Case study:River Brent at Brent Cross

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Location: 51° 34' 31.87" N, 0° 13' 14.31" W

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Project overview

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Status	Complete
Project web site
Themes
Country	England
Main contact forename	Penelope
Main contact surname	Calver
Main contact user ID
Contact organisation	Environment Agency
Contact organisation web site
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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Divert channel to accommodate expansions in Brent Cross shopping centre. Improved public access and visual amenity of river corridor. River diversion planned as 2-stage channel to allow for both high and low flows and to include greater sinuosity. Removal of concrete channel, natural banks, riffle creation, footpath creation. incorporation of reedbeds and marginal vegetation. Disabled access provision along the footpath with access ramps. Brent & Clitterhouse being restored as part of Brent cross regeneration. New shopping and car-parking facilities have provided opportunites for environmental enhancements along the River Brent which flows adjacent to the Brent Cross shopping centre. Originally much of the Brent Cross site was a shallow part of the Brent reservoir and the River Brent ran further to the south than its present course. In the late 1930's, this part of the reservoir was filled in for the construction of the North Circular Road adn the river diverted along its present course. Due to concerns about flooding, the river was straightened within an oversized concrete channel in order that flood flows could be accommodated with in the channel.

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Catchment and subcatchment Select a catchment/subcatchment 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 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 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