Case study:Harrow Lodge Park

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Location: 51° 33' 40", 0° 12' 37"
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Project overview

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Status Planned
Project web site
Themes Fisheries, Habitat and biodiversity
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
The Ravensbourne before restoration

Project summary

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Flood plain restoration is progressing (NGR: TQ5283586428).
Proposed works:
- Deculverting at downstream end at lakes, removing concrete
- Removal of lido steps
The Ravensbourne has been heavily modified, the downstream section deculverted. It runs through the middle of the park and is the main feature. It’s currently an eyesore and parts of it provide very little habitat for wildlife. The project is listed on the Green Grid list. The GLA support this project and contributed to the funding for the scoping report.

Monitoring surveys and results

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Lessons learnt

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Catchment and subcatchment

Catchment

River basin district Thames
River basin Roding, Beam and Ingrebourne

Subcatchment

River name Rom / Beam (from Ravensbourne confluence to Thames)
Area category Less than 10 km²
Area (km2)
Maximum altitude category Less than 100 m
Maximum altitude (m) 18
18 m
0.018 km
1,800 cm
Dominant geology Calcareous
Ecoregion Great Britain
Dominant land cover Suburban
Waterbody ID GB106037028100



Other case studies in this subcatchment: Dagenham Washlands Phase 2, Haynes Park


Site

Name
WFD water body codes GB106037028100
WFD (national) typology
WFD water body name Rom / Beam (from Ravensbourne confluence to Thames)
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

Reach length directly affected (m) 820 m
0.82 km
82,000 cm
Project started 2008/01/01
Works started
Works completed
Project completed
Total cost category
Total cost (k€)
Benefit to cost ratio
Funding sources Green Grid

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
Hydromorphology Channel pattern/planform, Width & depth variation
Biology
Physico-chemical
Other reasons for the project


Measures

Structural measures
Bank/bed modifications Deculverting, Removing of concrete structures
Floodplain / River corridor
Planform / Channel pattern
Other
Non-structural measures
Management interventions
Social measures (incl. engagement)
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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