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	Environmental flows and water resources, Flood risk management, Habitat and biodiversity, Hydromorphology
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
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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.

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Image gallery

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Map of the restoration area

Aerial view of the restoration area

Photos of the area before works

Photos of the area before works

Photos of the area before works

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Photos of the area during works

Photos of the area during works

Photos of the area after works

Catchment and subcatchment Select a catchment/subcatchment Edit the catchment and subcatchment details (affects all case studies in this subcatchment) 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 Edit site 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 Edit project background 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 Edit reasons for restoration Mitigation of a pressure Hydromorphology Channel pattern/planform, Structure & condition of riparian zones Biology Physico-chemical Other reasons for the project Measures Edit Measures Structural measures Bank/bed modifications New bioengineering elements in order to stabilize slope banks Floodplain / River corridor Removal of exotic plants, Restoring riparian vegetation Planform / Channel pattern Other Non-structural measures Management interventions Social measures (incl. engagement) Other Monitoring Hydromorphological quality elements Edit Hydromorphological quality elements Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Biological quality elements Edit biological quality elements Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Physico-chemical quality elements Edit 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 Edit Other responses Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Monitoring documents Upload monitoring documents Additional documents and videos Upload additional documents Additional documentation (in Spanish) Additional links and references Edit links and references Link Description Supplementary Information Edit Supplementary Information