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Evaluation of water quality and trophic state in the Parnaiba River Delta, northeast Brazil

2020-02Journal article Restricted access
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dc.contributor.authorPaula Filho, F. J.
dc.contributor.authorMarins, R., V
dc.contributor.authorManuel Zambujal Chicharo, Luis
dc.contributor.authorSouza, R. B.
dc.contributor.authorSantos, G., V
dc.contributor.authorBraz, E. M. A.
dc.date.accessioned2021-06-24T11:35:56Z
dc.date.available2021-06-24T11:35:56Z
dc.date.issued2020-02
dc.description.abstractThis study aims to assess the water quality and trophic state of the Parnaiba River Delta, in the Brazilian northeast, under different hydrological conditions. Surface water samples were collected from 16 sites along the river during 2011 and 2012 at the dry and rainy seasons. The obtained data showed a strong fluvial influence in practically the entire extension of the two deltaic channels. The water quality and trophic state classification was performed by adapting and calculating the Water Quality Index (WQI(min)) and Trophic State Index (TRIXPD). A Principal Component Analysis (PCA) and a Hierarchical Cluster Analysis (HCA) were conducted in order to adjust the index parameters. The WQI(min) results presented medium to good (70 <= WQI(min) <= 90) and bad to medium (26 <= WQI(min) < 70) water quality conditions for the different hydrological periods. The estuary is mainly limited by nitrogen (N:P < 10) in the dry season and by phosphorus (N:P > 20) in the rainy one. The results for TRIXPD, showed a predominance of mesotrophic to eutrophic conditions in the estuarine system (5 <= TRIXPD < 6). This integrated approach can be a promising tool for assessing water quality and trophic status in tropical estuaries. (C) 2020 Elsevier B.V. All rights reserved.
dc.description.sponsorshipNational Council for Scientific and Technological Development (CNPq) through the INCTTMCOcean (Continent-Ocean Materials Transfer) projectConselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPQ) [573.601/2008-9]
dc.description.versioninfo:eu-repo/semantics/publishedVersion
dc.identifier.doi10.1016/j.rsma.2019.101025
dc.identifier.issn2352-4855
dc.identifier.urihttp://hdl.handle.net/10400.1/16583
dc.language.isoeng
dc.peerreviewedyes
dc.publisherElsevier
dc.subjectCoastal waters
dc.subjectHydrochemical variables
dc.subjectWater quality index
dc.subjectTrophic state index
dc.subjectParnaiba River estuary
dc.subject.otherEnvironmental Sciences & Ecology; Marine & Freshwater Biology
dc.titleEvaluation of water quality and trophic state in the Parnaiba River Delta, northeast Brazil
dc.typejournal article
dspace.entity.typePublication
oaire.citation.startPage101025
oaire.citation.titleRegional Studies in Marine Science
oaire.citation.volume34
person.familyNameChicharo
person.givenNameLuis
person.identifier.ciencia-id6716-EE1C-B995
person.identifier.orcid0000-0002-4933-2300
person.identifier.scopus-author-id6602881426
rcaap.rightsrestrictedAccess
rcaap.typearticle
relation.isAuthorOfPublicationd3ff8510-3be1-4a6a-abdd-eb671a819aef
relation.isAuthorOfPublication.latestForDiscoveryd3ff8510-3be1-4a6a-abdd-eb671a819aef

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