Case study:Marsh restoration on the Merlue

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Location: none specified

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Project overview

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Status	Complete
Project web site
Themes	Habitat and biodiversity
Country	France
Main contact forename	Eric
Main contact surname	Chaput
Main contact user ID
Contact organisation	Association pour le développement et l’animation de la Petite Montagne
Contact organisation web site
Partner organisations
This is a parent project encompassing the following projects	No

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Project summary

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Monitoring surveys and results

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Lessons learnt

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Catchment and subcatchment

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Catchment

River basin district	Rhône - Méditerranée
River basin

Subcatchment

River name	Hake
Area category	10 - 100 km²
Area (km2)	15 km²1,500 ha <br />
Maximum altitude category	200 - 500 m
Maximum altitude (m)
Dominant geology	Siliceous
Ecoregion	Western Highlands
Dominant land cover
Waterbody ID

Site

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Name	Merlue
WFD water body codes	FRDR493a
WFD (national) typology
WFD water body name
Pre-project morphology	Single channel, Straight
Reference morphology	Single channel, Sinuous, Pool-riffle
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	Groundwater
Dominant substrate	Cobble, Gravel
River corridor land use
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)	11 m³/s <br />1,000 l/s <br />
Average channel gradient category
Average channel gradient
Average unit stream power (W/m2)

Project background

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Reach length directly affected (m)	1450 m1.45 km <br />145,000 cm <br />
Project started	2008/07/01
Works started	2008/07/01
Works completed	2008/09/01
Project completed
Total cost category	100 - 500 k€
Total cost (k€)	136 k€136,000 € <br />
Benefit to cost ratio
Funding sources	LIFE Streams

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

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Mitigation of a pressure
Hydromorphology	Structure & condition of riparian zones, Width & depth variation
Biology
Physico-chemical
Other reasons for the project

Measures

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Structural measures
Bank/bed modifications	Increase in bed width
Floodplain / River corridor	Restoration of riparian marshes
Planform / Channel pattern
Other
Non-structural measures
Management interventions
Social measures (incl. engagement)
Other

Monitoring

Hydromorphological quality elements

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quality elements

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

Biological quality elements

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quality elements

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Physico-chemical quality elements

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quality elements

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Any other monitoring, e.g. social, economic

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Monitoring documents

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Image gallery

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Additional links and references

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Supplementary Information

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