Case study:River restoration project of the stream of Vallvidrera

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Location: 41° 26' 17.37" N, 2° 4' 11.31" E

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Project overview

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Status	Complete
Project web site
Themes
Country	Spain
Main contact forename	Naturalea S.L.
Main contact surname	Naturalea S.L.
Main contact user ID
Contact organisation	Naturalea S.L.
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 action described is part of a more extensive project that aims the complete restoration of the stream of Vallvidrera with the objective to improve the ecological quality of this stream. The specific objectives of this project are: To improve the structure and diversity of plant communities, ensure the stability of margins minimize the erosive effects, eliminate bottleneck in the bed that may affect adjacent spaces during floods, increasing the capacity of self-purification of the stream. The project has a total budget of 37.164,74 € and is financed by Collserola Park Consortium.

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	Pirineo Oriental
River basin	Llobregat

Subcatchment

River name	Riera de Vallvidrera
Area category
Area (km2)
Maximum altitude category	100 - 200 m
Maximum altitude (m)	145 m0.145 km <br />14,500 cm <br />
Dominant geology
Ecoregion	Ibero-Macaronesian
Dominant land cover
Waterbody ID

Site

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Name	Riera de Vallvidrera en el término municipal de Sant Cugat
WFD water body codes
WFD (national) typology
WFD water body name
Pre-project morphology	Sinuous
Reference morphology	Sinuous
Desired post project morphology
Heavily modified water body
National/international site designation
Local/regional site designations
Protected species present
Invasive species present
Species of interest
Dominant hydrology
Dominant substrate
River corridor land use
Average bankfull channel width category	2 - 5 m
Average bankfull channel width (m)	22 m <br />0.002 km <br />200 cm <br />
Average bankfull channel depth category
Average bankfull channel depth (m)
Mean discharge category
Mean annual discharge (m3/s)
Average channel gradient category
Average channel gradient
Average unit stream power (W/m2)

Project background

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Reach length directly affected (m)	414 m0.414 km <br />41,400 cm <br />
Project started	2010/08/01
Works started
Works completed	2010/09/01
Project completed
Total cost category	10 - 50 k€
Total cost (k€)	37 k€37,000 € <br />
Benefit to cost ratio
Funding sources	Collserola Park Consortium

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			Naturalea, S.L.
Post-project management and maintenance
Monitoring

Reasons for river restoration

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Mitigation of a pressure
Hydromorphology	Channel pattern/planform, Structure & condition of riparian zones
Biology
Physico-chemical
Other reasons for the project

Measures

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Structural measures
Bank/bed modifications	New bioengineering elements in order to stabilize slope banks
Floodplain / River corridor	Removal of exotic plants, Riparian vegetation improvement
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

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 documentation (in Spanish)

Additional links and references

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Link	Description

Supplementary Information

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