Spatial distribution of heavy metals in the surface soil of source-control stormwater infiltration devices - Inter-site comparison

Damien Tedoldi 1, 2 Ghassan Chebbo 1 Daniel Pierlot 2 Philippe Branchu 3 Yves Kovacs 2 Marie-Christine Gromaire 1
1 LEESU - Laboratoire Eau Environnement et Systèmes Urbains
2 SEPIA Conseils (entreprise)
3 Cerema Direction Ile-de-France - Centre d'Etudes et d'Expertise sur les Risques, l'Environnement, la Mobilité et l'Aménagement - Direction Ile-de-France
Abstract : Stormwater runoff infiltration brings about some concerns regarding its potential impact on both soil and groundwater quality; besides, the fate of contaminants in source-control devices somewhat suffers from a lack of documentation. The present study was dedicated to assessing the spatial distribution of three heavy metals (copper, lead, zinc) in the surface soil of ten small-scale infiltration facilities, along with several physical parameters (soil moisture, volatile matter, variable thickness of the upper horizon). High-resolution samplings and in-situ measurements were undertaken, followed by X-ray fluorescence analyses and spatial interpolation. Highest metal accumulation was found in a relatively narrow area near the water inflow zone, from which concentrations markedly decreased with increasing distance. Maximum enrichment ratios amounted to > 20 in the most contaminated sites. Heavy metal patterns give a time-integrated vision of the non-uniform infiltration fluxes, sedimentation processes and surface flow pathways
Keywords : Contamination Metals Runoff infiltration Soil Spatial distribution Sustainable Urban Drainage Systems
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Soumis le : lundi 28 novembre 2016 - 11:04:47
Dernière modification le : jeudi 1 février 2018 - 12:20:04
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ENPC | UPEC-UPEM | AGROPARISTECH | ENPC-LEESU | CEREMA

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Damien Tedoldi, Ghassan Chebbo, Daniel Pierlot, Philippe Branchu, Yves Kovacs, et al.. Spatial distribution of heavy metals in the surface soil of source-control stormwater infiltration devices - Inter-site comparison. Science of the Total Environment, Elsevier, 2017, ⟨10.1016/j.scitotenv.2016.10.226⟩. ⟨hal-01403964⟩

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