Case study:Sustainable management, at local level, of the alluvial aquifer of the River Tordera, through the reuse of waste water

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Location: 41° 41' 46.59" N, 2° 44' 0.73" E
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Project overview

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Status Complete
Project web site
Themes
Country Spain
Main contact forename Lluis
Main contact surname Balaguer
Main contact user ID
Contact organisation ACA
Contact organisation web site
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Project summary

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The rivers of the Mediterranean countries are subject to intense human occupancy that causes problems in the exploitation of their resources. The overuse of water resources (urban, industrial and agricultural) leads to the following impacts on alluvial aquifers: The water table is lowered and the capacity of the bores is reduced; the drought period is extended, leaving the river bed dry for increasing periods; groundwater quality is reduced and urban water supply sources become polluted; protected wetlands dry up, biodiversity is lost and conservation problems arise. The Tordera Aquifer project will strive to reverse this trend by improving water management in the Tordera municipality. The objectives are as follows: improve quality of the sewage system; recycled treated water for conservation (aquifer recharge, establishment of wetlands); use of renewable energy and low-maintenance, soft treatment systems in the processes; serve as a pioneer example for other communities in the same river basin which can manage their water resources in a similar way. This project counts with the support of local, regional and European institutions. The financing comes from the LIFE initiative, the Tordera City Council and the Government of Cataluña. The total budget is 1.409.139€ (LIFE support 338.101€).

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 Tordera

Subcatchment

River name Tordera
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: Fluvial river restoration of Tordera in Sant Celoni, Fluvial river restoration of Tordera in Tordera


Site

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Name Río Tordera
WFD water body codes
WFD (national) typology
WFD water body name
Pre-project morphology Braided
Reference morphology 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)
Average channel gradient category
Average channel gradient
Average unit stream power (W/m2)


Project background

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Reach length directly affected (m) 55 m0.055 km <br />5,500 cm <br />
Project started 2001/07/01
Works started
Works completed 2003/12/01
Project completed
Total cost category 1000 - 5000 k€
Total cost (k€) 1409 k€1,409,000 € <br />
Benefit to cost ratio
Funding sources LIFE project 338.101€, ACA, Tordera city council

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 ISTEM (sistema de placas fotovoltaica)
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Reasons for river restoration

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Mitigation of a pressure Abstraction
Hydromorphology Connection to groundwaters
Biology
Physico-chemical Salinity
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Measures

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Structural measures
Bank/bed modifications
Floodplain / River corridor Creation of an infiltration lagoon, New habitats construction
Planform / Channel pattern
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Non-structural measures
Management interventions
Social measures (incl. engagement) Communication and dissemination program of environmental problems in the area.
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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
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Physico-chemical quality elements

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quality elements
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Any other monitoring, e.g. social, economic

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Monitoring documents

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Image gallery


Aerial view of the restoration area
Solar panels for powering pumps water reuse


Additional documents and videos

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Additional documentation (in Spanish)


Additional links and references

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Supplementary Information

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