Case study:Fluvial improvement in Riera de Caldés

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Location: 41° 34' 17.07" N, 2° 10' 29.82" E

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Project overview

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Status	Complete
Project web site
Themes
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
This is a parent project encompassing the following projects	No

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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.

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	Besós

Subcatchment

River name	Riera de Caldés
Area category
Area (km2)	1038 km²103,800 ha <br />
Maximum altitude category
Maximum altitude (m)	120 m0.12 km <br />12,000 cm <br />
Dominant geology
Ecoregion	Ibero-Macaronesian
Dominant land cover	Urban
Waterbody ID

Site

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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

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Reach length directly affected (m)	5900 m5.9 km <br />590,000 cm <br />
Project started	2009/03/01
Works started
Works completed	2009/11/01
Project completed
Total cost category
Total cost (k€)	117 k€117,000 € <br />
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

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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

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Structural measures
Bank/bed modifications	Removal of rip-rap elements, New bioengineering elements in order to stabilize slope banks
Floodplain / River corridor	Riparian tree planting, Removal of exotic plants (Arundo donax, Cortadelia seollana…)
Planform / Channel pattern
Other
Non-structural measures
Management interventions
Social measures (incl. engagement)
Other

Monitoring

Hydromorphological quality elements

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quality elements

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

Biological quality elements

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quality elements

Element	When monitored		Type of monitoring		Control site used	Result
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Physico-chemical quality elements

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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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Image gallery

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Map of the restoration area

Photos of the area before works

Photos of the area before works

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Photos of the area during works

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Photos of the area after works

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Photos of the area after works

Additional documents and videos

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Additional documentation (in Spanish)

Additional links and references

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Link	Description

Supplementary Information

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