Case study:De-culverting Moselle Brook at Lordship Recreation Ground

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Location: 51° 35' 40.76" N, 0° 5' 11.85" W

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Project overview

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Status	Complete
Project web site
Themes	Habitat and biodiversity, Social benefits
Country	England
Main contact forename	Mel
Main contact surname	Challis
Main contact user ID
Contact organisation	Environment Agency
Contact organisation web site	http://www.environment-agency.gov.uk
Partner organisations	Haringey Council, Friends of Lordship recreation ground
Parent multi-site project
This is a parent project encompassing the following projects	No

Looking upstream along de-culverted section of Moselle Brook

Project summary

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culverted section of Moselle Brook through Lordship Recreation Ground was daylighted. New meandering channel dug with 30 degree banks planted with native species (mostly) . New channel planted with flowering rush, sedge and flag. Appearance of new channel looked excellant, however due to the number of mis-connectiosn upstream the channel wa sfull of sewage fungus and the water had a strong smell of raw sewage.

Monitoring surveys and results

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Lessons learnt

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Catchment and subcatchment

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Site

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Name	Moselle Brook at Lordship Recreation Ground
WFD water body codes
WFD (national) typology
WFD water body name
Pre-project morphology
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	Yes
Species of interest
Dominant hydrology	Quick run-off
Dominant substrate	Silt
River corridor land use	Urban, Parklands garden
Average bankfull channel width category	2 - 5 m
Average bankfull channel width (m)
Average bankfull channel depth category	0.5 - 2 m
Average bankfull channel depth (m)
Mean discharge category	1 - 10 m³/s
Mean annual discharge (m3/s)
Average channel gradient category	0.001 - 0.01
Average channel gradient
Average unit stream power (W/m2)

Project background

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Reach length directly affected (m)	300300 m <br />0.3 km <br />30,000 cm <br />
Project started
Works started	2011/09/01
Works completed	2012/02/01
Project completed
Total cost category	more than 10000 k€
Total cost (k€)
Benefit to cost ratio
Funding sources	Help a London Park, Environment Agency

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

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Mitigation of a pressure	culverted watercourse
Hydromorphology	Channel pattern/planform, Quantity & dynamics of flow, Width & depth variation
Biology	Macrophytes and/or phytobenthos: Taxonomic composition
Physico-chemical	Specific non-synthetic pollutants, Oxygen balance, Nutrient concentrations
Other reasons for the project	Socio-economic

Measures

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Structural measures
Bank/bed modifications	Bank re-grading, Culvert replacement/repair
Floodplain / River corridor	Riparian planting, Sustainable urban drainage ponds (SUDs)
Planform / Channel pattern	deculverting
Other
Non-structural measures
Management interventions
Social measures (incl. engagement)	Improved public access, Information panels for people, riverside walkway
Other

Monitoring

Hydromorphological quality elements

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quality elements

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

Biological quality elements

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quality elements

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

Physico-chemical quality elements

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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

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	Before measures	After measures	Qualitative	Quantitative

Monitoring documents

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Image gallery

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Additional links and references

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Supplementary Information

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