S5: Ariñez (Vitoria-Gasteiz, Basque Country, ES)

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Site “S-5”, Location: Ariñez (Vitoria-Gasteiz, Basque Country, ES) 42.8341742,-2.7518019

Brief description:

The surroundings of the industrial estate of Jundiz (West of Vitoria-Gasteiz) have experienced significant growth in the last decades. In many public lands adjacent to road infrastructures, the lack of use followed by uncontrolled landfills and illegal spills, have generated a series of degraded and contaminated plots that degrade the environmental quality and landscape.

Within the framework of PhytoSUDOE, interventions will take place in two plots of municipal property on the outskirts of the industrial estate of Jundiz that, although originally planned as green areas (current `General Urban Development Plan´), are currently degraded by uncontrolled dumping and abandonment. The detected anthropic landfills are very variable in typology and depth, consisting mostly of excavation lands and rocks, but in some cases also include construction and demolition waste and others.

In the case of the site S5, it is located in an area included in the Basque catalogue of potentially contaminated soils and on which an analytical study has been carried out for its characterization. Field sampling has detected the presence of pollutants at different depths, so two test subplots have been included in this location.
In the subplot S5a, contamination was detected in depth but not in surface, whereas in plot S5b it was found both in surface and in depth. The compounds detected were mainly polychlorinated biphenyls and hydrocarbons.

After characterizing the soil and adding organic amendment (compost), on S5 we will combine poplar plantations together with alfalfa plantings without rotation. Also part of the forest plantations will be inoculated with fungi (mycorrhizae fungi) and bacteria to check their influence on soil health.