scholarly journals Influence of the Rio Taquaraçu in the water quality of the Rio das Velhas: subsidies for reflections of the case of water shortage in Belo Horizonte metropolitan region - MG, Brazil

RBRH ◽  
2016 ◽  
Vol 21 (2) ◽  
pp. 429-438 ◽  
Author(s):  
Isabela Torres ◽  
Rodrigo Lemos ◽  
ANTÔNIO JUNIOR
2018 ◽  
Vol 15 (30) ◽  
pp. 75-86
Author(s):  
C. C. PINTO ◽  
K. B. ALMEIDA ◽  
S. C. OLIVEIRA

This study presents an evaluation of the water quality variability of 19 monitoring stations located in the channel of the Velhas river, using multivariate statistical techniques - Cluster Analysis (CA) and Principal Component Analysis/Factor Analysis (PCA/FA). Sixteen physical-chemical parameters were evaluated between January 2009 and June 2016, totalizing 27,232 valid observations. The CA grouped the nineteen monitoring stations into three groups based on the pollution levels. The PCA/FA resulted in six latent factors for group 1, four for group 2 and five for group 3, accounting for 71.44%, 65.32% and 61.69% of the total variance in the respective water quality. The factors indicated that the parameters responsible for the variations in water quality are mainly related to the release of sanitary sewage and industrial effluents and also to agriculture and livestock activities. These results reflect different water quality conditions of the Velhas River in its extension but, in fact, it is verified a greater variability of the water in the Metropolitan Region of Belo Horizonte and its downstream, justified by the different loads of pollutants received in this region, mainly the releases of domestic sewage and industrial effluents.


GeoTextos ◽  
2021 ◽  
Vol 17 (1) ◽  
Author(s):  
Guilherme Eduardo Macedo Cota ◽  
Antônio Pereira Magalhães Júnior

<p>O presente trabalho objetiva investigar as lacunas legais no tocante à segurança de barragens de rejeito de minério nas bacias de contribuição dos mananciais que abastecem a Região Metropolitana de Belo Horizonte (RMBH), evidenciando suas implicações para a manutenção da quantidade e da qualidade das águas. Por conseguinte, é elaborado um panorama das barragens da bacia do Alto Rio das Velhas em termos espaciais e legais, principalmente quanto à conformidade em relação à Política Nacional de Segurança de Barragens (PNSB). Os resultados obtidos mostram uma série de lacunas nos aspectos legais das estruturas, sobretudo no tocante à estabilidade dos barramentos, cenário que, por sua vez, compromete a segurança hídrica dos mananciais e o abastecimento de água da RMBH.</p><p><span>Abstract</span></p><p>SCENERY OF ORE TAILINGS DAMS IN THE QUADRILÁTERO FERRÍFERO “IRON QUADRANGLE” (MG) AND IMPLICATIONS FOR WATER SECURITY IN THE METROPOLITAN REGION OF BELO HORIZONTE, MINAS GERAIS STATE, BRAZIL</p><p>This paper aims to investigate the legal gaps regarding the safety of ore tailings dams in the contribution basins of the water sources that supply the Metropolitan Region of Belo Horizonte, highlighting their implications for maintaining the quantity and quality of water. In this context is featured an overview of the spatial distribution and legal aspects of the dams in the Upper Velhas River basin, involving their compliance with the National Dam Safety Politics (PNSB). The results show many legal gaps, especially regarding the structural stability, which, in turn, compromises the water resources security and the regional water supply processes.</p>


2020 ◽  
Vol 9 (7) ◽  
pp. e440974246
Author(s):  
Raíssa de Assis Carvalho ◽  
Ana Carolina Ribeiro ◽  
Clara Mariana Lima ◽  
Wallace Pereira da Silva Mariz ◽  
Luana Sousa Silva ◽  
...  

Honey for human consumption must be processed under satisfactory conditions of Good Manufacturing Practices and not contain extraneous matters or microbiological contamination. However, several studies have shown that a high percentage of honey samples from different regions of Brazil are not adequate in terms of food safety. In this sense, this work aimed to evaluate the microbiological, microscopic, and physicochemical quality of uninspected honey samples marketed in the metropolitan region of Belo Horizonte, Brazil. Thirty honey samples (n= 30) were collected, and total coliforms, total fungi, extraneous matter and filth, moisture content, Aw, pH, total titratable acidity, Lugol test, and 5-hydroxymethylfurfural (5-HMF) were analyzed. Filamentous fungi were also isolated and identified at the gender level. Rodent hair and ants were found in the samples, indicating health risk for consumers. The data obtained demonstrated that 56.7% of the samples were adulterated. All positive samples in the Lugol test also presented starch granules in the microscopic evaluation, suggesting adulteration by the addition of sugar cane or corn starch syrup. No sample showed the presence of coliforms, and the total fungal count can be considered low. Cladosporium spp., Penicillium spp., and Aspergillus spp. were the principal genera of filamentous fungi isolated. High 5-HMF values were found, mainly in the adulterated samples. The data obtained will be reported to the competent authorities, since such products of unknown composition are being commercialized, offering risks to consumers' health.


1995 ◽  
Vol 24 (4) ◽  
pp. 249-254
Author(s):  
Tsuneya TSUCHINAGA ◽  
Munetaka ISHIKAWA ◽  
Genta UNO ◽  
Michio NAGAI
Keyword(s):  

2017 ◽  
Vol 14 (28) ◽  
pp. 23-29
Author(s):  
Helena Maria Andrade ALVES ◽  
Cristina Yassuko YAMANAKA ◽  
Miguel Angel Lobo AZCONA ◽  
Valter Alexandre BRASIL ◽  
Rui Jesus Lorenzo GARCIA ◽  
...  

Since 2011, the Centro de Pesquisas e Desenvolvimento - CEPED performs sampling and analysis activities of the waters of the springs that supply the city of Salvador to assess the Water Quality Index (WQI). The WQI is an important indicator of the relationship between use and land cover and water quality in a watershed. The purpose of this paper is to present a study of water quality of rivers Paraguaçu, Joanes, Jacuípe, Ipitanga, which are responsible for the water supply for the population of metropolitan region of Salvador with more than three million inhabitants and highest population density Northeast North. Through this study we can conclude that there is a decrease in water quality in nearby points of urbanized areas due to lack of sanitation, as well as in areas where there is impairment of riparian vegetation cover.


2022 ◽  
Vol 82 ◽  
Author(s):  
L. P. Martins ◽  
J. Sampaio ◽  
R. S. Godoi ◽  
L. K. Vargas ◽  
F. R. Silva ◽  
...  

Abstract The Gravataí River basin, one of the main water sources of the metropolitan region of Porto Alegre, is among the ten most polluted rivers in Brazil. Water quality is monitored only through physico-chemical and microbiological parameters in Brazil, and in this context, considering the importance of the use of biomarkers in complementing the analysis of water, the present study aimed to evaluate the environmental quality of the main affluent of the Gravataí River, Demetrio stream, through physico-chemical, microbiological, and cytogenotoxic criteria, at the stream source (P1), whereas samples P2 and P3 were obtained from the upstream near the area with the highest urban density and the downstream near the meeting point with the Gravataí River, respectively. The results for copper concentration and color classified the Demetrio stream as Class 4 in general, that is, the water is suitable only for navigation and to landscape harmony. The main genotoxic alterations (micronuclei and nuclear buds) were observed in P2, in which were obtained the highest levels of copper, in addition to iron and manganese. Anthropic interventions were observed in P1 and P2; however, due to its low metal concentration, P3, near the Gravataí River, manifested an improvement in environmental quality.


Sign in / Sign up

Export Citation Format

Share Document