Case study:River Restoration at Hunworth (River Glaven)

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Location: 52° 52' 56.13" N, 1° 3' 56.48" E

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Project overview

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Status	Complete
Project web site	http://http://www.wildtrout.org/content/river-glaven-hunworth
Themes	Fisheries, Habitat and biodiversity, Hydromorphology, Land use management - agriculture
Country	England
Main contact forename	Ian
Main contact surname	Shepperd
Main contact user ID
Contact organisation	River Glaven Conservation Group
Contact organisation web site	http://http://www.riverglaven.co.uk/
Partner organisations	Environment Agency, Centre for Fisheries and Aquaculture Science, Wild Trout Trust
Parent multi-site project
This is a parent project encompassing the following projects	No

Looking downstream from the dismantled railway

Project summary

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The river restoration work carried out on the River Glaven at Hunworth was done with a view to returning the river to a more natural state. The scheme involved a number of organisations, including the Environment Agency, the Wild Trout Trust, the River Glaven Conservation Group and the Centre for Environment, Fisheries and Aquaculture. A variety of techniques were employed, including channel reprofiling, the reintroduction of gravels and the installation of cattle drinks.

Since the works were completed in 2010 the River Glaven (Waterbody ID: GB105034055780) has improved from Moderate ecological status (as designated in the Anglian River Basin Management Plan) to Good ecological status, with specific improvements in macroinvertebrate and fish populations.

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Image gallery

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Channel sinuosity was increased as a result of the scheme

The functioning of the gauging station has been comprimised by the restoration works

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 Norfolk Subcatchment River name Glaven Area category 10 - 100 km² Area (km2) Maximum altitude category 100 - 200 m Maximum altitude (m) 103103 m <br />0.103 km <br />10,300 cm <br /> Dominant geology Calcareous Ecoregion Great Britain Dominant land cover Arable and Horticulture Waterbody ID GB105034055780 Other case studies in this subcatchment: Nine Chalk Rivers Project - Glaven Catchment, River Glaven conservation group Site Edit site Name Hunworth WFD water body codes GB105034055780 WFD (national) typology Low, Small, Calcareous WFD water body name Glaven Pre-project morphology Straightened Reference morphology Sinuous Desired post project morphology Heavily modified water body Yes National/international site designation Local/regional site designations Protected species present Yes Invasive species present Yes Species of interest Dominant hydrology Groundwater Dominant substrate Gravel River corridor land use Intensive agriculture (arable) Average bankfull channel width category 5 - 10 m Average bankfull channel width (m) Average bankfull channel depth category 0.5 - 2 m Average bankfull channel depth (m) Mean discharge category 0.1 - 1.0 m³/s Mean annual discharge (m3/s) Average channel gradient category Less than 0.001 Average channel gradient Average unit stream power (W/m2) Project background Edit project background Reach length directly affected (m) 320320 m <br />0.32 km <br />32,000 cm <br /> Project started 2009/03/01 Works started 2013/08/02 Works completed 2010/08/18 Project completed 2011/01/01 Total cost category 10 - 50 k€ 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 l Hydromorphology Channel pattern/planform, Flow velocities, Quantity & dynamics of flow, Freshwater flow regime, Substrate conditions, Floodplain connectivity Biology Fish, Invertebrates, Macrophytes, Diatoms Physico-chemical Oxygen balance, Dissolved Oxygen Other reasons for the project Measures Edit Measures Structural measures Bank/bed modifications Channel reprofiling, reintroducing gravel, installation of cattle drinks Floodplain / River corridor Removal of embankments Planform / Channel pattern Increase in sinuosity Other Non-structural measures Management interventions Reduced maintenance 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