Case study:Restoring the River Doquette to its original bed

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Location: 48° 55' 23.07" N, 1° 14' 35.20" W

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Project overview

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Status	Complete
Project web site
Themes
Country	France
Main contact forename	Fabien
Main contact surname	Goulmy
Main contact user ID
Contact organisation	Fédération de la Manche pour la pêche et la protection du milieu aquatique
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	Seine-Normandie
River basin	sienne

Subcatchment

River name	Doquette
Area category
Area (km2)
Maximum altitude category
Maximum altitude (m)
Dominant geology
Ecoregion	Western Plains
Dominant land cover	agriculture, forest
Waterbody ID

Site

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Name	Percy
WFD water body codes	I70490000
WFD (national) typology
WFD water body name
Pre-project morphology	Straight
Reference morphology	Single channel, 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, Groundwater
Dominant substrate	Gravel
River corridor land use	Intensive agriculture
Average bankfull channel width category	2 - 5 m
Average bankfull channel width (m)	2.22.2 m <br />0.0022 km <br />220 cm <br />
Average bankfull channel depth category
Average bankfull channel depth (m)
Mean discharge category
Mean annual discharge (m3/s)	0.050.05 m³/s <br />50 l/s <br />
Average channel gradient category
Average channel gradient	0.0011
Average unit stream power (W/m2)	0.2451750.245 W/m² <br />

Project background

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Reach length directly affected (m)	240 m0.24 km <br />24,000 cm <br />
Project started
Works started	2008/10/01
Works completed	2008/10/01
Project completed
Total cost category	Less than 10 k€"Less than 10 k€" is not in the list (Less than 1 k€, 1 - 10 k€, 10 - 50 k€, 50 - 100 k€, 100 - 500 k€, 500 - 1000 k€, 1000 - 5000 k€, 5000 - 10000 k€, more than 10000 k€) of allowed values for the "Total cost category" property.
Total cost (k€)	9 k€9,000 € <br />
Benefit to cost ratio
Funding sources	Water Agency, Regional Council, Fédération de la Manche pour la pêche et la protection du milieu aquatique

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	1 - 10 k€	9 k€9,000 € <br />	Fédération de la Manche pour la pêche et la protection du milieu aquatique
Post-project management and maintenance
Monitoring

Reasons for river restoration

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

Measures

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Structural measures
Bank/bed modifications	Introducing sediment
Floodplain / River corridor
Planform / Channel pattern	Re-instatement of old course, Re-instatement of sinuosity
Other
Non-structural measures
Management interventions	Promoting riparian vegetation
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

Element	When monitored		Type of monitoring		Control site used	Result
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Physico-chemical quality elements

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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

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

Monitoring documents

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Image gallery

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Additional links and references

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Link	Description

Supplementary Information

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