Case study:Agreed definition of mobility area for the Adour

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Location: 43° 39' 8.51" N, 0° 0' 51.13" W

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Project overview

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Status	In progress
Project web site
Themes
Country	France
Main contact forename	Fréderic
Main contact surname	Ré
Main contact user ID
Contact organisation	Institution Adour
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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Monitoring surveys and results

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Lessons learnt

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Catchment and subcatchment

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(affects all case studies in this subcatchment)

Catchment

River basin district	Hautes-Pyrénées et Ger
River basin	Adour - Garonne

Subcatchment

River name	L'Adour
Area category	more than 10000 km²
Area (km2)	17000 km²1,700,000 ha <br />
Maximum altitude category
Maximum altitude (m)
Dominant geology
Ecoregion	Western Plains
Dominant land cover	Intensive agriculture
Waterbody ID

Site

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Name	Hautes-Pyrénées et Ger
WFD water body codes	FRFR327C
WFD (national) typology
WFD water body name
Pre-project morphology	Braided, Entrenched, Embanked
Reference morphology	Braided
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
Dominant substrate	Gravel
River corridor land use	Intensive agriculture, Urban
Average bankfull channel width category	10 - 50 m
Average bankfull channel width (m)	2020 m <br />0.02 km <br />2,000 cm <br />
Average bankfull channel depth category
Average bankfull channel depth (m)
Mean discharge category
Mean annual discharge (m3/s)	3535 m³/s <br />35,000 l/s <br />
Average channel gradient category
Average channel gradient	0.002
Average unit stream power (W/m2)	34.324534.325 W/m² <br />

Project background

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Reach length directly affected (m)	44000 m44 km <br />4,400,000 cm <br />
Project started	2005/01/01
Works started	2008/01/01
Works completed	2018/01/01
Project completed
Total cost category	1000 - 5000 k€
Total cost (k€)	3733 k€3,733,000 € <br />
Benefit to cost ratio
Funding sources	Water Agency, Institution Adour, Regional Council, French State

Cost for project phases

Phase	cost category	cost exact (k€)	Lead organisation	Contact forename	Contact surname
Investigation and design	100 - 500 k€	130 k€130,000 € <br />
Stakeholder engagement and communication	50 - 100 k€	55 k€55,000 € <br />
Works and works supervision	1000 - 5000 k€	2580 k€2,580,000 € <br />	Water Agency
Post-project management and maintenance
Monitoring	100 - 500 k€	130 k€130,000 € <br />

Reasons for river restoration

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Mitigation of a pressure	Flood defence, Abstraction, Aggregate/mineral extraction
Hydromorphology	Width & depth variation, Flow velocities, Structure & condition of riparian zones
Biology
Physico-chemical
Other reasons for the project	Flood risk management, Stop riverbed incision and groundwater table lowering

Measures

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Structural measures
Bank/bed modifications	Removal/retreat of bank protection
Floodplain / River corridor	Restoration of riparian forest
Planform / Channel pattern
Other
Non-structural measures
Management interventions	Definition of erodble corridor
Social measures (incl. engagement)
Other	Consultation

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
Channel pattern/planform	Yes

Biological quality elements

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quality elements

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

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 documents and videos

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Additional links and references

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Link	Description

Supplementary Information

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