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Assessment of groundwater contamination in an agricultural peri-urban area (NW Portugal): an integrated approach

2015-03Journal article Open access
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dc.contributor.authorBarroso, M. Fátima
dc.contributor.authorRamalhosa, Maria João
dc.contributor.authorOlhero, A.
dc.contributor.authorAntão, M. C.
dc.contributor.authorPina, M. F.
dc.contributor.authorGuimarães, L.
dc.contributor.authorTeixeira, J.
dc.contributor.authorAfonso, M. J.
dc.contributor.authorDelerue-Matos, Cristina
dc.contributor.authorChaminé, Helder I.
dc.date.accessioned2015-12-23T15:52:45Z
dc.date.available2015-12-23T15:52:45Z
dc.date.issued2015-03
dc.description.abstractThe excessive use of pesticides and fertilisers in agriculture has generated a decrease in groundwater and surface water quality in many regions of the EU, constituting a hazard for human health and the environment. Besides, on-site sewage disposal is an important source of groundwater contamination in urban and peri-urban areas. The assessment of groundwater vulnerability to contamination is an important tool to fulfil the demands of EU Directives. The purpose of this study is to assess the groundwater vulnerability to contamination related mainly to agricultural activities in a peri-urban area (Vila do Conde, NW Portugal). The hydrogeological framework is characterised mainly by fissured granitic basement and sedimentary cover. Water samples were collected and analysed for temperature, pH, electrical conductivity, chloride, phosphate, nitrate and nitrite. An evaluation of groundwater vulnerability to contamination was applied (GOD-S, Pesticide DRASTIC-Fm, SINTACS and SI) and the potential nitrate contamination risk was assessed, both on a hydrogeological GIS-based mapping. A principal component analysis was performed to characterised patterns of relationship among groundwater contamination, vulnerability, and the hydrogeological setting assessed. Levels of nitrate above legislation limits were detected in 75 % of the samples analysed. Alluvia units showed the highest nitrate concentrations and also the highest vulnerability and risk. Nitrate contamination is a serious problem affecting groundwater, particularly shallow aquifers, especially due to agriculture activities, livestock and cesspools. GIS-based cartography provided an accurate way to improve knowledge on water circulation models and global functioning of local aquifer systems. Finally, this study highlights the adequacy of an integrated approach, combining hydrogeochemical data, vulnerability assessments and multivariate analysis, to understand groundwater processes in peri-urban areas.pt_PT
dc.identifier.doi10.1007/s12665-014-3297-3pt_PT
dc.identifier.issn1866-6299
dc.identifier.urihttp://hdl.handle.net/10400.22/7250
dc.language.isoengpt_PT
dc.publisherSpringerpt_PT
dc.relation.ispartofseriesEnvironmental Earth Sciences;Vol. 73, Issue 6
dc.relation.publisherversionhttp://link.springer.com/article/10.1007/s12665-014-3297-3pt_PT
dc.subjectGroundwater qualitypt_PT
dc.subjectAgricultural activitypt_PT
dc.subjectVulnerabilitypt_PT
dc.subjectUrban hydrologypt_PT
dc.subjectNW Portugalpt_PT
dc.titleAssessment of groundwater contamination in an agricultural peri-urban area (NW Portugal): an integrated approachpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage2894pt_PT
oaire.citation.startPage2881pt_PT
oaire.citation.titleEnvironmental Earth Sciencespt_PT
oaire.citation.volume73pt_PT
person.familyNamede Sá Barroso
person.familyNameRamalhosa
person.familyNameDelerue-Matos
person.familyNameI. Chaminé
person.givenNameMaria de Fátima
person.givenNameMaria João
person.givenNameCristina
person.givenNameHelder
person.identifier.ciencia-idAF16-22E5-5EBD
person.identifier.ciencia-id421A-C491-F45B
person.identifier.ciencia-id9A1A-43FB-5C27
person.identifier.ciencia-idA219-6949-7254
person.identifier.orcid0000-0001-9011-5992
person.identifier.orcid0000-0002-1951-3557
person.identifier.orcid0000-0002-3924-776X
person.identifier.orcid0000-0002-9740-935X
person.identifier.ridD-8293-2013
person.identifier.ridD-4990-2013
person.identifier.scopus-author-id25631648000
person.identifier.scopus-author-id35488836000
person.identifier.scopus-author-id6603741848
person.identifier.scopus-author-id8782621900
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
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relation.isAuthorOfPublication.latestForDiscovery09f6a7bd-2f15-42b0-adc5-04bd22210519

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