Uso do modelo qual2e no estudo da qualidade da água e da capacidade de autodepuração do Rio Araguari-AP (Amazônia)
Autor(a) principal: | |
---|---|
Data de Publicação: | 2006 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFG |
Texto Completo: | http://repositorio.bc.ufg.br/tede/handle/tde/593 |
Resumo: | The current investigation presents a characterization of the hydraulics and water quality of the medium course of the Araguari River, State of Amapá, Brazil, which has an approximate extension of 120 km. The Araguari River is the main water resource of the State of Amapá, located in the domains of the Amazon (the greatest tropical forest of the planet) in a region with great hydropower potential. In the studied river stretch, there is a hydropower generation station called Coaracy Nunes (UHECN), the first barrage build in the Amazon for electrical generation. A model for DO and BOD has been built with the help of the QUAL2E modeling system, developed by the United States Environmental Protection Agency. For this purpose, during one and a half year, field trips have been conducted with the intent of characterizing spacially and seasonally the hydraulics, kinetics and water quality of the Araguari River. The modeling stages involved model construction, sensitivity analisys and calibration. After model calibration, three hypothetic cenarios were simulated: (1) the introduction of a new barrage upstream of the UHECN; (2) municipal untreated wastewater inflow from Porto Grande and Ferreira Gomes into the waterbody, including populational growth, during the high flow period; (3) the same cenario as before but during the low flow period. The carbonaceous organic matter present in water hás shown to decompose, in average, in the first five days of incubation. The values obtained for the BOD first order reaction coefficient layed between 0,13 d-1 and 0,90 d-1. The reaeration coefficient, K2, estimated based on hydraulic characteristics, layed between 0,01 d-1 and 1,40 d-1. The results of the sample collections in the river stretch has shown that, amongst the parameters measured, the following were mostly altered: pH, electric conductivity, total solids, suspended solids, fecal coliforms, ammonium, nitrate, BOD and DO. Fecal coliforms, pH, nitrate and BOD were in disagreement with limits defined by Brazilian Legislation on water quality (CONAMA 357/2005). The river impoundment has shown not to significantly alter the DO and BOD concentrations, however, the same statement can not be made for other water characteristics. The water characteristics mostly altered by the UHECN were: hydraulic (flow, velocity, breadth, cross-sectional area) and water quality (pH, electric conductivity, water temperature, total solids, suspended solids, fecal coliforms, nitrate, chloride, BOD and DO). The simulated scenario with municipal untreated wastewater inflow from Porto Grande and Ferreira Gomes (including population growth) into the waterbody during low flow period showed the most critical results in terms of the water quality. The worst simulated situation happened in the dry period in which the river flows decreased significantly and so did the river dilution capacity. In this period the greatest OD depletion occurred and achieved concentrations bellow 4.0 mg/L, in disagreement with Brazilian Water Quality Legislation (CONAMA 357/2005). |
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SIQUEIRA, Eduardo Queija dehttp://lattes.cnpq.br/8130881429925800http://lattes.cnpq.br/3052075493147161BÁRBARA, Viníciu Fagundes2014-07-29T15:01:40Z2010-08-312006-12-12BÁRBARA, Viníciu Fagundes. Using the model QUAL2E in the study of water quality and self-purification capacity of Rio Araguari-AP (Amazon). 2006. 174 f. Dissertação (Mestrado em Engenharias) - Universidade Federal de Goiás, Goiânia, 2006.http://repositorio.bc.ufg.br/tede/handle/tde/593The current investigation presents a characterization of the hydraulics and water quality of the medium course of the Araguari River, State of Amapá, Brazil, which has an approximate extension of 120 km. The Araguari River is the main water resource of the State of Amapá, located in the domains of the Amazon (the greatest tropical forest of the planet) in a region with great hydropower potential. In the studied river stretch, there is a hydropower generation station called Coaracy Nunes (UHECN), the first barrage build in the Amazon for electrical generation. A model for DO and BOD has been built with the help of the QUAL2E modeling system, developed by the United States Environmental Protection Agency. For this purpose, during one and a half year, field trips have been conducted with the intent of characterizing spacially and seasonally the hydraulics, kinetics and water quality of the Araguari River. The modeling stages involved model construction, sensitivity analisys and calibration. After model calibration, three hypothetic cenarios were simulated: (1) the introduction of a new barrage upstream of the UHECN; (2) municipal untreated wastewater inflow from Porto Grande and Ferreira Gomes into the waterbody, including populational growth, during the high flow period; (3) the same cenario as before but during the low flow period. The carbonaceous organic matter present in water hás shown to decompose, in average, in the first five days of incubation. The values obtained for the BOD first order reaction coefficient layed between 0,13 d-1 and 0,90 d-1. The reaeration coefficient, K2, estimated based on hydraulic characteristics, layed between 0,01 d-1 and 1,40 d-1. The results of the sample collections in the river stretch has shown that, amongst the parameters measured, the following were mostly altered: pH, electric conductivity, total solids, suspended solids, fecal coliforms, ammonium, nitrate, BOD and DO. Fecal coliforms, pH, nitrate and BOD were in disagreement with limits defined by Brazilian Legislation on water quality (CONAMA 357/2005). The river impoundment has shown not to significantly alter the DO and BOD concentrations, however, the same statement can not be made for other water characteristics. The water characteristics mostly altered by the UHECN were: hydraulic (flow, velocity, breadth, cross-sectional area) and water quality (pH, electric conductivity, water temperature, total solids, suspended solids, fecal coliforms, nitrate, chloride, BOD and DO). The simulated scenario with municipal untreated wastewater inflow from Porto Grande and Ferreira Gomes (including population growth) into the waterbody during low flow period showed the most critical results in terms of the water quality. The worst simulated situation happened in the dry period in which the river flows decreased significantly and so did the river dilution capacity. In this period the greatest OD depletion occurred and achieved concentrations bellow 4.0 mg/L, in disagreement with Brazilian Water Quality Legislation (CONAMA 357/2005).A presente investigação apresenta uma caracterização hidráulica e da qualidade da água do médio curso do Rio Araguari (AP), em uma extensão de aproximadamente 120 km. O Rio Araguari, principal corpo hídrico do Estado do Amapá, está situado dentro dos domínios da Amazônia (a maior floresta tropical do planeta), em uma região com grande potencial hidrelétrico. No trecho em estudo, encontra-se implantada a Usina Hidrelétrica de Coaracy Nunes (UHECN), a primeira barragem edificada na Amazônia com fins de geração de energia elétrica. Foi desenvolvido um modelo de oxigênio dissolvido (OD) e de demanda bioquímica de oxigênio (DBO) com o auxílio do sistema de modelagem QUAL2E, desenvolvido pela Agência de Proteção Ambiental dos Estados Unidos (USEPA). Para isso, procedeu-se, durante um ano e meio, com expedições de campo que objetivaram caracterizar, espacialmente e sazonalmente, os parâmetros hidráulicos, cinéticos e de qualidade da água do Rio Araguari. As etapas da modelagem envolveram a construção, análise de sensibilidade e a calibração do modelo. Posteriormente efetuou-se, com o modelo calibrado, a simulação de três cenários hipotéticos na bacia: (1) a introdução de uma nova barragem a montante da UHECN; (2) o descarte de efluentes in natura oriundos dos municípios de Porto Grande e Ferreira Gomes (com crescimento populacional) nas águas do corpo hídrico (período de alta vazão); e (3) o mesmo cenário anterior, porém para a condição de baixas vazões. A matéria orgânica carbonácea presente na água desse rio decompõe-se, em média, nos primeiros cinco dias de incubação. Os valores obtidos experimentalmente para o coeficiente de deoxigenação, K1, ficaram compreendidos entre 0,13 d-1 e 0,90 d-1. O coeficiente de reaeração, K2, obtido com base nas características hidráulicas, ficaram compreendidos entre 0,01 d-1 a 1,40 d-1. Os resultados das campanhas amostrais mostraram que os parâmetros de qualidade da água que se apresentaram mais alterados no trecho em estudo foram: potencial hidrogeniônico, condutividade, sólidos totais, sólidos suspensos, coliformes termotolerantes, amônia, nitrato, demanda bioquímica de oxigênio e oxigênio dissolvido. Quando comparados com a Resolução 357/2005 do Conselho Nacional de Meio Ambiente (CONAMA), os parâmetros que mais infringiram esse instrumento jurídico foram: potencial hidrogeniônico, coliformes termotolerantes, nitrato e demanda bioquímica de oxigênio. A nova barragem não interfere significativamente as concentrações de OD e DBO do Rio Araguari, não se podendo fazer a mesma afirmação para os demais parâmetros de qualidade da água. As características que mais se alteraram devido à obra da UHECN foram: hidráulicas (vazão, velocidade, largura e área da seção transversal), e de qualidade da água (potencial hidrogeniônico, condutividade, temperatura da água, sólidos totais, sólidos suspensos, coliformes termotolerantes, nitrato, cloreto, demanda bioquímica de oxigênio e oxigênio dissolvido). O cenário simulado com o descarte nas águas do manancial de efluentes in natura dos municípios de Porto Grande e Ferreira Gomes, com o crescimento populacional, no período das baixas vazões, foi o mais desfavorável dentre os cenários investigados com relação à qualidade da água. A pior situação aconteceu na época das estiagens, em que as vazões do curso d água diminuem consideravelmente e, consequentemente, sua capacidade de diluição também. Neste período, ocorreu uma maior depleção do oxigênio dissolvido presente na água, que alcançou concentrações abaixo de 4,00 mg/L, vindo a infringir a Resolução 357/2005 do CONAMA.Made available in DSpace on 2014-07-29T15:01:40Z (GMT). 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dc.title.por.fl_str_mv |
Uso do modelo qual2e no estudo da qualidade da água e da capacidade de autodepuração do Rio Araguari-AP (Amazônia) |
dc.title.alternative.eng.fl_str_mv |
Using the model QUAL2E in the study of water quality and self-purification capacity of Rio Araguari-AP (Amazon) |
title |
Uso do modelo qual2e no estudo da qualidade da água e da capacidade de autodepuração do Rio Araguari-AP (Amazônia) |
spellingShingle |
Uso do modelo qual2e no estudo da qualidade da água e da capacidade de autodepuração do Rio Araguari-AP (Amazônia) BÁRBARA, Viníciu Fagundes Rio Araguari Amazônia QUAL2E hidrelétrica 1.Qualidade da água - Rio Araguari, AP 2.Engenharia Araguari River Amazon QUAL2E hydropower station CNPQ::ENGENHARIAS::ENGENHARIA SANITARIA::RECURSOS HIDRICOS |
title_short |
Uso do modelo qual2e no estudo da qualidade da água e da capacidade de autodepuração do Rio Araguari-AP (Amazônia) |
title_full |
Uso do modelo qual2e no estudo da qualidade da água e da capacidade de autodepuração do Rio Araguari-AP (Amazônia) |
title_fullStr |
Uso do modelo qual2e no estudo da qualidade da água e da capacidade de autodepuração do Rio Araguari-AP (Amazônia) |
title_full_unstemmed |
Uso do modelo qual2e no estudo da qualidade da água e da capacidade de autodepuração do Rio Araguari-AP (Amazônia) |
title_sort |
Uso do modelo qual2e no estudo da qualidade da água e da capacidade de autodepuração do Rio Araguari-AP (Amazônia) |
author |
BÁRBARA, Viníciu Fagundes |
author_facet |
BÁRBARA, Viníciu Fagundes |
author_role |
author |
dc.contributor.advisor1.fl_str_mv |
SIQUEIRA, Eduardo Queija de |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/8130881429925800 |
dc.contributor.authorLattes.fl_str_mv |
http://lattes.cnpq.br/3052075493147161 |
dc.contributor.author.fl_str_mv |
BÁRBARA, Viníciu Fagundes |
contributor_str_mv |
SIQUEIRA, Eduardo Queija de |
dc.subject.por.fl_str_mv |
Rio Araguari Amazônia QUAL2E hidrelétrica 1.Qualidade da água - Rio Araguari, AP 2.Engenharia |
topic |
Rio Araguari Amazônia QUAL2E hidrelétrica 1.Qualidade da água - Rio Araguari, AP 2.Engenharia Araguari River Amazon QUAL2E hydropower station CNPQ::ENGENHARIAS::ENGENHARIA SANITARIA::RECURSOS HIDRICOS |
dc.subject.eng.fl_str_mv |
Araguari River Amazon QUAL2E hydropower station |
dc.subject.cnpq.fl_str_mv |
CNPQ::ENGENHARIAS::ENGENHARIA SANITARIA::RECURSOS HIDRICOS |
description |
The current investigation presents a characterization of the hydraulics and water quality of the medium course of the Araguari River, State of Amapá, Brazil, which has an approximate extension of 120 km. The Araguari River is the main water resource of the State of Amapá, located in the domains of the Amazon (the greatest tropical forest of the planet) in a region with great hydropower potential. In the studied river stretch, there is a hydropower generation station called Coaracy Nunes (UHECN), the first barrage build in the Amazon for electrical generation. A model for DO and BOD has been built with the help of the QUAL2E modeling system, developed by the United States Environmental Protection Agency. For this purpose, during one and a half year, field trips have been conducted with the intent of characterizing spacially and seasonally the hydraulics, kinetics and water quality of the Araguari River. The modeling stages involved model construction, sensitivity analisys and calibration. After model calibration, three hypothetic cenarios were simulated: (1) the introduction of a new barrage upstream of the UHECN; (2) municipal untreated wastewater inflow from Porto Grande and Ferreira Gomes into the waterbody, including populational growth, during the high flow period; (3) the same cenario as before but during the low flow period. The carbonaceous organic matter present in water hás shown to decompose, in average, in the first five days of incubation. The values obtained for the BOD first order reaction coefficient layed between 0,13 d-1 and 0,90 d-1. The reaeration coefficient, K2, estimated based on hydraulic characteristics, layed between 0,01 d-1 and 1,40 d-1. The results of the sample collections in the river stretch has shown that, amongst the parameters measured, the following were mostly altered: pH, electric conductivity, total solids, suspended solids, fecal coliforms, ammonium, nitrate, BOD and DO. Fecal coliforms, pH, nitrate and BOD were in disagreement with limits defined by Brazilian Legislation on water quality (CONAMA 357/2005). The river impoundment has shown not to significantly alter the DO and BOD concentrations, however, the same statement can not be made for other water characteristics. The water characteristics mostly altered by the UHECN were: hydraulic (flow, velocity, breadth, cross-sectional area) and water quality (pH, electric conductivity, water temperature, total solids, suspended solids, fecal coliforms, nitrate, chloride, BOD and DO). The simulated scenario with municipal untreated wastewater inflow from Porto Grande and Ferreira Gomes (including population growth) into the waterbody during low flow period showed the most critical results in terms of the water quality. The worst simulated situation happened in the dry period in which the river flows decreased significantly and so did the river dilution capacity. In this period the greatest OD depletion occurred and achieved concentrations bellow 4.0 mg/L, in disagreement with Brazilian Water Quality Legislation (CONAMA 357/2005). |
publishDate |
2006 |
dc.date.issued.fl_str_mv |
2006-12-12 |
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2010-08-31 |
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2014-07-29T15:01:40Z |
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BÁRBARA, Viníciu Fagundes. Using the model QUAL2E in the study of water quality and self-purification capacity of Rio Araguari-AP (Amazon). 2006. 174 f. Dissertação (Mestrado em Engenharias) - Universidade Federal de Goiás, Goiânia, 2006. |
dc.identifier.uri.fl_str_mv |
http://repositorio.bc.ufg.br/tede/handle/tde/593 |
identifier_str_mv |
BÁRBARA, Viníciu Fagundes. Using the model QUAL2E in the study of water quality and self-purification capacity of Rio Araguari-AP (Amazon). 2006. 174 f. Dissertação (Mestrado em Engenharias) - Universidade Federal de Goiás, Goiânia, 2006. |
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http://repositorio.bc.ufg.br/tede/handle/tde/593 |
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Universidade Federal de Goiás |
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Mestrado em Engenharia do Meio Ambiente |
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UFG |
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Engenharias |
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