Case study:Guadiamar Green Corridor Project

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Location: 37° 21' 17.55" N, 6° 14' 1.36" W

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Project overview

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Status	Complete
Project web site
Themes
Country	Spain
Main contact forename	MARM
Main contact surname	MARM
Main contact user ID
Contact organisation	Junta de Andalucía
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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In April 1998 there was a breach in a tailings pond in the Guadiamar River area, causing a spill of 6 million cubic hectometres of sludges with a high concentration of heavy metals (zinc, lead, arsenic, copper, antimony, thallium, cadmium). The objectives of this project were the Guadiamar River ecological restoration, removal of sludge and effluent pollutants, and creating a green corridor. In addition, we conducted a strategic planning for the different communities of macroinvertebrates, fish, reptiles, birds... The project included several monitoring programs and analysis, in particular, water quality, to see if the level of pollutants had decreased. This project of restoration and recovery of the area was carried out between 1998 and 2005. The total budget for carry out the rehabilitation and restoration of 62 Km of the Guadiamar River was 165.396.261€. The financing came from the MARM and the Consejería of Environment, Andalucía.

Monitoring surveys and results

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Lessons learnt

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Image gallery

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Aerial view

Map of the area affected by the flood

Photo of the Agrio River and Guadiamar floodplain after flood of toxic sludges.

Cleaning and conditioning of slopes

Mechanical removal of sludges from the riverbed

Aerial view of Guadiamar river floodplain after works

Guadiamar riverside forest

Catchment and subcatchment Select a catchment/subcatchment Edit the catchment and subcatchment details (affects all case studies in this subcatchment) Catchment River basin district C.H.Guadalquivir River basin Guadalquivir Subcatchment River name Guadalquivir Area category Area (km2) Maximum altitude category Less than 100 m Maximum altitude (m) 50 m0.05 km <br />5,000 cm <br /> Dominant geology Ecoregion Ibero-Macaronesian Dominant land cover Extensive agriculture Waterbody ID Other case studies in this subcatchment: Control and permeabilization of the marsh to the river, the Brazo de la Torre and Entremuros, Recovery "CañoTravieso", Recovery of the functionality of Brazo de la Torre, Restoration of streams Chico Soto, Soto Grande and Arroyo de la Laguna de los Reyes, Restoration of the stream of the Partido Site Edit site Name Caño Guadiamar WFD water body codes WFD (national) typology WFD water body name Pre-project morphology Sinuous Reference morphology Sinuous 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 Dominant substrate Clay, Silt River corridor land use Extensive agriculture 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 Edit project background Reach length directly affected (m) 12000 m12 km <br />1,200,000 cm <br /> Project started 1998/04/01 Works started Works completed 2005/11/01 Project completed Total cost category more than 10000 k€ Total cost (k€) Benefit to cost ratio Funding sources 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 Junta de Andalucía Post-project management and maintenance Monitoring Reasons for river restoration Edit reasons for restoration Mitigation of a pressure Pollution incident Hydromorphology Connection to groundwaters, Structure & condition of riparian zones, Channel pattern/planform Biology Physico-chemical Acid neutralising capacity Other reasons for the project Landscape enhancement Measures Edit Measures Structural measures Bank/bed modifications Recovering connectivity longitudinal and transversal Floodplain / River corridor Buffer strips, Recovery of dynamic river system, Facilitate natural regeneration of riparian vegetation Planform / Channel pattern Remove drains and pipes Other Elimination of pollutants due to the discharge of toxic sludge, Recovering natural habitats, Recovering natural landscapes Non-structural measures Management interventions Social measures (incl. engagement) Other Monitoring Hydromorphological quality elements Edit Hydromorphological quality elements Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Connection to groundwaters Yes Yes Yes Yes Awaiting results Structure & condition of riparian zones Yes Yes Yes Yes Awaiting results Channel pattern/planform Yes Yes Yes Awaiting results Biological quality elements Edit biological quality elements Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Physico-chemical quality elements Edit Physico-chemical quality elements Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Acid neutralising capacity Yes Yes Yes Improvement Any other monitoring, e.g. social, economic Edit Other responses Element When monitored Type of monitoring Control site used Result Before measures After measures Qualitative Quantitative Landscape enhancement Yes Yes Yes Yes Improvement Monitoring documents Upload monitoring documents Additional documents and videos Upload additional documents Additional documentation (in Spanish) Additional links and references Edit links and references Link Description Supplementary Information Edit Supplementary Information