Análise crítica por comparação entre modelos de qualidade de água aplicados em rios poluídos: contribuições à saúde, água e saneamento

Cunha, Cynara de Lourdes da Nóbrega; Ferreira, Aldo Pacheco

doi:10.1590/s1413-41522019112332

Cited by 6 publications

(4 citation statements)

References 12 publications

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“…It is important to remember that the adjustments to the Streeter-Phelps models and to the improved DO-BOD model, in this study, were made considering only experimental data on the dissolved oxygen variable. Another aspect is that we opted for analytical solutions of the expressions, although Cunha et al (2019) remember the essential correlation of dissolved oxygen in the decomposition of organic matter.…”

Section: Resultsmentioning

confidence: 99%

Mathematical modeling in the Urumari micro-watershed using Streeter-Phelps mathematical models and the enhanced Do-Bod model

Moura

Lopes

Ribeiro

et al. 2020

RICA

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When a certain load of pollutants is dumped in urban surface waters, the natural hydrological parameters are altered and a consequent dispersion of a contaminant occurs. Water self-purification is a natural recovery mechanism that aims to restore the natural parameters of water quality. In the municipality of Santarém, the Urumari micro-watershed, one of the main urban streams and a tributary of the Amazon river, suffers from increasing degradation. Thus, it is necessary to systematically monitor the water quality of the micro-watershed, through mathematical modeling, in order to identify environmental impairment and propose mitigating tools that facilitate self-purification capacity. The aim of this work was to evaluate the degree of disturbance of the Urumari micro-watershed using Streeter-Phelps mathematical models and the Enhanced DO-BOD model. The software Curve Expert 1.4 was used to adjust the coefficients of the mathematical models, using the Levenberg-Marquardt nonlinear function adjustment method. The complete mathematical model of DO and BOD considered the parcels of punctual deficit, microbial BOD, nitrification, sediment demand, photosynthesis and respiration. Three coefficients of the Streeter-Phelps model and six coefficients of the Enhanced DO-BOD model were adjusted according to the experimental data of dissolved oxygen and water travel time. The mathematical models satisfactorily correlated the experimental data. The values of the correlation coefficient, mean absolute deviations and quadratic deviations are for the Streeter-Phelps model and the Enhanced DO-BOD model, respectively. The Streeter-Phelps model presented the best correlation to the experimental data with the values of R2 equal to 0.83; mean absolute deviation equal to 0.56 and quadratic deviations equal to 4.98.

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Section: Resultsmentioning

confidence: 99%

Mathematical modeling in the Urumari micro-watershed using Streeter-Phelps mathematical models and the enhanced Do-Bod model

Moura

Lopes

Ribeiro

et al. 2020

RICA

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“…Legner (2023/2024) also refers to this type of water served as 'filthy' and contains, in addition to detergent chemicals, organic matter (MO). This MO, in the view of Cunha and Ferreira (2019), is one of the causes of so-called sanitary pollution because it increases the rates of diseases caused by water circulation as the diarrhea conditions in consumers of this water. In relation to aquatic fauna, it is noted the presence of emerse plants of the genus Eichhornia, family Pontederiaceae and other whose vernacular name, according to the residents of this set, is reed (Figure 9b).…”

Section: B C Amentioning

confidence: 99%

Preliminary analysis of the environmental conditions of Igarapé Paragominas, southeast of Pará

Pereira Júnior,

Morales,

Beltrão

et al. 2023

Cad. Pedagógico

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Urban streams can undergo changes in environmental conditions from disorderly urban growth and the deployment of road platforms on their banks, interconnecting or pervading them. The objective of this research was to analyze the environmental conditions (infrastructure, APP, water body, fauna and aquatic flora) of the Paragominas Igarapé, in the urban stretch, to identify if the process of urbanization and the construction of the highway PA -125, represent negative actions that may be associated with the quality of the water body. The method used was that of exploratory research, with obtaining primary in situ and secondary data in specific literature (articles, dissertations, theses, studies concluding courses and e-books), as well as pioneering articles (1995-1998). The data obtained and analyzed indicated that the two causes analyzed caused harmful and almost irreversible effects, since they altered the natural flow of the Paragominas stream, the loss and replacement of the riparian forest in natura, as well as the construction of bridges and architectural units and the directing of the drainage of domestic and rainy effluents towards the interior of the lake, modifying the flora and the aquatic fauna. The information contained here may help to monitor environmental conditions, especially the Green lake, an important landscaping and local leisure site, as well as the urban extension of Igarapé Paragominas.

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“…In order to better understand the relationship between water quantity and quality, the mathematical modeling of water quality is as an important tool for carrying out a diagnosis of the current situation of the watercourse, as well as of its use to present prognosis of wastewater treatment and its impacts on the water quality of the studied basin, being increasingly used by managers as an aid to decision-making, gradually becoming a tool of great relevance, due to the importance of water and sanitation, regarding the treatment of effluents (Antunes et al, 2018;Macedo et al, 2018;Cunha and Ferreira, 2019;Bai et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Water quality modeling in the Paraibuna River in Juiz de Fora/MG: diagnosis and prognosis

Dutra

Fia

Ribeiro

2022

Rev. Bras. Ciênc. Ambient.

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To support the implementation of instruments of the National Water Resources Policy, as well as the new legal framework for basic sanitation, the environmental assessment of water courses becomes important to guide the planning, monitoring and management of a watershed. Thus, this research aims to contribute to the creation of information structures about the Paraibuna River and its water basin in the central and more urbanized region of Juiz de Fora/MG. The QUAL2K model was used considering two different hydrological periods. The study considered water quality data for the following variables: dissolved oxygen, biochemical oxygen demand, temperature, electrical conductivity and pH. The flow rates in the Paraibuna River and its tributaries were quantified using an Acoustic Doppler Current Profile (ADCP) and a hydrometric windmill. With the calibrated model, future water quality scenarios were simulated for the moment when the new sewage treatment plants are operating at maximum capacity, in accordance with the Juiz de Fora’s Municipal Plan for Basic Sanitation Service. The results show that the Paraibuna River, in the central section of Juiz de Fora, provided data with reduced water quality, mainly in the dry season, leading us to conclude that the flow had a direct influence on the water quality. As for the simulated scenarios, we reached the conclusion that the best result obtained for the sewage treatment of the Paraibuna River will be achieved when the treatment conditions of scenario 3 are applied. This scenario includes the Wastewater Treatment Plants of União Indústria, Santa Luzia, and the renovation of the Wastewater Treatment Plant of Barbosa Laje, with an expected reduction of 90% of the polluting load in the streams covered by the present work, and a reduction of 50% of the organic load upstream of the section under study.

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Análise crítica por comparação entre modelos de qualidade de água aplicados em rios poluídos: contribuições à saúde, água e saneamento

Cited by 6 publications

References 12 publications

Mathematical modeling in the Urumari micro-watershed using Streeter-Phelps mathematical models and the enhanced Do-Bod model

Mathematical modeling in the Urumari micro-watershed using Streeter-Phelps mathematical models and the enhanced Do-Bod model

Preliminary analysis of the environmental conditions of Igarapé Paragominas, southeast of Pará

Water quality modeling in the Paraibuna River in Juiz de Fora/MG: diagnosis and prognosis

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