Case study:Fluvial improvement in Riera de Caldés

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Location: 41° 34' 17", 2° 10' 30"
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Project overview

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Status Complete
Project web site
Themes Environmental flows and water resources, Hydromorphology, Water quality
Country Spain
Main contact forename Naturalea
Main contact surname Naturalea
Main contact user ID
Contact organisation Naturalea Conservació, S.L.
Contact organisation web site
Partner organisations
Parent multi-site project
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Project summary

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The Caldés is an arroyo located in NE of Spain, in the Besos' Basin. The work area is located in the village of Palau-solitá, near Barcelona. The reach has a length of 5.900 meters and about 34,5 has. As the work area is an urban space, it's important for the local population the accessibility and programs to bring to the attention of the people. The project of fluvial improvement is aimed to develop and increase the riparian communities in order to ameliorate water quality. There also are local problems that are necessary to solve: local impacts, banks erosion, rip-raps that are obsoletes... One of the main objectives is to improve the quality of the fluvial landscape. The project includes removal of exotic plants (Arundo donax, Cortadelia seollana…); riparian tree planting with non exotic plants; creation of new habitats for amphibian communities. New bio-engineering techniques are used to develop and help these riparian communities. The works started in March 2009 and finished in November 2009. All the works were carried out by Natualea Conservació, S.L., a local enterprise.

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Lessons learnt

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Image gallery


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 area during works
Photos of the area during works
Photos of the area during works
Photos of the area during works
Photos of the area during works
Photos of the area during 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

Catchment

River basin district Pirineo Oriental
River basin Besós

Subcatchment

River name Riera de Caldés
Area category
Area (km2) 1038 km²
103,800 ha
Maximum altitude category
Maximum altitude (m) 120 m
0.12 km
12,000 cm
Dominant geology
Ecoregion Ibero-Macaronesian
Dominant land cover Urban
Waterbody ID



Site

Name
WFD water body codes
WFD (national) typology
WFD water body name
Pre-project morphology Embanked
Reference morphology
Desired post project morphology
Heavily modified water body true
National/international site designation
Local/regional site designations
Protected species present
Invasive species present
Species of interest
Dominant hydrology Ephemeral
Dominant substrate
River corridor land use Urban
Average bankfull channel width category 10 - 50 m
Average bankfull channel width (m)
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) 5900 m
5.9 km
590,000 cm
Project started 2009/03/01
Works started
Works completed 2009/11/01
Project completed
Total cost category
Total cost (k€) 117 k€
117,000 €
Benefit to cost ratio
Funding sources Ajuntament de Palau-Solità i Plegamans

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 Conservació, S.L.
Post-project management and maintenance
Monitoring



Reasons for river restoration

Mitigation of a pressure Riparian development
Hydromorphology Channel pattern/planform, Structure & condition of riparian zones
Biology
Physico-chemical
Other reasons for the project Landscape enhancement


Measures

Structural measures
Bank/bed modifications Removal of rip-rap, New bioengineering elements in order to stabilize slope banks
Floodplain / River corridor Riparian planting, Removal of exotic plants
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

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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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