Case study:Firs Farm Wetlands

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Location: 51° 37' 42", -0° 5' 13"
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Project overview

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Status In progress
Project web site
Themes Environmental flows and water resources, Flood risk management, Habitat and biodiversity, Monitoring, Social benefits, Water quality, Urban
Country England
Main contact forename Ian
Main contact surname Russell
Main contact user ID
Contact organisation London Borough of Enfield
Contact organisation web site http://enfield.gov.uk/
Partner organisations Environment Agency, Thames Water, Greater London Authority, Thames 21, Friends of Firs Farm
Parent multi-site project

Case_study:Rewilding Enfield's Urban Rivers

This is a parent project
encompassing the following
projects
No
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Project summary

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Monitoring surveys and results

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Lessons learnt

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Image gallery


FF Before Works.JPG
FF Construction.JPG
FF Channel Construction.JPG
FF Wetlands Construction.JPG
FF Planting Event.JPG
FF Planted Wetlands.JPG
FF Pond and Channel.JPG
ShowHideAdditionalImage.png


Catchment and subcatchment

Catchment

River basin district Thames
River basin London

Subcatchment

River name Pymmes Brook (Salmons Brook to Lee, includes Part of Lee Navigation B)
Area category 10 - 100 km²
Area (km2)
Maximum altitude category Less than 100 m
Maximum altitude (m) 26
26 m
0.026 km
2,600 cm
Dominant geology Calcareous
Ecoregion Great Britain
Dominant land cover Urban
Waterbody ID GB106038027910



Other case studies in this subcatchment: Pymmes Park Wetlands


Site

Name Firs Farm Wetlands
WFD water body codes UKGB106038027910
WFD (national) typology
WFD water body name Pymmes Brook (Salmons Brook to Lee, includes Part of Lee Navigation B)
Pre-project morphology Closed culvert
Reference morphology
Desired post project morphology
Heavily modified water body Yes
National/international site designation
Local/regional site designations
Protected species present No
Invasive species present No
Species of interest
Dominant hydrology Surface Water Runoff, fluvial
Dominant substrate Clay, Gravel
River corridor land use Parklands, Grassland
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

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

Mitigation of a pressure Flood risk management, Poor Water Quality
Hydromorphology Quantity & dynamics of flow
Biology
Physico-chemical Oxygen balance, Nutrient concentrations, PH, Biological Oxygen Demand, Total Suspended Solids, Heavy Metals, Hydrocarbons
Other reasons for the project Improve Public Space, Improve Linkages, Improve Health and Wellbeing of local park users


Measures

Structural measures
Bank/bed modifications Deculverting, Ponds and pools inside the wetland
Floodplain / River corridor Creation of wetland, Creation of wet woodland, Creation of pond, Creation of side channel, Deculverting, Extensive planting, Sustainable urban drainage ponds (SUDs), Floodplain creation
Planform / Channel pattern
Other
Non-structural measures
Management interventions
Social measures (incl. engagement) Public amenity and perception, Community involvement, Community Education, Engagement with schools
Other


Monitoring

Hydromorphological quality elements

Element When monitored Type of monitoring Control site used Result
Before measures After measures Qualitative Quantitative

Biological quality elements

Element When monitored Type of monitoring Control site used Result
Before measures After measures Qualitative Quantitative

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

Element When monitored Type of monitoring Control site used Result
Before measures After measures Qualitative Quantitative


Monitoring documents



Additional documents and videos


Additional links and references

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Supplementary Information

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