Case study:Lustrum Beck Flood Alleviation Scheme: Phase 2

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Location: 54° 32' 34.27" N, 1° 23' 4.67" W

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Project overview

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Status	In progress
Project web site	http://www.therrc.co.uk/sites/default/files/projects/21_lustrum.pdf
Themes	Flood risk management, Habitat and biodiversity, Hydromorphology, Land use management - agriculture, Land use management - forestry
Country	England
Main contact forename	Ted
Main contact surname	Thomas
Main contact user ID
Contact organisation	Environment Agency
Contact organisation web site	http://www.gov.uk/government/organisations/environment-agency
Partner organisations	Stockton-on-Tees Borough Council, Forestry Commission, Newcastle University
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 Lustrum Beck catchment (Map 1) is located in Stockton-on-Tees and is a tributary of the Tees. It has been identified through an ISIS-TUFLOW model that over 150 properties are at risk of flooding in the catchment within 2 main areas: Oxbridge and Browns Bridge. For these sites, the Lustrum Beck Flood Alleviation Scheme (FAS) has been split into 2 phases. Phase 1 is well underway and consists of constructing more traditional flood defences in the urban area of the catchment. Phase 2 is currently in the development stage and will involve storing water at a range of scales in the upstream catchment area using natural processes to attenuate water. This case study focuses on Phase 2 in the Lustrum Beck catchment and how natural processes are being incorporated into the scheme to reduce downstream risk. The model used identified that a total storage area of around 100,000m³ of storage within the local catchment area could reduce the discharge from the 1 in 100 year return period by 11.5%. This would reduce the peak flow of the 1 in 100 year event to less than 1 in 75 year event. The Lustrum Beck project is the first flood risk management scheme to develop a business case which includes the use of Natural Flood Management (NFM) to successfully attract Flood Defence Grant in Aid (FDGiA) funding to reduce flood risk.

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Catchment and subcatchment Select a catchment/subcatchment Site Edit site Name Lustrum Beck WFD water body codes 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) Project started 2014 Works started Works completed Project completed Total cost category Total cost (k€) £4m"£" is not declared as a valid unit of measurement for this property. Benefit to cost ratio Funding sources Flood and Coastal Risk Management, Environment Agency Grant in Aid, Local levy funding, Tees Rivers Trust 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 Flood risk management Hydromorphology Biology Physico-chemical Other reasons for the project Measures Edit Measures Structural measures Bank/bed modifications Floodplain / River corridor Offline storage areas 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