Case study:Morden Hall Park Water Vole Habitat Enhancement

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Location: 51° 23' 52.10" N, 0° 11' 3.91" W

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Project overview

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Status	Complete
Project web site
Themes	Habitat and biodiversity
Country	England
Main contact forename	Chris
Main contact surname	Strachan
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

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Project summary

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The objective is to create natural banks that water voles can occupy through the removal of wooden toe-boarding.
Toe-boarding was removed from 500m of bank. Where there was a liklihood of bank collapse, on bends and around small islands, the boards were either left or a sympathetic replacement such as coir matting was used. Morden Hall Park is a former deer park currently owned by the National Trust. The river Wandle and several man-made channels flow through the park, the banks of which are protected by wooden toe-boarding. Water voles are currently absent on the river and there are future plans to re-introduce them at this site.
The project is part of the London Water Vole Project.

Monitoring surveys and results

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Lessons learnt

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The banks remained fairly stable where the boards had been removed. Any slumping or collapse will be left to allow the formation of natural features. Future planting of emergent vegetation types may be needed to enhance the marginal habitat.

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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 London Subcatchment River name Wandle (Croydon to Wandsworth) and the R. Gravney Area category 100 - 1000 km² Area (km2) Maximum altitude category 200 - 500 m Maximum altitude (m) 282282 m <br />0.282 km <br />28,200 cm <br /> Dominant geology Calcareous Ecoregion Great Britain Dominant land cover Suburban Waterbody ID GB106039023460 Other case studies in this subcatchment: Beddington Park, Beddington Park Enhancements, Boulder Pool and Plough Lane, Durand Close, EDF Weir removal, Eel Pass over tilting weir at Ravensbury Park, Garratt Park, Hackbridge Restoration, Hackbridge weir notch, King Georges Park... further results Site Edit site Name WFD water body codes GB106039023460 WFD (national) typology WFD water body name Wandle (Croydon to Wandsworth) and the R. Gravney 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) 750 m0.75 km <br />75,000 cm <br /> Project started 2008/01/01 Works started Works completed 2009/01/01 Project completed Total cost category 50 - 100 k€ 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 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 Riparian development Hydromorphology Biology Vertebrates Physico-chemical Other reasons for the project Measures Edit Measures Structural measures Bank/bed modifications Bank reprofiling, Toeboard removal Floodplain / River corridor Planform / Channel pattern 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