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
Country	Spain
Main contact forename	ACA
Main contact surname	ACA
Main contact user ID
Contact organisation	ACA
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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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 .

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	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

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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

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Reach length directly affected (m)	75 m0.075 km <br />7,500 cm <br />
Project started
Works started
Works completed
Project completed
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Total cost (k€)
Benefit to cost ratio
Funding sources	ACA

Cost for project phases

Reasons for river restoration

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Mitigation of a pressure
Hydromorphology	Channel pattern/planform, Width & depth variation
Biology
Physico-chemical
Other reasons for the project	Landscape enhancement

Measures

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Structural measures
Bank/bed modifications
Floodplain / River corridor	New habitats construction
Planform / Channel pattern	Re-instatement of old course, Artificial wall removal
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Non-structural measures
Management interventions
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