Seasonal enhancement of submarine groundwater discharge (SGD)-derived nitrate loading into the Ria Formosa coastal lagoon assessed by 1-D modeling of benthic NO3− profiles

9 pages, 6 figures, 2 tables

Detalhes bibliográficos
Autores: Ibánhez, J. Severino P., Leote, Catarina, Rocha, Carlos
Tipo de documento: artigo
Estado:Versión aceptada para publicación
Data de publicação:2013
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositório:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/376573
Acesso em linha:http://hdl.handle.net/10261/376573
Access Level:Acceso aberto
Palavra-chave:Beach
Diagenesis
Groundwater
Nitrate
Modeling
Sand
SGD
Ria Formosa
Portugal
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spelling Seasonal enhancement of submarine groundwater discharge (SGD)-derived nitrate loading into the Ria Formosa coastal lagoon assessed by 1-D modeling of benthic NO3− profilesIbánhez, J. Severino P.Leote, CatarinaRocha, CarlosBeachDiagenesisGroundwaterNitrateModelingSandSGDRia FormosaPortugal9 pages, 6 figures, 2 tablesThe role of benthic sandy ecosystems in mitigating loads carried by Submarine Groundwater Discharge (SGD) to coastal marine ecosystems is uncertain. Benthic biogeochemical mediation of -rich submarine groundwater discharge was studied at the seepage face of a barrier island site in the Ria Formosa coastal lagoon (Southern Portugal). Preliminary analysis of porewater distributions at the seepage face during discharge indicated that benthic biogeochemical processes could significantly affect the fluxes of groundwater-borne into the lagoon. In order to discriminate between the relative contribution of transport and reaction processes to shape and concentration range evidenced by in-situ porewater gradients, an advection-dispersion-reaction (ADR) model of diagenesis was applied to describe porewater profiles obtained in March, June, September and December 2006. Good agreement between modeled and measured profiles was obtained. Model-derived apparent benthic nitrification and reduction rates ranged from 0.01 to 5.2 mmol m−2 h−1, sufficient to explain gross observed changes in fluxes arriving at the seepage face (up to 70% within the surficial 20 cm depth layer). Results of the analysis indicated that the upper limit of the seepage face promoted mitigation of fluxes to the lagoon throughout the year. In contrast, the lower limit of the seepage area promoted net amplification of the fluxes into the lagoon in June and September. These results will help constrain further work aiming to clarify the role of permeable sediments in mitigating nitrogen loading of coastal ecosystemsFinancial support was provided by the Portuguese Foundation for Science and Technology (FCT) through grant contracts SFRH/BD/39170/2007 (Fellowship to JSPI) and SFRH/BD/38856/2007 (Fellowship to CL), and project O-DOIS: Oxygen dynamics coupled to carbon mineralization in sandy intertidal sediments, contract ref: POCTI/CTA/47048/2002Peer reviewedElsevierFundação para a Ciência e a Tecnologia (Portugal)202520252013info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/376573reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttps://doi.org/10.1016/j.ecss.2012.04.015Noinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3765732026-05-22T06:33:51Z
dc.title.none.fl_str_mv Seasonal enhancement of submarine groundwater discharge (SGD)-derived nitrate loading into the Ria Formosa coastal lagoon assessed by 1-D modeling of benthic NO3− profiles
title Seasonal enhancement of submarine groundwater discharge (SGD)-derived nitrate loading into the Ria Formosa coastal lagoon assessed by 1-D modeling of benthic NO3− profiles
spellingShingle Seasonal enhancement of submarine groundwater discharge (SGD)-derived nitrate loading into the Ria Formosa coastal lagoon assessed by 1-D modeling of benthic NO3− profiles
Ibánhez, J. Severino P.
Beach
Diagenesis
Groundwater
Nitrate
Modeling
Sand
SGD
Ria Formosa
Portugal
title_short Seasonal enhancement of submarine groundwater discharge (SGD)-derived nitrate loading into the Ria Formosa coastal lagoon assessed by 1-D modeling of benthic NO3− profiles
title_full Seasonal enhancement of submarine groundwater discharge (SGD)-derived nitrate loading into the Ria Formosa coastal lagoon assessed by 1-D modeling of benthic NO3− profiles
title_fullStr Seasonal enhancement of submarine groundwater discharge (SGD)-derived nitrate loading into the Ria Formosa coastal lagoon assessed by 1-D modeling of benthic NO3− profiles
title_full_unstemmed Seasonal enhancement of submarine groundwater discharge (SGD)-derived nitrate loading into the Ria Formosa coastal lagoon assessed by 1-D modeling of benthic NO3− profiles
title_sort Seasonal enhancement of submarine groundwater discharge (SGD)-derived nitrate loading into the Ria Formosa coastal lagoon assessed by 1-D modeling of benthic NO3− profiles
dc.creator.none.fl_str_mv Ibánhez, J. Severino P.
Leote, Catarina
Rocha, Carlos
author Ibánhez, J. Severino P.
author_facet Ibánhez, J. Severino P.
Leote, Catarina
Rocha, Carlos
author_role author
author2 Leote, Catarina
Rocha, Carlos
author2_role author
author
dc.contributor.none.fl_str_mv Fundação para a Ciência e a Tecnologia (Portugal)
dc.subject.none.fl_str_mv Beach
Diagenesis
Groundwater
Nitrate
Modeling
Sand
SGD
Ria Formosa
Portugal
topic Beach
Diagenesis
Groundwater
Nitrate
Modeling
Sand
SGD
Ria Formosa
Portugal
description 9 pages, 6 figures, 2 tables
publishDate 2013
dc.date.none.fl_str_mv 2013
2025
2025
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Postprint
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/376573
url http://hdl.handle.net/10261/376573
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv https://doi.org/10.1016/j.ecss.2012.04.015
No
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,812455

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