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

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Location: 47° 15' 11", 5° 9' 34"
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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


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.
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Catchment and subcatchment

Catchment

River basin district Rhône - Méditerranée
River basin Rhône-Mediterranean

Subcatchment

River name Ouche
Area category
Area (km2) 916
916 km²
91,600 ha
Maximum altitude category
Maximum altitude (m)
Dominant geology
Ecoregion Western Highlands
Dominant land cover Intensive agriculture (arable)
Waterbody ID



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) 25
25 m
0.025 km
2,500 cm
Average bankfull channel depth category
Average bankfull channel depth (m)
Mean discharge category
Mean annual discharge (m3/s) 68
68 m³/s
68,000 l/s
Average channel gradient category
Average channel gradient 0.13
Average unit stream power (W/m2) 3467.7552
3,467.755 W/m²


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€) 49
49 k€
49,000 €
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 49
49 k€
49,000 €
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

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

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

Element When monitored Type of monitoring Control site used Result
Before measures After measures Qualitative Quantitative

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

Element When monitored Type of monitoring Control site used Result
Before measures After measures Qualitative Quantitative

Any other monitoring, e.g. social, economic

Element When monitored Type of monitoring Control site used Result
Before measures After measures Qualitative Quantitative


Monitoring documents



Additional documents and videos


Additional links and references

Link Description
http://http://ouche.fr/

Supplementary Information

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