Análise Qualitativa e Toxicológica de uma Floração de Cianobactérias na Lagoa do Gambá em Ouro Preto, MG, e uma Síntese da Ocorrência de Florações de Cianobactérias no Brasil

Freitas, T. Carvalho de; Sant'Anna, Eneida Maria Eskinazi; Guedes, Claudia Dumans; Ferreira, Tanare C. R.; Guarda, Vera Lúcia de Miranda; Jardim, Fernando Antônio

doi:10.21168/rbrh.v17n3.p17-28

Cited by 3 publications

(2 citation statements)

References 25 publications

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“…The treatment of sewage is still inadequate, with only 51.2% of the generated sewage being treated [82]. Many municipalities either do not treat sewage or only provide a partial treatment [85,86], resulting in the direct discharge of untreated sewage into rivers. Solid waste management remains a significant challenge, too, with 24.9% of the generated waste still being disposed of in dumpsites [87].…”

Section: Wes Nexus Challenges In Brazilmentioning

confidence: 99%

An Experiment in Transdisciplinary Systems Mapping: Architecture and the Water–Energy–Sanitation Nexus in Brazil

Castro,

Valencio,

Iossifova

et al. 2024

Architecture

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Urban environments contain and are part of a wide range of interconnected complex systems, including infrastructures and services. Rapid and often uncontrolled urbanization triggers distributive inequities and environmental injustices, posing urgent and interconnected challenges that demand inter- and transdisciplinary solutions. Despite architecture’s commitment to ‘sustainability’, its central role in urban systems and their dynamics as well as the discipline’s intersections with other disciplines remain relatively little explored. In this contribution, we focus on the water–energy–sanitation (WES) nexus in Brazil, drawing from transdisciplinary workshops, scoping reviews, and systems mapping. We propose a framework for the analysis of urban nexuses. This framework builds on transdisciplinary systems mapping for the identification of nexus components, nodes, and their interconnections. Our findings indicate that a nexus perspective allows us to identify challenges in urban nexuses, productive intersections with the knowledge and approaches from other disciplines, and possible solutions in collaboration with non-academic stakeholders. We advocate for an expanded professional field and a redefined sense of responsibility within the discipline.

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Section: Wes Nexus Challenges In Brazilmentioning

confidence: 99%

An Experiment in Transdisciplinary Systems Mapping: Architecture and the Water–Energy–Sanitation Nexus in Brazil

Castro,

Valencio,

Iossifova

et al. 2024

Architecture

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“…This may serve as a basis to related studies. For example, to the prediction of the occurrence in Guaíba of flowering of potentially toxic cyanobacteria that cause deterioration of water quality and risks to human health (FREITAS et al, 2012;CORAZZA, 2015).…”

Section: Introductionmentioning

confidence: 99%

Temperature Surface of Guaíba Lake, RS, from time series of MODIS images

Luz

Guasselli

Rocha

2017

RBRH

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The Guaíba lake is located in an area of complex weather variation and is influenced by many atmospheric circulation systems, bringing about violent occluded fronts, and, sometimes, intense precipitation. In Rio Grande do Sul, during El Niño, air temperatures and the precipitation index are higher, contrary to La Niña. Moreover, the Guaíba Lake receives water from the Guaíba's Hydrographical Region, which corresponds to 1/3 of Rio Grande do Sul State, and is thus an important water body to the metropolitan region of Porto Alegre. Methods that seek to understand the behavior of Guaíba lake surface water temperature (LSWT) may lead to relevant information to identify periods of more or less water warming, as well as the relations between LSWT, water quality deterioration and risks to human health. This paper aims to comprehend the behavior of Guaíba LSWT during periods of climatic anomalies (El Niño/La Niña). Therefore, 418 sea surface temperature (SST) images from the MODIS sensor were processed with SeaDas 7.2 software. The quarterly averages of LSWT were obtained and compared to the climatological anomalies in Equatorial Pacific Ocean. LSWT behavior is more complex in El Niño/La Niña periods. The results show that during climatic abnormality periods there are no direct relationship between the warming/cooling of Guaíba LSWT and the warming/cooling of Equatorial Pacific Ocean's SST. The precipitation indices were more significant to the behavior of LSWT during El Niño periods, but for all periods (of climatic normality and abnormality), air temperature is what most influences LSWT. This relation occurs with climatic factors of water retention time, water entry and precipitation, and air temperature. There is a major correspondence during La Niña periods with the cooling of Guaíba LSWT only for some years. On the other hand, during El Niño periods there are no correspondences of this phenomenon with the warming of Guaíba LSWT. There are only more intense oscillations in surface temperatures than during regular and La Niña periods, but with a tendency to LSWT warming. Keywords: El Niño; La Niña; Remote sensing. RESUMOO Lago Guaíba localiza-se em uma área de complexa variação de tempo meteorológico, e sofre influência de vários sistemas atmosféricos ocasionando choques frontais e por vezes precipitações intensas. No Estado, durante o El Niño, as temperaturas do ar são mais elevadas e o índice pluviométrico é maior, de modo contrário à La Niña. Além disso recebe águas da Região Hidrográfica do Guaíba, o que corresponde a 1/3 do Estado do Rio Grande do Sul, constituindo-se em importante corpo d'água para a região metropolitana de Porto Alegre. Métodos que buscam a compreensão do comportamento da TSL (temperatura de superfície de lago) do Guaíba podem trazer informações relevantes para identificação de períodos de maior e menor aquecimento da água, assim como as relações entre TSL e deterioração da qualidade da água e riscos a saúde humana. Esse trabalho tem como objetivo compreender o comportamento da TSL do ...

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Análise do consumo de cloro para oxidação da espécie de cianobactéria Microcystis aeruginosa

et al. 2018

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Este estudo avaliou o consumo de cloro da espécie Microcystis aeruginosa presente nas florações em mananciais de abastecimento, pois a legislação exige a manutenção mínima de 0,2 mg.L-1 de cloro residual livre ou 2 mg.L-1 de cloro residual combinado e um residual de 3 a 5 mg.L-1 após 7 dias. Em escala de laboratório realizaram-se análises com cloro gasoso: 8 doses para ensaios de 30 minutos e 24 horas; e outras 7 para ensaios de 7 dias. Os resultados, em média, demonstraram alto consumo de cloro, podendo ter relação com a formação de subprodutos da cloração no tratamento de água.

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Análise Qualitativa e Toxicológica de uma Floração de Cianobactérias na Lagoa do Gambá em Ouro Preto, MG, e uma Síntese da Ocorrência de Florações de Cianobactérias no Brasil

Cited by 3 publications

References 25 publications

An Experiment in Transdisciplinary Systems Mapping: Architecture and the Water–Energy–Sanitation Nexus in Brazil

An Experiment in Transdisciplinary Systems Mapping: Architecture and the Water–Energy–Sanitation Nexus in Brazil

Temperature Surface of Guaíba Lake, RS, from time series of MODIS images

Análise do consumo de cloro para oxidação da espécie de cianobactéria Microcystis aeruginosa

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