Case study:Fishery/habitat enhancement on the Grand Union Canal

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Location: 51° 37' 1.72" N, 0° 29' 46.88" W

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Project overview

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Status	In progress
Project web site
Themes	Fisheries, Habitat and biodiversity
Country	England
Main contact forename	Stewart
Main contact surname	Pomeroy
Main contact user ID
Contact organisation	Groundwork London
Contact organisation web site
Partner organisations	British Waterways, Environment Agency, London Wildlife Trust, Angling Society
Parent multi-site project
This is a parent project encompassing the following projects	No

A new backwater

Project summary

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Creation of a backwater of variable depth and gentle sloping margins. enhancements for fishery and wildlife. Silted up, heavily shaded. Unused part of a farm adjacent to the canal.
Funding secured and commitment to deliver - August 2010 (LRAP update). Good replication potential.

Monitoring surveys and results

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Pre-project data

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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 Colne Subcatchment River name Colne and GUC (from confluence with Chess to Ash) Area category 100 - 1000 km² Area (km2) Maximum altitude category 100 - 200 m Maximum altitude (m) 181181 m <br />0.181 km <br />18,100 cm <br /> Dominant geology Calcareous Ecoregion Great Britain Dominant land cover Improved grassland Waterbody ID GB106039023090 Other case studies in this subcatchment: Colne Brook, Habitat Improvements on the River Colne at West Drayton, Uxbridge Moor Backwater Site Edit site Name WFD water body codes GB106039023090 WFD (national) typology WFD water body name Colne and GUC (from confluence with Chess to Ash) 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) 100 m0.1 km <br />10,000 cm <br /> Project started 2010/01/01 Works started Works completed 2014/03/01 Project completed Total cost category 10 - 50 k€ Total cost (k€) Benefit to cost ratio Funding sources Private Company 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 Edit reasons for restoration Mitigation of a pressure Hydromorphology Biology Fish Physico-chemical Other reasons for the project Measures Edit Measures Structural measures Bank/bed modifications Floodplain / River corridor Planform / Channel pattern Creation of backwater Other Non-structural measures Management interventions Social measures (incl. engagement) Other 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 Supplementary Information Edit Supplementary Information