Case study:River Pool Linear Park Enhacement

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Location: 51° 26' 0.81" N, 0° 1' 42.12" W

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Project overview

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Status	Complete
Project web site
Themes	Fisheries, Habitat and biodiversity
Country	England
Main contact forename	Vic
Main contact surname	Richardson
Main contact user ID
Contact organisation	Thames21
Contact organisation web site	http://www.thames21.org.uk/
Partner organisations	River Restoration Centre, Environment Agency
Parent multi-site project
This is a parent project encompassing the following projects	No

River Pool mid-restoration, April 2012

Project summary

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This section of the River Pool was featureless with very little marginal vegetation. The channel was overshadowed and habitat for fish and invertebrates was limited. In a built up borough of London, the river is flashy and the aim was to design works that would account for this, while improving the in-stream condition and the wider river corridor. This was achieved through the creation of berms on alternating banks, created using wood felled on-site. The berms were positioned in a manner to encourage the creation of pool and riffle sequences to further diversify flow conditions.

The works were built entirely by volunteers, organised through the Thames21 project. The empowerment of local volunteers fosters understanding, and long-term, there is a greater aspiration to re-visit and maintain the works. Additionally, the use of volunteers and on-site materials kept costs very low, with the whole project costing in the region of £500 (€625).

series of berms on alternating banks along a section of 300m constructed from site-won wood felled along this section

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Image gallery

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The restored river, complete with berms. April 2012

Use of willow to create berm. April 2012

Group of Thames21 volunteers in action. April 2012

Volunteer creating one of the berms. April 2012

Created berm, filled with spoil. April 2012

Catchment and subcatchment Select a catchment/subcatchment Edit the catchment and subcatchment details (affects all case studies in this subcatchment) Catchment River basin district Thames River basin Roding, Beam and Ingrebourne Subcatchment River name Ravensbourne Area category 10 - 100 km² Area (km2) Maximum altitude category Less than 100 m Maximum altitude (m) 8888 m <br />0.088 km <br />8,800 cm <br /> Dominant geology Calcareous Ecoregion Great Britain Dominant land cover Suburban Waterbody ID GB106037028110 Other case studies in this subcatchment: ERCIP - European River Corridor Improvement Plans, The River Ravensbourne (submission for UK Rivers Prize 2016 Site Edit site Name River Pool WFD water body codes GB106039023250 WFD (national) typology WFD water body name Pool River 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 Edit project background Reach length directly affected (m) 300 m0.3 km <br />30,000 cm <br /> Project started 2011/11/01 Works started Works completed Project completed 2012/05/31 Total cost category Less than 1 k€ Total cost (k€) 0.6 k€600 € <br /> 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 Less than 1 k€ 00 k€ <br />0 € <br /> Thames21 Works and works supervision Less than 1 k€ 00 k€ <br />0 € <br /> Thames21 Post-project management and maintenance Monitoring Supplementary funding information A very low cost project thanks to: - The Environment Agency provided the spoil used in the project from a nearby site (free of charge). - Free voluntary labour - Site-sourced tree material Reasons for river restoration Edit reasons for restoration Mitigation of a pressure Hydromorphology Quantity & dynamics of flow Biology Fish: Abundance Physico-chemical Other reasons for the project Improving a local park Measures Edit Measures Structural measures Bank/bed modifications Creation of berms Floodplain / River corridor Planform / Channel pattern Other Non-structural measures Management interventions Social measures (incl. engagement) Other Participation in works, Participation in maintenance Monitoring Hydromorphological quality elements Edit Hydromorphological quality elements Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Biological quality elements Edit biological quality elements Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Physico-chemical quality elements Edit 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 Edit Other responses Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Monitoring documents Upload monitoring documents Additional documents and videos Upload additional documents Additional links and references Edit links and references Link Description http://www.therrc.co.uk/case studies/river%20pool%20case%20study.pdf River Restoration Centre Case Study Supplementary Information Edit Supplementary Information Thames21 website for more information on their work: www.thames21.org.uk