Case study:Eden Crayfish Restoration Project

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Location: 54° 44' 25.72" N, 2° 45' 17.36" W

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Project overview

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Status	In progress
Project web site
Themes	Economic aspects, Habitat and biodiversity, Social benefits, Water quality
Country	England
Main contact forename	Joanne
Main contact surname	Backshall
Main contact user ID
Contact organisation	Eden River Trust
Contact organisation web site	http://www.edenriverstrust.org.uk/
Partner organisations	Defra, Environment Agency
Parent multi-site project
This is a parent project encompassing the following projects	No

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Project summary

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This project will improve the habitat and water quality of rivers within the Eden catchment in Cumbria. The River Eden is of international importance for its wildlife and is designated as a Special Area of Conservation (SAC). It sup-ports many significant species including white-clawed crayfish, salmon, trout, eel, bullhead, lamprey, otter, water vole, invertebrates of river shingle and water crowfoot. The Eden is the best remaining stronghold of the endan-gered white-clawed crayfish, which is threatened and declining across the UK and Western Europe. The Eden catchment comprises 98 water bodies. Under the Water Framework Directive (WFD) classification 59% of these fail to achieve Good Ecological Status and none of them are in “high” condition. Problems within the Eden are due to agriculture, sewage, septic tanks, urbanisation, invasive species and poor quality habitats along and within rivers. The project will restore more natural features in and around rivers and reduce the impact of diffuse pollution arising from agriculture. It aims to protect and expand populations of white-clawed crayfish as well as those of other valued river species.

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Eden Catchment - ecological status

Crayfish

Catchment and subcatchment Select a catchment/subcatchment Edit the catchment and subcatchment details (affects all case studies in this subcatchment) Site Edit site Name Rivers Leith, Lyvennet, Lowther, Hoff and Helm Becks, Croglin Water and Hayber Beck WFD water body codes WFD (national) typology WFD water body name Pre-project morphology Reference morphology Desired post project morphology Heavily modified water body No National/international site designation EU - Special Area of Conservation Local/regional site designations Protected species present No Invasive species present Yes Species of interest Dominant hydrology Dominant substrate River corridor land use Intensive agriculture (arable) 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) Project started Works started Works completed Project completed Total cost category 500 - 1000 k€ Total cost (k€) 550550 k€ <br />550,000 € <br /> Benefit to cost ratio Funding sources Defra 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 Agriculture, Urbanisation, Sewage, Invasive species Hydromorphology Biology Physico-chemical Other reasons for the project Measures Edit Measures Structural measures Bank/bed modifications Floodplain / River corridor Planting, Installing riverside fencing Planform / Channel pattern Other producing 20 farm assessments in areas of crayfish populations, carrying out improvement work on 20 farms to reduce diffuse pollution; carrying out instream habitat improvements at 5 locations. Non-structural measures Management interventions Social measures (incl. engagement) Other There will be a greater under-standing and stewardship of the river environment amongst farmers and other land owners, volunteers and the general public. 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