Case study:Bleinheim Palace Project

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Location: 51° 52' 39.49" N, 1° 29' 42.45" W

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Project overview

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Status	Complete
Project web site
Themes	Habitat and biodiversity, Hydromorphology, Water quality
Country	England
Main contact forename	Nick
Main contact surname	Haycock
Main contact user ID
Contact organisation	Haycock Environmental Consultants
Contact organisation web site
Partner organisations	Amenity Water
Parent multi-site project
This is a parent project encompassing the following projects	No

River Evenlode, post restoration

Project summary

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Due to their loss of spawning and nursery sites, rheophilic fish populations (especially barbel, chub and dace) the river Evenlode faced significant recruitment problems. These problems originate in the widening and dredging of the channel leaving it over-sized, with few features to provide habitat or refuge for juvenile fish. With local angling club membership dwindling, the project aimed to increase fish populations in the river through the introduction of a more diverse flow and the allowance of more frequent flooding.

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Image gallery

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River Evenlode, May 2006

Created side bars, May 2006

Backwater (for high water flows), May 2006

Water access for lifestock, May 2006

Spit in river, May 2006

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 Cotswolds Subcatchment River name Evenlode (Bledington to Glyme confluence) Area category 100 - 1000 km² Area (km2) Maximum altitude category 200 - 500 m Maximum altitude (m) 213213 m <br />0.213 km <br />21,300 cm <br /> Dominant geology Calcareous Ecoregion Great Britain Dominant land cover Arable and Horticulture Waterbody ID GB106039029960 Site Edit site Name River Evenlode WFD water body codes GB106039029960 WFD (national) typology WFD water body name Evenlode (Bledington to Glyme confluence) Pre-project morphology High width:depth Reference morphology Sinuous, Pool-riffle Desired post project morphology Heavily modified water body Yes National/international site designation Local/regional site designations Protected species present No Invasive species present No Species of interest Dominant hydrology Quick run-off Dominant substrate Gravel, Sand, Cobble River corridor land use Extensive agriculture Average bankfull channel width category 10 - 50 m Average bankfull channel width (m) Average bankfull channel depth category 0.5 - 2 m Average bankfull channel depth (m) Mean discharge category Mean annual discharge (m3/s) 3.70 m3/s3,700 l/s <br /> Average channel gradient category Average channel gradient Average unit stream power (W/m2) Project background Edit project background Reach length directly affected (m) 2000 m2 km <br />200,000 cm <br /> Project started 2005/09/01 Works started Works completed 2006/03/01 Project completed Total cost category 100 - 500 k€ Total cost (k€) 140 k€140,000 € <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 Works and works supervision Post-project management and maintenance Monitoring Reasons for river restoration Edit reasons for restoration Mitigation of a pressure Hydromorphology Substrate conditions, Width & depth variation, Continuity of sediment transport, Flow velocities Biology Fish: Species composition, Fish: Abundance Physico-chemical Other reasons for the project Landscape enhancement, Recreation Measures Edit Measures Structural measures Bank/bed modifications Planting, Creation of pools and riffles, Introduction of spawning gravels Floodplain / River corridor Creation of backwaters Planform / Channel pattern Channel narrowing 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 http://www.therrc.co.uk/case studies/evenlode blenheimpalace.pdf River Restoration Centre Case Study Supplementary Information Edit Supplementary Information