Case study:Fluvial river restoration of Tordera in Tordera

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Location: 41° 42' 17", 2° 42' 55"
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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
Contact organisation web site
Partner organisations
Parent multi-site project
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encompassing the following
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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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Image gallery


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
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Catchment and 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 m
0.025 km
2,500 cm
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

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) 5.01
5.01 m³/s
5,010 l/s
Average channel gradient category
Average channel gradient
Average unit stream power (W/m2)


Project background

Reach length directly affected (m) 75 m
0.075 km
7,500 cm
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

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


Measures

Structural measures
Bank/bed modifications
Floodplain / River corridor Habitat creation
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

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

Biological quality elements

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

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

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


Monitoring documents



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Additional links and references

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Supplementary Information

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