Case study:Quaggy channel improvements: Difference between revisions
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|File name=Quaggy FAS General Information, 28 May 08.pdf | |||
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Revision as of 11:24, 23 August 2012
This case study is pending approval by a RiverWiki administrator.
Project overview
Status | Complete |
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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 | |
Parent multi-site project | |
This is a parent project encompassing the following projects |
No |
Project summary
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.
Monitoring surveys and results
Lessons learnt
Catchment and subcatchment
Site
Name | Weigall Road to Lewisham |
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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 | |
Dominant hydrology | |
Dominant substrate | |
River corridor land use | Urban |
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) | |
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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 |
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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 | |
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Hydromorphology | |
Biology | |
Physico-chemical | |
Other reasons for the project |
Measures
Structural measures
| |
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Bank/bed modifications | |
Floodplain / River corridor | |
Planform / Channel pattern | |
Other | |
Non-structural measures
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Management interventions | |
Social measures (incl. engagement) | |
Other |
Monitoring
Hydromorphological quality elements
Element | When monitored | Type of monitoring | Control site used | Result | ||
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Before measures | After measures | Qualitative | Quantitative |
Biological quality elements
Element | When monitored | Type of monitoring | Control site used | Result | ||
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Before measures | After measures | Qualitative | Quantitative |
Physico-chemical quality elements
Element | When monitored | Type of monitoring | Control site used | Result | ||
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Before measures | After measures | Qualitative | Quantitative |
Any other monitoring, e.g. social, economic
Element | When monitored | Type of monitoring | Control site used | Result | ||
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Before measures | After measures | Qualitative | Quantitative |
Monitoring documents
Image gallery
Additional documents and videos
Additional links and references
Link | Description |
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Supplementary Information
Edit Supplementary Information