Case study:Day Brook Restoration - Gedling

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Location: 52° 59' 38.90" N, 1° 8' 15.42" W

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Project overview

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Status	Complete
Project web site
Themes	Flood risk management, Habitat and biodiversity, Urban
Country	England
Main contact forename	John
Main contact surname	Brewington
Main contact user ID	User:John Brewington
Contact organisation	Environment Agency
Contact organisation web site	http://www.environment-agency.gov.uk
Partner organisations	Groundwork Greater Nottingham, Environment Agency, Nottinghamshire County Council, Gedling Borough Council
Parent multi-site project
This is a parent project encompassing the following projects	No

Project picture

Project summary

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This project restored natural features to a section of the Day Brook as it flows through a small park on the outskirts of Nottingham city.

The brook was moved from the existing heavily modified and shaded channel into a more natural course. Brook length has been increased with the introduction of meanders along with shallower, soft banks and variation in flow and bed conditions. We aim to improve water quality through the planting of marginal vegetation and the creation of a reed bed at the outfall of a surface water sewer.

With the material produced from the channel excavations, a shallow bund has been constructed to retain flood waters within the park in order to help reduce flooding of downstream properties.

In an effort to raise awareness of the watercourse and to create a more attractive park environment, 2 new bridges now take an existing path over the new brook channel.

This part of the brook is one of the few sections not within a culvert as it flows through Gedling Borough. Downstream the brook mostly flows within a heavily modified channel and the entire length is subject to pollution from diffuse, urban sources.

This project is a sister project to the Day Brook rain gardens - http://restorerivers.eu/wiki/index.php?title=Case_study%3ADay_Brook_Rain_Gardens

Restoration work commenced in February 2014 and was completed in May 2014.

Photos of the works are available at https://www.flickr.com/photos/environment-agency/sets/72157644692138259/?view=sq.

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Day Brook before

Day Brook before

Day Brook construction

Catchment and subcatchment Select a catchment/subcatchment Edit the catchment and subcatchment details (affects all case studies in this subcatchment) Catchment River basin district Humber River basin Lower Trent and Erewash Subcatchment River name Day Brook from Source to River Lean Area category 10 - 100 km² Area (km2) Maximum altitude category 100 - 200 m Maximum altitude (m) 153153 m <br />0.153 km <br />15,300 cm <br /> Dominant geology Calcareous Ecoregion Great Britain Dominant land cover Suburban Waterbody ID GB104028052860 Other case studies in this subcatchment: Day Brook Rain Gardens Site Edit site Name WFD water body codes GB104028052860 WFD (national) typology WFD water body name 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) 115115 m <br />0.115 km <br />11,500 cm <br /> Project started Works started 2014/02/03 Works completed Project completed Total cost category Total cost (k€) Benefit to cost ratio Funding sources Environment Agency - Nottinghamshire County Council - Gedling Borough Council - B&Q Cost for project phases Phase cost category cost exact (k€) Lead organisation Contact forename Contact surname Investigation and design 1 - 10 k€ Groundwork Greater Nottingham Paul Crawford Stakeholder engagement and communication Less than 1 k€ WatersideCare Lee Copplestone Works and works supervision 100 - 500 k€ Groundwork Greater Nottingham Paul Crawford Post-project management and maintenance Monitoring Reasons for river restoration Edit reasons for restoration Mitigation of a pressure Flood risk management Hydromorphology Channel pattern/planform, Quantity & dynamics of flow, Width & depth variation Biology Physico-chemical Nutrient concentrations, Specific synthetic pollutants, Oxygen balance Other reasons for the project Community demand, Landscape enhancement Measures Edit Measures Structural measures Bank/bed modifications Channel reprofiling, Recovery of channel morphology Floodplain / River corridor Floodplain reconnection Planform / Channel pattern Channel naturalisation, Re-meandering Other Non-structural measures Management interventions Social measures (incl. engagement) Community awareness of urban catchment challenges 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