Case study:Land acquisition on the banks of the Ouche River

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Location: 47° 15' 10.55" N, 5° 9' 34.07" E

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Project overview

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Status	Complete
Project web site
Themes	Environmental flows and water resources, Habitat and biodiversity, Land use management - agriculture, Spatial planning
Country	France
Main contact forename	Lisa
Main contact surname	Largeron
Main contact user ID
Contact organisation	Syndicat mixte d’étude et d’aménagement du bassin de l’Ouche et de ses affluents
Contact organisation web site
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 Ouche River is a 95 km long tributary of the Saône. His watershed, 916 km2, is predominantly agricultural. The river is channelized on several sectors in order to increase the flow velocities and prevent flooding risk. Many bank protection and dikes were put in place. Due to the river dynamic, it is necessary to consolidate and strengthen the bank protection regularly In 1992-1993, the General Council decided to take action to limit the interventions for banks protections strengthening. In 1995, a study identifies riparian areas that may be acquired. The sector concerned presents few facilities and dams already damaged by the dynamics of the river. 3.4 hectares of land on the right bank, corresponding to a band 50 m wide, are acquired. The bank protection are not deleted because they are already severely degraded by the flow dynamics. However, actions are taken to sensitize residents to the non-interventionist approach. Landowners are compensated.

Monitoring surveys and results

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This allows to increase the diversity of habitats. Some alluvial deposits were created and riparian vegetation has developed. The fish monitoring show a very important increase in the diversity of fish.

Lessons learnt

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Image gallery

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The Ouche River in 1995 in a portion where the river is calibrated, rectified and with banks protected.

The Ouche River in a rectified stretch where the flow dynamics is not active.

The Ouche River where the flow dynamics is active and where bank protection are not rebuilt.

Catchment and subcatchment Select a catchment/subcatchment Edit the catchment and subcatchment details (affects all case studies in this subcatchment) Catchment River basin district Rhône - Méditerranée River basin Rhône-Mediterranean Subcatchment River name Ouche Area category Area (km2) 916916 km² <br />91,600 ha <br /> Maximum altitude category Maximum altitude (m) Dominant geology Ecoregion Western Highlands Dominant land cover Intensive agriculture (arable) Waterbody ID Site Edit site Name Fauverney WFD water body codes FRDR646 WFD (national) typology WFD water body name Pre-project morphology Reinforced banks, Straightened Reference morphology Sinuous 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) 2525 m <br />0.025 km <br />2,500 cm <br /> Average bankfull channel depth category Average bankfull channel depth (m) Mean discharge category Mean annual discharge (m3/s) 6868 m³/s <br />68,000 l/s <br /> Average channel gradient category Average channel gradient 0.13 Average unit stream power (W/m2) 3467.75523,467.755 W/m² <br /> Project background Edit project background Reach length directly affected (m) Project started Works started 1998/06/01 Works completed 1998/06/30 Project completed Total cost category Total cost (k€) 4949 k€ <br />49,000 € <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 agence de l’eau, Office national de l’eau et des milieux aquatiques (Onema). Stakeholder engagement and communication 4949 k€ <br />49,000 € <br /> agence de l’eau, Office national de l’eau et des milieux aquatiques (Onema). Works and works supervision Post-project management and maintenance Monitoring Supplementary funding information Costs only include the acquisition of land. Reasons for river restoration Edit reasons for restoration Mitigation of a pressure Flood protection maintenance works Hydromorphology Quantity & dynamics of flow, Structure & condition of intertidal zone Biology Fish: Species composition, Fish: Abundance, Invertebrates Physico-chemical Other reasons for the project Measures Edit Measures Structural measures Bank/bed modifications Floodplain / River corridor Planform / Channel pattern Other Non-structural measures Management interventions land acquisition Social measures (incl. engagement) sensitization of the resident 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 Yes Yes No Yes No Improvement 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 Case study description by ONEMA (French National Agency for Water and Aquatic Environments) (in French) Additional links and references Edit links and references Link Description http://http://ouche.fr/ Supplementary Information Edit Supplementary Information