Case study:Fluvial river restoration of Tordera in Tordera

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Location: 41° 42' 16.93" N, 2° 42' 55.07" E

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Project overview

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Status	Complete
Project web site
Themes	Habitat and biodiversity, Hydromorphology, Land use management - agriculture
Country	Spain
Main contact forename	ACA
Main contact surname	ACA
Main contact user ID
Contact organisation	ACA
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Parent multi-site project
This is a parent project encompassing the following projects	No

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Tordera River as it passes through the town of Tordera has lost the dynamism that was a few years ago, leaving behind an oxbow on the left. The main objectives are improve lateral and longitudinal connectivity, both hydrological and biological, improving the diversity of habitats in the river system, restore riparian plant communities and minimize flood risk .

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Aerial view of the restoration area in 1956

Aerial view of the restoration area

Meander before works

Meander after works

Meander before works

Meander after works

May 2008 flood

Removal of a longitudinal riprap

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 Tordera Subcatchment River name Tordera Area category Area (km2) Maximum altitude category Less than 100 m Maximum altitude (m) 25 m0.025 km <br />2,500 cm <br /> Dominant geology Ecoregion Ibero-Macaronesian Dominant land cover Urban Waterbody ID Other case studies in this subcatchment: Fluvial river restoration of Tordera in Sant Celoni, Sustainable management, at local level, of the alluvial aquifer of the River Tordera, through the reuse of waste water Site Edit site Name Río Tordera en Tordera 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 10 - 50 m Average bankfull channel width (m) Average bankfull channel depth category Less than 0.5 m Average bankfull channel depth (m) Mean discharge category Mean annual discharge (m3/s) 5.015.01 m³/s <br />5,010 l/s <br /> Average channel gradient category Average channel gradient Average unit stream power (W/m2) Project background Edit project background Reach length directly affected (m) 75 m0.075 km <br />7,500 cm <br /> Project started Works started Works completed Project completed Total cost category Total cost (k€) Benefit to cost ratio Funding sources ACA 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 Edit reasons for restoration Mitigation of a pressure Hydromorphology Channel pattern/planform, Width & depth variation Biology Physico-chemical Other reasons for the project Landscape enhancement Measures Edit Measures Structural measures Bank/bed modifications Floodplain / River corridor New habitats construction Planform / Channel pattern Re-instatement of old course, Artificial wall removal 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