Deoxygenation rate, reaeration and potential for self-purification of a small tropical urban stream

Detalhes bibliográficos
Autor(a) principal: Menezes, Joao Paulo Cunha de
Data de Publicação: 2015
Outros Autores: Bittencourt, Ricardo Parreira, Farias, Matheus De Sá, Bello, Italoema Pinheiro, Oliveira, Luiz Fernando Coutinho de, Fia, Ronaldo
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFLA
Texto Completo: http://repositorio.ufla.br/jspui/handle/1/42074
Resumo: Mathematical models used to simulate the water quality and the processes of self-purification of water bodies are important tools to support effective water resource management. The objective of this study was to evaluate the impact of organic pollution on water quality and the assimilative capacity of organic matter in the Ribeirão Vermelho stream situated in the city of Lavras in Minas Gerais. The deoxygenation rate (K1) and reaeration (K2) were determined and tested in three segments of the Ribeirão Vermelho over two seasons (summer and winter). The purification process simulation was performed using the Streeter-Phelps model. The highest K1 and K2values occurred during the winter period which was characterized by lower flows. Simulation of the dissolved oxygen profile and biological oxygen demand fitted the model well, indicating the prevalence of carbonaceous deoxygenation due to nitrification and also demonstrating the importance of natural reaeration as part of the purification process. Different response was observed during the winter, in which the high primary productivity values stood in the reaeration process stream. Biological oxygen demand values did not meet the limits recommended by the Resolution of the Ministry of the Environment 357/2005 throughout the river system and the entire study period. In conclusion, the Ribeirão Vermelho is unable to self-purify along its entire length, and water quality is influenced by effluent discharge which intensifies degradation.
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spelling Deoxygenation rate, reaeration and potential for self-purification of a small tropical urban streamCoeficiente de desoxigenação, reaeração e potencial de auto purificação de um ribeirão urbanoEffluent releaseStreeter Phelps modelsWater qualityLançamento de efluentesÁgua - QualidadePoluição orgânicaModelos matemáticosMathematical models used to simulate the water quality and the processes of self-purification of water bodies are important tools to support effective water resource management. The objective of this study was to evaluate the impact of organic pollution on water quality and the assimilative capacity of organic matter in the Ribeirão Vermelho stream situated in the city of Lavras in Minas Gerais. The deoxygenation rate (K1) and reaeration (K2) were determined and tested in three segments of the Ribeirão Vermelho over two seasons (summer and winter). The purification process simulation was performed using the Streeter-Phelps model. The highest K1 and K2values occurred during the winter period which was characterized by lower flows. Simulation of the dissolved oxygen profile and biological oxygen demand fitted the model well, indicating the prevalence of carbonaceous deoxygenation due to nitrification and also demonstrating the importance of natural reaeration as part of the purification process. Different response was observed during the winter, in which the high primary productivity values stood in the reaeration process stream. Biological oxygen demand values did not meet the limits recommended by the Resolution of the Ministry of the Environment 357/2005 throughout the river system and the entire study period. In conclusion, the Ribeirão Vermelho is unable to self-purify along its entire length, and water quality is influenced by effluent discharge which intensifies degradation.Os modelos matemáticos utilizados para simular a qualidade da água e o processo de autodepuração de corpos d'água são importantes ferramentas de auxílio à gestão dos recursos hídricos. Assim, o objetivo deste trabalho foi avaliar o impacto da poluição orgânica na qualidade da água e a capacidade de assimilação da matéria orgânica no Ribeirão Vermelho. Para essa finalidade, foi desenvolvido e testados os coeficientes de desoxigenação (K1) e reaeração (K2), em três trechos e em dois períodos distintos (verão e inverno). Os maiores valores de K1 e K2 foram obtidos durante o inverno, onde foram registrados as menores vazões. A simulação do processo de autodepuração foi realizada com o uso do modelo de Streeter-Phelps. A simulação do perfil de OD e DBO no verão apresentou calibração aceitável, tendo em vista a otimização dos coeficientes, evidenciando a prevalência da desoxigenação por demanda carbonácea sobre a nitrificação e a importância da reaeração natural no processo de autodepuração. Comportamento diferente foi observado no inverno, no qual os altos valores de produtividades sobressaíram no processo de reaeração no ribeirão. Apenas o parâmetro demanda bioquímica de oxigênio não respeitou os limites preconizados pela Resolução do Ministério do Meio Ambiente 357/2005, tendo ficado em toda a extensão do rio e, em ambos períodos, fora da regulamentação. Desta forma, conclui-se que o Ribeirão Vermelho não consegue se auto depurar ao longo de sua extensão até a foz, tendo a qualidade de suas águas influenciadas por lançamentos de efluentes que intensifica o processo de degradação do rio.Instituto de Pesquisas Ambientais em Bacias Hidrográficas (IPABHi)2020-07-22T18:16:04Z2020-07-22T18:16:04Z2015info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfMENEZES, J. P. C. de et al. Deoxygenation rate, reaeration and potential for self-purification of a small tropical urban stream. Revista Ambiente & Água, Taubaté, v. 10, n. 4, p. 748-757, out./dez. 2015.http://repositorio.ufla.br/jspui/handle/1/42074Revista Ambiente & Águareponame:Repositório Institucional da UFLAinstname:Universidade Federal de Lavras (UFLA)instacron:UFLAhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessMenezes, Joao Paulo Cunha deBittencourt, Ricardo ParreiraFarias, Matheus De SáBello, Italoema PinheiroOliveira, Luiz Fernando Coutinho deFia, Ronaldoeng2020-07-22T18:16:19Zoai:localhost:1/42074Repositório InstitucionalPUBhttp://repositorio.ufla.br/oai/requestnivaldo@ufla.br || repositorio.biblioteca@ufla.bropendoar:2020-07-22T18:16:19Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA)false
dc.title.none.fl_str_mv Deoxygenation rate, reaeration and potential for self-purification of a small tropical urban stream
Coeficiente de desoxigenação, reaeração e potencial de auto purificação de um ribeirão urbano
title Deoxygenation rate, reaeration and potential for self-purification of a small tropical urban stream
spellingShingle Deoxygenation rate, reaeration and potential for self-purification of a small tropical urban stream
Menezes, Joao Paulo Cunha de
Effluent release
Streeter Phelps models
Water quality
Lançamento de efluentes
Água - Qualidade
Poluição orgânica
Modelos matemáticos
title_short Deoxygenation rate, reaeration and potential for self-purification of a small tropical urban stream
title_full Deoxygenation rate, reaeration and potential for self-purification of a small tropical urban stream
title_fullStr Deoxygenation rate, reaeration and potential for self-purification of a small tropical urban stream
title_full_unstemmed Deoxygenation rate, reaeration and potential for self-purification of a small tropical urban stream
title_sort Deoxygenation rate, reaeration and potential for self-purification of a small tropical urban stream
author Menezes, Joao Paulo Cunha de
author_facet Menezes, Joao Paulo Cunha de
Bittencourt, Ricardo Parreira
Farias, Matheus De Sá
Bello, Italoema Pinheiro
Oliveira, Luiz Fernando Coutinho de
Fia, Ronaldo
author_role author
author2 Bittencourt, Ricardo Parreira
Farias, Matheus De Sá
Bello, Italoema Pinheiro
Oliveira, Luiz Fernando Coutinho de
Fia, Ronaldo
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Menezes, Joao Paulo Cunha de
Bittencourt, Ricardo Parreira
Farias, Matheus De Sá
Bello, Italoema Pinheiro
Oliveira, Luiz Fernando Coutinho de
Fia, Ronaldo
dc.subject.por.fl_str_mv Effluent release
Streeter Phelps models
Water quality
Lançamento de efluentes
Água - Qualidade
Poluição orgânica
Modelos matemáticos
topic Effluent release
Streeter Phelps models
Water quality
Lançamento de efluentes
Água - Qualidade
Poluição orgânica
Modelos matemáticos
description Mathematical models used to simulate the water quality and the processes of self-purification of water bodies are important tools to support effective water resource management. The objective of this study was to evaluate the impact of organic pollution on water quality and the assimilative capacity of organic matter in the Ribeirão Vermelho stream situated in the city of Lavras in Minas Gerais. The deoxygenation rate (K1) and reaeration (K2) were determined and tested in three segments of the Ribeirão Vermelho over two seasons (summer and winter). The purification process simulation was performed using the Streeter-Phelps model. The highest K1 and K2values occurred during the winter period which was characterized by lower flows. Simulation of the dissolved oxygen profile and biological oxygen demand fitted the model well, indicating the prevalence of carbonaceous deoxygenation due to nitrification and also demonstrating the importance of natural reaeration as part of the purification process. Different response was observed during the winter, in which the high primary productivity values stood in the reaeration process stream. Biological oxygen demand values did not meet the limits recommended by the Resolution of the Ministry of the Environment 357/2005 throughout the river system and the entire study period. In conclusion, the Ribeirão Vermelho is unable to self-purify along its entire length, and water quality is influenced by effluent discharge which intensifies degradation.
publishDate 2015
dc.date.none.fl_str_mv 2015
2020-07-22T18:16:04Z
2020-07-22T18:16:04Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv MENEZES, J. P. C. de et al. Deoxygenation rate, reaeration and potential for self-purification of a small tropical urban stream. Revista Ambiente & Água, Taubaté, v. 10, n. 4, p. 748-757, out./dez. 2015.
http://repositorio.ufla.br/jspui/handle/1/42074
identifier_str_mv MENEZES, J. P. C. de et al. Deoxygenation rate, reaeration and potential for self-purification of a small tropical urban stream. Revista Ambiente & Água, Taubaté, v. 10, n. 4, p. 748-757, out./dez. 2015.
url http://repositorio.ufla.br/jspui/handle/1/42074
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv http://creativecommons.org/licenses/by/4.0/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Instituto de Pesquisas Ambientais em Bacias Hidrográficas (IPABHi)
publisher.none.fl_str_mv Instituto de Pesquisas Ambientais em Bacias Hidrográficas (IPABHi)
dc.source.none.fl_str_mv Revista Ambiente & Água
reponame:Repositório Institucional da UFLA
instname:Universidade Federal de Lavras (UFLA)
instacron:UFLA
instname_str Universidade Federal de Lavras (UFLA)
instacron_str UFLA
institution UFLA
reponame_str Repositório Institucional da UFLA
collection Repositório Institucional da UFLA
repository.name.fl_str_mv Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA)
repository.mail.fl_str_mv nivaldo@ufla.br || repositorio.biblioteca@ufla.br
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