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Please use this identifier to cite or link to this item: http://hdl.handle.net/1843/52113
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dc.creatorThiago Nogueiraluconpt_BR
dc.creatorAdivane Terezinha Costapt_BR
dc.creatorPaulo Henrique Ferreira Galvãopt_BR
dc.creatorMariangela Garcia Praça Leitept_BR
dc.date.accessioned2023-04-17T22:30:34Z-
dc.date.available2023-04-17T22:30:34Z-
dc.date.issued2018-
dc.citation.volume48pt_BR
dc.citation.issue4pt_BR
dc.citation.spage867pt_BR
dc.citation.epage879pt_BR
dc.identifier.doihttps://doi.org/10.1590/2317-4889201820180071pt_BR
dc.identifier.urihttp://hdl.handle.net/1843/52113-
dc.description.resumoKarst aquifers are large water reservoirs that supply approximately 25% of the world population. They are also extremely sensitive to contamination, demanding knowledge on groundwater quality regarding base level conditions for the main cations and anions. Knowing the Natural Background Level (NBL) values of these waters becomes an indispensable measure to understand aquifers and hydrochemical anomalies, either from anthropogenic or geogenic origin. This paper aimed to provide a hydrochemical characterization and to propose NBL 90% values for the little-studied groundwater of the São Miguel River watershed, Upper São Francisco River, MG, Brazil. NBL 90% values were estimated using statistical analyses followed by an analysis of seasonal influence on observed concentrations. The water was classified as calcium bicarbonate, with the highest NBL 90% values occurring during the rainy season for Ca 2+ , K + , HCO 3 - , SO 4 2- , Cl - , NO 3 - , and As 3+ . On the other hand, Mg 2+ , Na + , PO 4 3- , and Zn 2+ presented reduction in concentration during this season. Nitrate, phosphate and chloride anomalies (values above NBL 90%) are directly related to human action. Thus, monitoring and proposing NBL 90% values were an essential tool to help in understanding the hydrochemical behavior of waters in this watershed.pt_BR
dc.languageporpt_BR
dc.publisherUniversidade Federal de Minas Geraispt_BR
dc.publisher.countryBrasilpt_BR
dc.publisher.departmentIGC - DEPARTAMENTO DE GEOLOGIApt_BR
dc.publisher.initialsUFMGpt_BR
dc.relation.ispartofDepartment of Geologypt_BR
dc.rightsAcesso Abertopt_BR
dc.subjectNatural Background Levelpt_BR
dc.subjectSão Miguel watershedpt_BR
dc.subjectArcospt_BR
dc.subjectPainspt_BR
dc.subjectUpper São Francisco Basinpt_BR
dc.subjectBrazilpt_BR
dc.subject.otherBrasilpt_BR
dc.subject.otherBacias hidrograficaspt_BR
dc.titleNatural background levels and seasonal influence on groundwater chemistry of the Upper São Francisco karst region, MG, Brazilpt_BR
dc.typeArtigo de Periódicopt_BR
dc.url.externahttps://www.scielo.br/j/bjgeo/a/Zt5V7SHQ5v7rnrYDkDnxJ3P/?lang=enpt_BR
dc.identifier.orcidhttps://orcid.org/0000-0001-9744-2435pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-0440-7970pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0001-7183-0368pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-9789-3786pt_BR
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