Case study:Reconnection of a secondary arm of the Rhine: the Schafteu

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Location: 48° 19' 7.58" N, 7° 42' 16.44" E

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Project overview

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Status	Complete
Project web site
Themes	Land use management - forestry, Hydromorphology, Flood risk management
Country	France
Main contact forename	Erwan
Main contact surname	Hornier
Main contact user ID
Contact organisation	Office national de l’eau et des milieux aquatiques
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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 Rhin-Meuse River basin Alsace; Rhinau Subcatchment River name Schafteu Area category 100 - 1000 km² Area (km2) Maximum altitude category 200 - 500 m Maximum altitude (m) Dominant geology Siliceous Ecoregion Western Plains Dominant land cover Extensive agriculture, Grassland Waterbody ID Site Edit site Name Schafteu WFD water body codes FRCR2 WFD (national) typology WFD water body name Pre-project morphology Single channel, Straight, High width:depth Reference morphology Single channel, Side Channels, Sinuous 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, Artificially regulated Dominant substrate River corridor land use Extensive agriculture, Grassland Average bankfull channel width category 2 - 5 m Average bankfull channel width (m) 33 m <br />0.003 km <br />300 cm <br /> Average bankfull channel depth category 0.5 - 2 m Average bankfull channel depth (m) Mean discharge category Mean annual discharge (m3/s) 22 m³/s <br />2,000 l/s <br /> Average channel gradient category Average channel gradient 0.1 Average unit stream power (W/m2) 653.8653.8 W/m² <br /> Project background Edit project background Reach length directly affected (m) 7500 m7.5 km <br />750,000 cm <br /> Project started 2004/02/01 Works started 2004/02/01 Works completed 2005/01/01 Project completed Total cost category 500 - 1000 k€ Total cost (k€) 741 k€741,000 € <br /> Benefit to cost ratio Funding sources European Union, Ministry for the Environment 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 Quantity & dynamics of flow, Flow velocities Biology Physico-chemical Other reasons for the project Bank erosion, Potential recreation, Flood risk management Measures Edit Measures Structural measures Bank/bed modifications Lowering of dike, Removal of obstructions to flow, Introducing large woody debris Floodplain / River corridor Planform / Channel pattern Flooding of small islands, Re-instatement of old course 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 Quantity & dynamics of flow Yes Yes Yes Improvement Flow velocities Yes Yes Yes Improvement 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