Case study:Blake Avenue, Mayes Brook

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Location: 51° 31' 55.86" N, 0° 6' 1.16" E

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Project overview

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Status	Planned
Project web site
Themes	Flood risk management
Country	England
Main contact forename	Becca
Main contact surname	O’Shea
Main contact user ID
Contact organisation	Environment Agency
Contact organisation web site	http://www.gov.uk/government/organisations/environment-agency
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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To enhance the current flood storage area for nature conservation, including target BAP species such as water vole. This can be achieved by reinstating natural earth banks and the creation of a marginal aquatic zone. To create BAP habitats such as reedbeds and standing water in the form of wetlands and backwater creation. To allow and improve public access to the brook and help encourage environmental awareness and social involvement with local wildlife. Blake Avenue is a side-spill flood alleviation area situated on the right bank of Mayes Brook 3139m², located 500m upstream of County Gardens flood alleviation area. The channel within this section is straight with a reinforced right bank incorporating a sluice, which is located in the middle for drainage following flood events. The earth-bunded flood storage area comprises well maintained grassland, which is cut 4-6 times a year during the growing season. The area is inundated 3-4 times a year and requires dredging every 5-10years. The site is EA-owned and lies directly adjacent to residential properties.

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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 Thames River basin Roding, Beam and Ingrebourne Subcatchment River name Seven Kings Water Area category 10 - 100 km² Area (km2) Maximum altitude category 100 - 200 m Maximum altitude (m) 101101 m <br />0.101 km <br />10,100 cm <br /> Dominant geology Calcareous Ecoregion Great Britain Dominant land cover Suburban Waterbody ID GB106037028170 Other case studies in this subcatchment: County Gardens, Mayes Brook, Fairlop Plain and Fairlop Water, Goodmayes Park, Mayes Brook, Loxford Water, Mayesbrook Climate Change Park restoration project, Seven Kings Water Site Edit site Name WFD water body codes GB106037028170 WFD (national) typology WFD water body name Seven Kings Water 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 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 Flood risk management Hydromorphology Biology Vertebrates Physico-chemical Other reasons for the project Community demand Measures Edit Measures Structural measures Bank/bed modifications Bank reprofiling Floodplain / River corridor Reedbed creation Planform / Channel pattern Other UK BAP habitat creation/restoration Non-structural measures Management interventions Social measures (incl. engagement) Improved public access, Community Education 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