Case study:Restoration project of the river area of the streams of Vallmanya and Reixac

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Location: 41° 41' 26", 2° 44' 7"
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Project overview

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Status Complete
Project web site
Themes Environmental flows and water resources, 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
Partner organisations
Parent multi-site project
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Project summary

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The areas to be restored are the streams of Vallmanya and Reixac until their union and later mouth in the Tordera. Both streams are under strong human pressure but the more degraded is the Reixac, since the upper reaches of the stream of Vallmanya is in a good condition and reflects the potential of the area as a biological corridor. The main objectives of the project are to promote the natural dynamics of the ecological improvement (removing non-native vegetation and enhance the richness, biodiversity and riparian degree of coverage area), improve the hydraulic conditions of the streams and increase the landscape value of the site. The project has a total budget of 413.420,91 € and is financed by Inditex Group, S.L.

Monitoring surveys and results

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Lessons learnt

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Image gallery


Map of the restoration area
Map of the restoration area
Photos of the area before works
Photos of the area before works
Photos of the area before works
Photos of the works
Photos of the works
Photos of the works
Photos of the works
Photos of the works
Photos of the works
Photos of the area after works
Photos of the area after works
Photos of the area after works
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Catchment and subcatchment

Subcatchment:Riera de Reixac


Site

Name Riera de Reixac
WFD water body codes
WFD (national) typology
WFD water body name
Pre-project morphology
Reference morphology
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) 12
12 m
0.012 km
1,200 cm
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

Reach length directly affected (m) 907 m
0.907 km
90,700 cm
Project started 2008/12/01
Works started
Works completed 2009/02/01
Project completed
Total cost category 100 - 500 k€
Total cost (k€) 413 k€
413,000 €
Benefit to cost ratio
Funding sources Inditex Group S.L.

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

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 New bioengineering elements in order to stabilize slope banks, Revetmens with local species
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

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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