Case study:Restoration of the longitudinal continuity along the Canche and its classified tributaries

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Status	Complete
Project web site
Themes	Habitat and biodiversity, Monitoring, Water quality
Country	France
Main contact forename	Herve
Main contact surname	Regniez
Main contact user ID
Contact organisation	Syndicat mixte pour le SAGE de la Canche
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This is a parent project encompassing the following projects	No

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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 Canche River basin Artois-Picardie Subcatchment River name Canche Area category 1000 - 10000 km² Area (km2) Maximum altitude category 100 - 200 m Maximum altitude (m) Dominant geology Siliceous Ecoregion Western Plains Dominant land cover Extensive agriculture, Grassland, Woodland Waterbody ID Site Edit site Name Canche WFD water body codes FRAR13 WFD (national) typology WFD water body name Pre-project morphology Single channel, Straight Reference morphology Single channel, Sinuous, Step-pool Desired post project morphology Heavily modified water body true National/international site designation Local/regional site designations Protected species present Invasive species present Species of interest Dominant hydrology Quick run-off, Groundwater Dominant substrate Gravel, Cobble River corridor land use Extensive agriculture, Woodland, Grassland Average bankfull channel width category 5 - 10 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) 1111 m³/s <br />11,000 l/s <br /> Average channel gradient category Average channel gradient 1.5 Average unit stream power (W/m2) Project background Edit project background Reach length directly affected (m) Project started 2006/01/01 Works started Works completed Project completed Total cost category 100 - 500 k€ Total cost (k€) 260 k€260,000 € <br /> Benefit to cost ratio Funding sources Water Agency, Department of fisheries, Syndicat mixte pour le SAGE de la Canche Cost for project phases Phase cost category cost exact (k€) Lead organisation Contact forename Contact surname Investigation and design Syndicat mixte pour le SAGE de la Canche Stakeholder engagement and communication Syndicat mixte pour le SAGE de la Canche Works and works supervision Syndicat mixte pour le SAGE de la Canche Post-project management and maintenance Syndicat mixte pour le SAGE de la Canche Monitoring Syndicat mixte pour le SAGE de la Canche Reasons for river restoration Edit reasons for restoration Mitigation of a pressure Hydromorphology Continuity for organisms, Continuity of sediment transport, Quantity & dynamics of flow, Flow velocities Biology Fish: Species composition, Fish: Abundance, Fish: Disturbance-sensitive species Physico-chemical Other reasons for the project Measures Edit Measures Structural measures Bank/bed modifications Removal of obstructions to flow Floodplain / River corridor Planform / Channel pattern Installation of fish pass 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 Fish: Species composition Yes Improvement Fish: Abundance Fish: Disturbance-sensitive species 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