contact forename	Penny
Main contact surname	Green
Main contact user ID	User:Penny Green
Contact organisation	Knepp Castle Estate
Contact organisation web site	http://knepp.co.uk
Partner organisations	Environment Agency, Sussex Wildlife Trust, West Sussex County Council and Natural England
Parent multi-site project
This is a parent project encompassing the following projects	No

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Project summary

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Jointly funded by Natural England and the Knepp Estate, the restoration of the upper reaches of the River Adur lies at the heart of the largest rewilding project in lowland UK.

The work, carried out by the Environment Agency, has involved removing 4 weirs, returning 2.4km of canalised river to its original meanders and linking it to 5.5kms of restored floodplain upstream.

It is part of a landscape-scale conservation enterprise aimed at restoring the full range of hydrological processes from the moment raindrops fall on the land, filtering through vegetation and the soil, to their passage into watercourses towards the sea.

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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 South East River basin Adur and Ouse Subcatchment River name Adur Area category 10 - 100 km² Area (km2) Maximum altitude category Less than 100 m Maximum altitude (m) 6969 m <br />0.069 km <br />6,900 cm <br /> Dominant geology Calcareous Ecoregion Great Britain Dominant land cover Improved grassland Waterbody ID GB107041012270 Site Edit site Name WFD water body codes WFD (national) typology WFD water body name Pre-project morphology Reference morphology Desired post project morphology Heavily modified water body National/international site designation Local/regional site designations Protected species present Invasive species present 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 2006/01/01 Works started 2011/09/01 Works completed 2013/12/31 Project completed 2013/12/31 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 Hydromorphology Biology Physico-chemical Other reasons for the project Measures Edit Measures Structural measures Bank/bed modifications Floodplain / River corridor 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