Case study:Quaggy channel improvements

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Location: 51° 27' 35.67" N, 0° 0' 19.42" W

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Project overview

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Status	Complete
Project web site
Themes	Flood risk management
Country	England
Main contact forename	Toni
Main contact surname	Scarr
Main contact user ID	User:Ascarr
Contact organisation	Environment Agency
Contact organisation web site	http://www.environment-agency.gov.uk
Partner organisations	Quaggy Waterways Action Group
Parent multi-site project	Case_study:Quaggy Flood Alleviation Scheme
This is a parent project encompassing the following projects	No

gravel introduced into the channel and new wall

Project summary

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Along the stretch of river between Weigall Road and the centre of Lewisham, the Quaggy runs through rear gardens, beneath roads and along open urban spaces.

Some of the houses close to the river, mostly terraced homes, were at high risk of flooding. Our innovative approach allowed us to integrate flood defences sensitively within people’s gardens. These are now set back from the river, recovering land that can be used as part of the flood plain.

The riverbed has also been altered to create a more natural river with meanders and areas of deep and shallow water. Faster and slower flowing areas improve habitat for wildlife. Specialist bird boxes have been built into brick walls to provide nesting sites for grey wagtail and wrens.

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Catchment and subcatchment

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Site

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Name	Weigall Road to Lewisham
WFD water body codes	GB106039023290
WFD (national) typology	Calcareous
WFD water body name	Quaggy
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	Japanese Knotweed
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Dominant substrate
River corridor land use	Urban
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Average bankfull channel width (m)
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Project background

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Reasons for river restoration

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Mitigation of a pressure
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Measures

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Monitoring

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general information

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