Case study:Llobregat river restoration

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Location: 41° 25' 56.52" N, 1° 59' 52.06" E

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Project overview

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Status	Complete
Project web site
Themes
Country	Spain
Main contact forename	Joan
Main contact surname	Feliú
Main contact user ID
Contact organisation	Acciónatura
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 river Llobregat lower course is the result of centuries of human activity. Historically it has tried to avoid overflows and maintain a constant channel in order to gain land for agriculture and to capture water for irrigation and industry. In recent years, construction of major infrastructures such as highway, the TGV and other service roads have come to narrow the river steadily reducing temporary floodplain. The important aspects are summarized in the following features: creating favorable conditions (morphological and hydraulic); stabilize the channel and enable the growth of vegetation compatible with the frequency of floods and flooding near the river; create riverside communities continue to function as a corridor; promote native species and eliminate the alien; recover the riparian habitat and all; lost and refuge areas for wildlife habitat; encourage and facilitate the enjoyment of the river by the population, with emphasis on landscape and ecological aspects and fen-it compatible with conservation.

Monitoring surveys and results

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Lessons learnt

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Catchment and subcatchment

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(affects all case studies in this subcatchment)

Catchment

River basin district	Pirineo Oriental
River basin	Llobregat

Subcatchment

River name	Llobregat
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: Increased biodiversity, river Llobregat, Sallent.

Site

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Name	Pallejà
WFD water body codes
WFD (national) typology
WFD water body name
Pre-project morphology	Sinuous, Braided
Reference morphology	Sinuous, Braided
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	Urban
Average bankfull channel width category
Average bankfull channel width (m)
Average bankfull channel depth category
Average bankfull channel depth (m)
Mean discharge category
Mean annual discharge (m3/s)	20.7720.77 m³/s <br />20,770 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)	170 m0.17 km <br />17,000 cm <br />
Project started	2009/01/01
Works started
Works completed	2010/01/01
Project completed
Total cost category
Total cost (k€)
Benefit to cost ratio
Funding sources	ACA 70%, Accionatura 30%

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

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Mitigation of a pressure
Hydromorphology	Structure & condition of riparian zones, Channel pattern/planform, Width & depth variation
Biology
Physico-chemical
Other reasons for the project

Measures

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Structural measures
Bank/bed modifications	Revetmens with local species, Bank stabilization
Floodplain / River corridor	Riparian tree planting, Control of invasive species, Silvicultural treatments
Planform / Channel pattern	Remove obstacles in the riverbed
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
	Before measures	After measures	Qualitative	Quantitative

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

Monitoring documents

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Image gallery

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Map of the restoration area

Reeds on the bank of the Llobregat River

Disposal of dead wooden logs and bird sanctuaries

Placement of stone blocks to improve channel structure. Reprofiling the banks

Reeds removal (before works)

Reeds removal (before works)

Reeds removal

Wastes and debris in the channel before the cleaning tasks

Sheepherding on the banks of the Llobregat River

Volunteers planting vegetation on the banks

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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