Viabilidade da utilização do método delta aproximado para determinação do coeficiente de reaeração em rios

Detalhes bibliográficos
Autor(a) principal: Graepin, Cristiane
Data de Publicação: 2016
Tipo de documento: Dissertação
Idioma: por
Título da fonte: Manancial - Repositório Digital da UFSM
Texto Completo: http://repositorio.ufsm.br/handle/1/7657
Resumo: The dissolved oxygen is an important indicator that shows water quality variation in rivers, caused by the release/accumulation of organic matter. The determination of the reaeration coefficient is indispensable, due to the consumption of dissolved oxygen for the organic matter oxidation. The reaeration coefficient can be determined by empirical models or experimental methods. The experimental methods are generally expensive and slow. However, the Approximate Delta Method proposed by McBride and Chapra (2005) is an experimental method of easy application and low cost. This method is based on surface reaeration estimation, primary production, and respiration. Basically, it is estimated by means of daytime measurements of dissolved oxygen. The main gol was to analyze the application viability of the Approximate Delta Method to determine the reaeration coefficient in watershed. This study was carried out in five watersheds: Cancela-Tamandaí, Menino Deus II, Menino Deus IV, João Goulart and RSC 287. The reaeration coefficient is influenced by hydrodynamic characteristics of the rivers. Thus, the velocity, depth, and flow were monitored. It was determined the temperature of the water and the dissolved oxygen concentrations during the photoperiod, and it was estimated the organic load in the rivers. The application of the Approximate Delta Method was viable only in João Goulart and RSC 287 basins. The Cancela-Tamandaí basin does not presented an adequated dissolved oxygen profile. This was due to the high release of organic matter in the river. The Menino Deus II basin also presented unviability. This was due to the absence of an adequate dissolved oxygen profile. In the Menino Deus IV basin occurred overestimation of the coefficients, when was possible your estimation. In this basin, the minimum deficit in most of the dissolved oxygen profiles was before of the solar noon, avoided the application of the method. In João Goulart basin was viable the application of the method, but with some limitations: flows until 1.00 m3/s; there should be regular presence of organic load; and the time between the dissolved oxygen minimum deficit and the solar noon do not should be too low. The RSC 287 basin was viable in your normal hydrodynamic characteristics. The method was not viable with flow higher than 3.64 m3/s, and in the agriculture irrigation season. Finally, the Approximate Delta Method presented unviability in some conditions: flow greater than 1.00 m3/s for João Goulart basin, and then 3.64 m3/s in the RSC 287 basin; rivers with organic content very low or very high; low time between the dissolved oxygen minimum deficit and solar noon; low temperatures; and rivers with captation of the water. In the João Goulart basin, it was calculated the Pearson correlation coefficient between reaeration coefficient and the others variables. It was found significant correlation of the reaeration coefficient with the flow, depth, and velocity. However, the Approximate Delta Method showed experimentally to be easy to use and low cost. However, with a variety of limitations in its application, making it unviability to certain conditions.
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spelling Viabilidade da utilização do método delta aproximado para determinação do coeficiente de reaeração em riosViability of the use of the approximate delta method for determination of rearation coefficient in riversQualidade da águaOxigênio dissolvidoMatéria orgânicaCaracterísticas hidrodinâmicasWater qualityDissolved oxygenOrganic matterHydrodynamic characteristicsCNPQ::ENGENHARIASThe dissolved oxygen is an important indicator that shows water quality variation in rivers, caused by the release/accumulation of organic matter. The determination of the reaeration coefficient is indispensable, due to the consumption of dissolved oxygen for the organic matter oxidation. The reaeration coefficient can be determined by empirical models or experimental methods. The experimental methods are generally expensive and slow. However, the Approximate Delta Method proposed by McBride and Chapra (2005) is an experimental method of easy application and low cost. This method is based on surface reaeration estimation, primary production, and respiration. Basically, it is estimated by means of daytime measurements of dissolved oxygen. The main gol was to analyze the application viability of the Approximate Delta Method to determine the reaeration coefficient in watershed. This study was carried out in five watersheds: Cancela-Tamandaí, Menino Deus II, Menino Deus IV, João Goulart and RSC 287. The reaeration coefficient is influenced by hydrodynamic characteristics of the rivers. Thus, the velocity, depth, and flow were monitored. It was determined the temperature of the water and the dissolved oxygen concentrations during the photoperiod, and it was estimated the organic load in the rivers. The application of the Approximate Delta Method was viable only in João Goulart and RSC 287 basins. The Cancela-Tamandaí basin does not presented an adequated dissolved oxygen profile. This was due to the high release of organic matter in the river. The Menino Deus II basin also presented unviability. This was due to the absence of an adequate dissolved oxygen profile. In the Menino Deus IV basin occurred overestimation of the coefficients, when was possible your estimation. In this basin, the minimum deficit in most of the dissolved oxygen profiles was before of the solar noon, avoided the application of the method. In João Goulart basin was viable the application of the method, but with some limitations: flows until 1.00 m3/s; there should be regular presence of organic load; and the time between the dissolved oxygen minimum deficit and the solar noon do not should be too low. The RSC 287 basin was viable in your normal hydrodynamic characteristics. The method was not viable with flow higher than 3.64 m3/s, and in the agriculture irrigation season. Finally, the Approximate Delta Method presented unviability in some conditions: flow greater than 1.00 m3/s for João Goulart basin, and then 3.64 m3/s in the RSC 287 basin; rivers with organic content very low or very high; low time between the dissolved oxygen minimum deficit and solar noon; low temperatures; and rivers with captation of the water. In the João Goulart basin, it was calculated the Pearson correlation coefficient between reaeration coefficient and the others variables. It was found significant correlation of the reaeration coefficient with the flow, depth, and velocity. However, the Approximate Delta Method showed experimentally to be easy to use and low cost. However, with a variety of limitations in its application, making it unviability to certain conditions.Coordenação de Aperfeiçoamento de Pessoal de Nível SuperiorO oxigênio dissolvido é um indicador importante que demonstra alterações da qualidade da água em rios, provocadas pelo lançamento/acúmulo de matéria orgânica. A determinação do coeficiente de reaeração torna-se indispensável, devido ao consumo de oxigênio dissolvido na oxidação da matéria orgânica. O coeficiente de reaeração pode ser determinado por modelos de natureza empírica ou métodos experimentais. Os métodos experimentais geralmente são caros e demorados. Porém, o Método Delta Aproximado proposto por McBride e Chapra (2005) é um método experimental de fácil aplicação e baixo custo. O método se baseia na estimativa de reaeração superficial, produção primária e respiração, basicamente por meio de medições diurnas do oxigênio dissolvido. O objetivo principal desse estudo foi analisar a viabilidade de aplicação do Método Delta Aproximado para determinar o coeficiente de reaeração em bacias hidrográficas. O estudo foi realizado em cinco bacias hidrográficas: Cancela-Tamandaí, Menino Deus II, Menino Deus IV, João Goulart e RSC 287. O coeficiente de reaeração é influenciado pelas características hidrodinâmicas dos rios. Assim, nas campanhas foram determinadas a velocidade, profundidade e vazão. Determinou-se a temperatura da água, as concentrações de oxigênio dissolvido, durante o fotoperíodo, e estimou-se a carga orgânica nos rios. Neste estudo a aplicação do Método Delta Aproximado foi viável apenas nas bacias João Goulart e RSC 287. A bacia Cancela-Tamandaí não apresentou um perfil de oxigênio dissolvido adequado, devido ao elevado lançamento de matéria orgânica no rio. A bacia Menino Deus II também apresentou inviabilidade, devido à ausência de um perfil de oxigênio dissolvido adequado. A bacia Menino Deus IV apresentou superestimação dos valores do coeficiente, e em grande parte das campanhas o mínimo déficit de oxigênio dissolvido ocorreu antes do meio-dia solar, impossibilitando a aplicação do método. Na bacia João Goulart foi viável a aplicação do método, porém com as seguintes limitações: viável em vazões de até 1,00 m3/s; deve haver presença regular de carga orgânica; o tempo entre o mínimo déficit de oxigênio dissolvido e o meio-dia solar não deve ser muito baixo. A bacia RSC 287 apresentou-se viável quanto à aplicação do método em suas características normais, no entanto nas campanhas com vazões maiores que 3,64 m3/s, e com presença de captação de água para irrigação o método não foi viável. Enfim, o Método Delta Aproximado apresentou inviabilidade nas seguintes condições: vazão maior que 1,00 m3/s para a bacia João Goulart e maior que 3,64 m3/s na bacia RSC 287; rios com teor de matéria orgânica muito alto ou muito baixo; baixo tempo entre o mínimo déficit de oxigênio dissolvido e o meio-dia solar; temperaturas baixas; e rios com captação de água. Na bacia João Goulart, onde o método pôde ser aplicado, foi feito correlação de Pearson com o coeficiente e as variáveis analisadas. Verificou-se correlação positiva significativa do coeficiente com a vazão, profundidade e velocidade. Contudo, o Método Delta Aproximado demonstrou experimentalmente ser de fácil aplicação e baixo custo. Porém, com uma diversidade de limitações em sua aplicação, tornando-o inviável em determinadas condições.Universidade Federal de Santa MariaBREngenharia AmbientalUFSMPrograma de Pós-Graduação em Engenharia AmbientalGastaldini, Maria do Carmo Caudurohttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4790803A8Carissimi, Elvishttp://lattes.cnpq.br/4642912749433316Pinheiro, Adilsonhttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4787528J1Graepin, Cristiane2016-07-082016-07-082016-03-28info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfapplication/pdfGRAEPIN, Cristiane. VIABILITY OF THE USE OF THE APPROXIMATE DELTA METHOD FOR DETERMINATION OF REARATION COEFFICIENT IN RIVERS. 2016. 134 f. Dissertação (Mestrado em Engenharias) - Universidade Federal de Santa Maria, Santa Maria, 2016.http://repositorio.ufsm.br/handle/1/7657porinfo:eu-repo/semantics/openAccessreponame:Manancial - Repositório Digital da UFSMinstname:Universidade Federal de Santa Maria (UFSM)instacron:UFSM2022-03-16T20:30:17Zoai:repositorio.ufsm.br:1/7657Biblioteca Digital de Teses e Dissertaçõeshttps://repositorio.ufsm.br/ONGhttps://repositorio.ufsm.br/oai/requestatendimento.sib@ufsm.br||tedebc@gmail.comopendoar:2022-03-16T20:30:17Manancial - Repositório Digital da UFSM - Universidade Federal de Santa Maria (UFSM)false
dc.title.none.fl_str_mv Viabilidade da utilização do método delta aproximado para determinação do coeficiente de reaeração em rios
Viability of the use of the approximate delta method for determination of rearation coefficient in rivers
title Viabilidade da utilização do método delta aproximado para determinação do coeficiente de reaeração em rios
spellingShingle Viabilidade da utilização do método delta aproximado para determinação do coeficiente de reaeração em rios
Graepin, Cristiane
Qualidade da água
Oxigênio dissolvido
Matéria orgânica
Características hidrodinâmicas
Water quality
Dissolved oxygen
Organic matter
Hydrodynamic characteristics
CNPQ::ENGENHARIAS
title_short Viabilidade da utilização do método delta aproximado para determinação do coeficiente de reaeração em rios
title_full Viabilidade da utilização do método delta aproximado para determinação do coeficiente de reaeração em rios
title_fullStr Viabilidade da utilização do método delta aproximado para determinação do coeficiente de reaeração em rios
title_full_unstemmed Viabilidade da utilização do método delta aproximado para determinação do coeficiente de reaeração em rios
title_sort Viabilidade da utilização do método delta aproximado para determinação do coeficiente de reaeração em rios
author Graepin, Cristiane
author_facet Graepin, Cristiane
author_role author
dc.contributor.none.fl_str_mv Gastaldini, Maria do Carmo Cauduro
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4790803A8
Carissimi, Elvis
http://lattes.cnpq.br/4642912749433316
Pinheiro, Adilson
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4787528J1
dc.contributor.author.fl_str_mv Graepin, Cristiane
dc.subject.por.fl_str_mv Qualidade da água
Oxigênio dissolvido
Matéria orgânica
Características hidrodinâmicas
Water quality
Dissolved oxygen
Organic matter
Hydrodynamic characteristics
CNPQ::ENGENHARIAS
topic Qualidade da água
Oxigênio dissolvido
Matéria orgânica
Características hidrodinâmicas
Water quality
Dissolved oxygen
Organic matter
Hydrodynamic characteristics
CNPQ::ENGENHARIAS
description The dissolved oxygen is an important indicator that shows water quality variation in rivers, caused by the release/accumulation of organic matter. The determination of the reaeration coefficient is indispensable, due to the consumption of dissolved oxygen for the organic matter oxidation. The reaeration coefficient can be determined by empirical models or experimental methods. The experimental methods are generally expensive and slow. However, the Approximate Delta Method proposed by McBride and Chapra (2005) is an experimental method of easy application and low cost. This method is based on surface reaeration estimation, primary production, and respiration. Basically, it is estimated by means of daytime measurements of dissolved oxygen. The main gol was to analyze the application viability of the Approximate Delta Method to determine the reaeration coefficient in watershed. This study was carried out in five watersheds: Cancela-Tamandaí, Menino Deus II, Menino Deus IV, João Goulart and RSC 287. The reaeration coefficient is influenced by hydrodynamic characteristics of the rivers. Thus, the velocity, depth, and flow were monitored. It was determined the temperature of the water and the dissolved oxygen concentrations during the photoperiod, and it was estimated the organic load in the rivers. The application of the Approximate Delta Method was viable only in João Goulart and RSC 287 basins. The Cancela-Tamandaí basin does not presented an adequated dissolved oxygen profile. This was due to the high release of organic matter in the river. The Menino Deus II basin also presented unviability. This was due to the absence of an adequate dissolved oxygen profile. In the Menino Deus IV basin occurred overestimation of the coefficients, when was possible your estimation. In this basin, the minimum deficit in most of the dissolved oxygen profiles was before of the solar noon, avoided the application of the method. In João Goulart basin was viable the application of the method, but with some limitations: flows until 1.00 m3/s; there should be regular presence of organic load; and the time between the dissolved oxygen minimum deficit and the solar noon do not should be too low. The RSC 287 basin was viable in your normal hydrodynamic characteristics. The method was not viable with flow higher than 3.64 m3/s, and in the agriculture irrigation season. Finally, the Approximate Delta Method presented unviability in some conditions: flow greater than 1.00 m3/s for João Goulart basin, and then 3.64 m3/s in the RSC 287 basin; rivers with organic content very low or very high; low time between the dissolved oxygen minimum deficit and solar noon; low temperatures; and rivers with captation of the water. In the João Goulart basin, it was calculated the Pearson correlation coefficient between reaeration coefficient and the others variables. It was found significant correlation of the reaeration coefficient with the flow, depth, and velocity. However, the Approximate Delta Method showed experimentally to be easy to use and low cost. However, with a variety of limitations in its application, making it unviability to certain conditions.
publishDate 2016
dc.date.none.fl_str_mv 2016-07-08
2016-07-08
2016-03-28
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/masterThesis
format masterThesis
status_str publishedVersion
dc.identifier.uri.fl_str_mv GRAEPIN, Cristiane. VIABILITY OF THE USE OF THE APPROXIMATE DELTA METHOD FOR DETERMINATION OF REARATION COEFFICIENT IN RIVERS. 2016. 134 f. Dissertação (Mestrado em Engenharias) - Universidade Federal de Santa Maria, Santa Maria, 2016.
http://repositorio.ufsm.br/handle/1/7657
identifier_str_mv GRAEPIN, Cristiane. VIABILITY OF THE USE OF THE APPROXIMATE DELTA METHOD FOR DETERMINATION OF REARATION COEFFICIENT IN RIVERS. 2016. 134 f. Dissertação (Mestrado em Engenharias) - Universidade Federal de Santa Maria, Santa Maria, 2016.
url http://repositorio.ufsm.br/handle/1/7657
dc.language.iso.fl_str_mv por
language por
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dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Universidade Federal de Santa Maria
BR
Engenharia Ambiental
UFSM
Programa de Pós-Graduação em Engenharia Ambiental
publisher.none.fl_str_mv Universidade Federal de Santa Maria
BR
Engenharia Ambiental
UFSM
Programa de Pós-Graduação em Engenharia Ambiental
dc.source.none.fl_str_mv reponame:Manancial - Repositório Digital da UFSM
instname:Universidade Federal de Santa Maria (UFSM)
instacron:UFSM
instname_str Universidade Federal de Santa Maria (UFSM)
instacron_str UFSM
institution UFSM
reponame_str Manancial - Repositório Digital da UFSM
collection Manancial - Repositório Digital da UFSM
repository.name.fl_str_mv Manancial - Repositório Digital da UFSM - Universidade Federal de Santa Maria (UFSM)
repository.mail.fl_str_mv atendimento.sib@ufsm.br||tedebc@gmail.com
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