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Predicting the impact of management and climate scenarios on groundwater nitrate concentration trends in southern Portugal

2021Journal article Restricted access
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dc.contributor.authorCosta, Luis
dc.contributor.authorHugman, Rui
dc.contributor.authorStigter, Tibor Y.
dc.contributor.authorMonteiro, José Paulo
dc.date.accessioned2021-09-15T08:08:34Z
dc.date.available2021-09-15T08:08:34Z
dc.date.issued2021
dc.description.abstractThe dynamics related to evolution of nitrate-contaminated groundwater are analyzed with focus on the impact of intrinsic aquifer properties, agricultural activities and restoration measures at Campina de Faro aquifer (M12), southern Portugal. Agricultural practices in the region developed in the 1970s and resulted in high abstraction rates, nitrate contamination and salinization. Despite the implementation of the European Union (EU) Nitrates Directive since 1997, nitrate levels still show increasing trends at some locations, constituting a threat to the chemical status of M12 and consequent nitrate discharge to Ria Formosa coastal lagoon. Simultaneously, groundwater levels are not dropping consistently, despite apparent overexploitation. A groundwater flow and mass transport model is developed for M12 to assess the evolution of nitrate under different scenarios. Model results reveal that M12 has a hydraulic connection with northernmost aquifers, a process not properly assessed so far. Results further show that nitrate contamination in the upper Plio-Quaternary layer of M12 is extremely persistent and mostly linked to unbalanced fertilizer application practices and irrigation return flows. The response of M12 to implementation of good agricultural practices in compliance with EU policies is slow, indicating that good qualitative status would be impossible to reach by the required EU deadlines. Integration of climate change scenarios into the transport model reveals that despite the implementation of restoration measures, there could be a retardation of the nitrate levels' decrease in the upper aquifer as a result of enhanced evapoconcentration caused by lower recharge, higher water demands and incomplete mixing within the aquifer.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1007/s10040-021-02374-4pt_PT
dc.identifier.issn1431-2174
dc.identifier.urihttp://hdl.handle.net/10400.1/17112
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherSpringerpt_PT
dc.subjectNitratept_PT
dc.subjectContaminationpt_PT
dc.subjectNumerical modellingpt_PT
dc.subjectGroundwater qualitypt_PT
dc.subjectPortugalpt_PT
dc.titlePredicting the impact of management and climate scenarios on groundwater nitrate concentration trends in southern Portugalpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/OE/68312/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/OE/34724/PT
oaire.citation.titleHydrogeology Journalpt_PT
oaire.fundingStreamOE
oaire.fundingStreamOE
person.familyNameCosta
person.familyNameHugman
person.familyNameMonteiro
person.givenNameLuis
person.givenNameRui
person.givenNameJosé Paulo
person.identifier.ciencia-id6F18-2FC6-D658
person.identifier.ciencia-idD312-D1AF-5C07
person.identifier.orcid0000-0001-6595-8285
person.identifier.orcid0000-0003-0891-3886
person.identifier.orcid0000-0002-1969-7480
person.identifier.ridM-8000-2013
person.identifier.scopus-author-id54415674900
person.identifier.scopus-author-id55839822400
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
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