Environmental status of water and sediment around submarine outfalls – west coast of Portugal = Qualidade da água e dos sedimentos na zona circundante de oito emissários submarinos – costa oeste de Portugal

Detalhes bibliográficos
Autor(a) principal: Santos, Cristina
Data de Publicação: 2011
Outros Autores: Barreiros, M. Alexandra, Pestana, Pilar, Cardoso, Ana, Freire, Alexandre
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.9/1335
Resumo: The sea along the western coast of Portugal presents hydrodynamic conditions that place it among the most favourable of European coastal waters for dilution and dispersion of waste water. Thus it is an appropriate zone for the location of submarine outfalls. According to the European Union Directives and Portuguese Regulations the waste waters produced by this densely populated coast should be treated, therefore 18 wastewater treatment plants with submarine outfalls were built along the coast. Between 2002 and 2004, five sampling campaigns were performed in seven outfalls that were selected to participate in water and sediment quality surveys supported by INAG (Portuguese Water Institute), and performed by the Hydrographic Institute of the Portuguese Navy. The water quality assessment was based on 10 chemical and physical parameters, including heavy metals. The results were compared with reference values and data from the largest flow outfall located at Guia, which has an autonomous monitoring program. In order to evaluate significant differences in water quality between years and sampling sites, statistical analyses were performed. S ediments were evaluated for grain size, heavy metals, PAH, hydrocarbons, chlorinated pesticides and PCB. In order to evaluate the level of pollution of the different areas where the outfalls are located, the concentration factor (CF) (sediment/water elemental concentration ratio) was calculated and compared with the recommended values for the CF of each element. The water sampling program did not allow identifying a clear seasonal evolutionary pattern. The environmental status of the waters surrounding the outfalls discharges comply, to a great extent, with the reference values proposed by INAG and did not revel high levels of contaminants. Due to the low sorptive capacity of the sediment for contaminants, trace metals, hydrocarbons and PAHs have a low environmental impact. The values of the concentration factors for metals are below the recommended values.
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spelling Environmental status of water and sediment around submarine outfalls – west coast of Portugal = Qualidade da água e dos sedimentos na zona circundante de oito emissários submarinos – costa oeste de PortugalSubmarine outfallReceiving watersSedimentsMonitoringEmissário submarinoMeio receptorMonitorizaçãoSedimentosThe sea along the western coast of Portugal presents hydrodynamic conditions that place it among the most favourable of European coastal waters for dilution and dispersion of waste water. Thus it is an appropriate zone for the location of submarine outfalls. According to the European Union Directives and Portuguese Regulations the waste waters produced by this densely populated coast should be treated, therefore 18 wastewater treatment plants with submarine outfalls were built along the coast. Between 2002 and 2004, five sampling campaigns were performed in seven outfalls that were selected to participate in water and sediment quality surveys supported by INAG (Portuguese Water Institute), and performed by the Hydrographic Institute of the Portuguese Navy. The water quality assessment was based on 10 chemical and physical parameters, including heavy metals. The results were compared with reference values and data from the largest flow outfall located at Guia, which has an autonomous monitoring program. In order to evaluate significant differences in water quality between years and sampling sites, statistical analyses were performed. S ediments were evaluated for grain size, heavy metals, PAH, hydrocarbons, chlorinated pesticides and PCB. In order to evaluate the level of pollution of the different areas where the outfalls are located, the concentration factor (CF) (sediment/water elemental concentration ratio) was calculated and compared with the recommended values for the CF of each element. The water sampling program did not allow identifying a clear seasonal evolutionary pattern. The environmental status of the waters surrounding the outfalls discharges comply, to a great extent, with the reference values proposed by INAG and did not revel high levels of contaminants. Due to the low sorptive capacity of the sediment for contaminants, trace metals, hydrocarbons and PAHs have a low environmental impact. The values of the concentration factors for metals are below the recommended values.Repositório do LNEGSantos, CristinaBarreiros, M. AlexandraPestana, PilarCardoso, AnaFreire, Alexandre2011-06-20T11:08:54Z2011-01-01T00:00:00Z2011-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.9/1335engSantos, C.; Barreiros, M. A.; Pestana, P.; Cardos, A.; Freire, A. Environmental status of water and sediment around submarine outfalls – west coast of Portugal = Qualidade da água e dos sedimentos na zona circundante de oito emissários submarinos – costa oeste de Portugal. In: Revista da Gestão Costeira Integrada / Journal of Integrated Coastal Zone Management, 2011, vol. 11, nº 2, p. 207-217info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2022-09-06T12:25:51Zoai:repositorio.lneg.pt:10400.9/1335Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T15:34:10.525372Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Environmental status of water and sediment around submarine outfalls – west coast of Portugal = Qualidade da água e dos sedimentos na zona circundante de oito emissários submarinos – costa oeste de Portugal
title Environmental status of water and sediment around submarine outfalls – west coast of Portugal = Qualidade da água e dos sedimentos na zona circundante de oito emissários submarinos – costa oeste de Portugal
spellingShingle Environmental status of water and sediment around submarine outfalls – west coast of Portugal = Qualidade da água e dos sedimentos na zona circundante de oito emissários submarinos – costa oeste de Portugal
Santos, Cristina
Submarine outfall
Receiving waters
Sediments
Monitoring
Emissário submarino
Meio receptor
Monitorização
Sedimentos
title_short Environmental status of water and sediment around submarine outfalls – west coast of Portugal = Qualidade da água e dos sedimentos na zona circundante de oito emissários submarinos – costa oeste de Portugal
title_full Environmental status of water and sediment around submarine outfalls – west coast of Portugal = Qualidade da água e dos sedimentos na zona circundante de oito emissários submarinos – costa oeste de Portugal
title_fullStr Environmental status of water and sediment around submarine outfalls – west coast of Portugal = Qualidade da água e dos sedimentos na zona circundante de oito emissários submarinos – costa oeste de Portugal
title_full_unstemmed Environmental status of water and sediment around submarine outfalls – west coast of Portugal = Qualidade da água e dos sedimentos na zona circundante de oito emissários submarinos – costa oeste de Portugal
title_sort Environmental status of water and sediment around submarine outfalls – west coast of Portugal = Qualidade da água e dos sedimentos na zona circundante de oito emissários submarinos – costa oeste de Portugal
author Santos, Cristina
author_facet Santos, Cristina
Barreiros, M. Alexandra
Pestana, Pilar
Cardoso, Ana
Freire, Alexandre
author_role author
author2 Barreiros, M. Alexandra
Pestana, Pilar
Cardoso, Ana
Freire, Alexandre
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Repositório do LNEG
dc.contributor.author.fl_str_mv Santos, Cristina
Barreiros, M. Alexandra
Pestana, Pilar
Cardoso, Ana
Freire, Alexandre
dc.subject.por.fl_str_mv Submarine outfall
Receiving waters
Sediments
Monitoring
Emissário submarino
Meio receptor
Monitorização
Sedimentos
topic Submarine outfall
Receiving waters
Sediments
Monitoring
Emissário submarino
Meio receptor
Monitorização
Sedimentos
description The sea along the western coast of Portugal presents hydrodynamic conditions that place it among the most favourable of European coastal waters for dilution and dispersion of waste water. Thus it is an appropriate zone for the location of submarine outfalls. According to the European Union Directives and Portuguese Regulations the waste waters produced by this densely populated coast should be treated, therefore 18 wastewater treatment plants with submarine outfalls were built along the coast. Between 2002 and 2004, five sampling campaigns were performed in seven outfalls that were selected to participate in water and sediment quality surveys supported by INAG (Portuguese Water Institute), and performed by the Hydrographic Institute of the Portuguese Navy. The water quality assessment was based on 10 chemical and physical parameters, including heavy metals. The results were compared with reference values and data from the largest flow outfall located at Guia, which has an autonomous monitoring program. In order to evaluate significant differences in water quality between years and sampling sites, statistical analyses were performed. S ediments were evaluated for grain size, heavy metals, PAH, hydrocarbons, chlorinated pesticides and PCB. In order to evaluate the level of pollution of the different areas where the outfalls are located, the concentration factor (CF) (sediment/water elemental concentration ratio) was calculated and compared with the recommended values for the CF of each element. The water sampling program did not allow identifying a clear seasonal evolutionary pattern. The environmental status of the waters surrounding the outfalls discharges comply, to a great extent, with the reference values proposed by INAG and did not revel high levels of contaminants. Due to the low sorptive capacity of the sediment for contaminants, trace metals, hydrocarbons and PAHs have a low environmental impact. The values of the concentration factors for metals are below the recommended values.
publishDate 2011
dc.date.none.fl_str_mv 2011-06-20T11:08:54Z
2011-01-01T00:00:00Z
2011-01-01T00:00:00Z
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dc.identifier.uri.fl_str_mv http://hdl.handle.net/10400.9/1335
url http://hdl.handle.net/10400.9/1335
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Santos, C.; Barreiros, M. A.; Pestana, P.; Cardos, A.; Freire, A. Environmental status of water and sediment around submarine outfalls – west coast of Portugal = Qualidade da água e dos sedimentos na zona circundante de oito emissários submarinos – costa oeste de Portugal. In: Revista da Gestão Costeira Integrada / Journal of Integrated Coastal Zone Management, 2011, vol. 11, nº 2, p. 207-217
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