A micro-bacia do córrego Banguelo da sub-bacia Bom Jesus contribui, junto com outras, para formação do reservatório da Pampulha, cuja poluição é considerada um dos grandes problemas ambientais do município de Belo Horizonte. O presente trabalho teve como objetivo avaliar o efeito do uso e ocupação do solo na qualidade da água num ciclo sazonal em diferentes pontos da micro-bacia. Para o monitoramento da qualidade da água, os parâmetros analisados foram: pH, turbidez, oxigênio dissolvido, fosfato, nitrato, nitrogênio total, temperatura, DBO 5 , DQO, sólidos totais e coliformes termotolerantes. Foi realizado, ainda, um levantamento florístico e das condições de ocupação do solo nas margens do córrego. A partir dos resultados do monitoramento, foram calculados os índices de qualidade da água (IQA NSF ) e identificados os pontos com maior grau de poluição. A análise do IQA indicou que a qualidade da água oscilou entre média e ruim no período seco, tendo-se observado a melhoria da qualidade da água para boa e média no período chuvoso. A deterioração da qualidade das águas ocorreu devido ao lançamento de efluente industrial e esgoto das áreas urbanizadas, com ocorrência de níveis baixos de oxigênio dissolvido, alta concentração de matéria orgânica e nutrientes. Nas áreas com vegetação, observou-se diminuição na concentração de poluentes (principalmente nitrato e fosfato), indicando a importância da manutenção da vegetação ripária como medida de melhoria da qualidade das águas na região. A minimização da poluição neste córrego pode melhorar a qualidade da água da sub-bacia e, consequentemente, contribuir para deseutrofização do reservatório da Pampulha. Palavras-chave:Qualidade da água, uso e ocupação do solo, índice de qualidade da água. ABSTRACTThe Banguelo creek micro-basin, in the sub-basin Bom Jesus contributes for the formation of Pampulha reservoir, along with other contributors. The pollution in this reservoir is considered one of the major environmental problems of the city of Belo Horizonte. This paper evaluated the effect of land use and occupation in Banguelo Creek on its water quality, considering the seasonal cycle in several points of the micro-basin. The PONTES, P. P.; MARQUES, A. R.; MARQUES, G. F. Efeito do uso e ocupação do solo na qualidade da água na micro-bacia do Córrego Banguelo -Contagem. Ambi-Agua, Taubaté, v. 7, n. 3, p. 183-194, 2012. (http://dx.doi.org/10.4136/ambi-agua.962) 184 analyzed parameters for monitoring the water quality were: pH, turbidity, dissolved oxygen, phosphate, nitrate, total nitrogen, temperature, BOD 5 , COD and thermotolerant coliforms. The results were analyzed based on a floristic survey and on land occupation conditions in the micro-basin. Water quality index (WQI NSF ) was calculated and the points with the highest degree of pollution were identified. Analysis of WQI indicated that the water quality fell in the classes "average" and "bad" during dry season, with improvement for "good" and "average" in the rainy season. The deterioration of water quality was attrib...

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In this paper we synthesize the special sessions of the XXIII Brazilian Water Resources Symposium 2019 in order to understand the major advances and challenges in the water sciences in Brazil. We analyzed more than 250 papers and presentations of 16 special sessions covering topics of Climate Variability and Change, Disasters, Modeling, Large Scale Hydrology, Remote Sensing, Education, and Water Resources Management. This exercise highlighted the unique diversity of natural and human water features in Brazil, that offers a great opportunity for understanding coupled hydrological and societal systems. Most contributions were related to methods and the quantification of water phenomena, therefore, there is a clear necessity for fostering more research on phenomena comprehension. There is a vast network of co-authorship among institutions but mostly from academia and with some degree of regional fragmentation. The ABRhidro community now has the challenge to enhance its collaboration network, the culture of synthesis analysis, and to build a common agenda for water resources research. It is also time for us to be aligned with the international water science community and to use our experiences to actively contribute to the tackling of global water issues.

Abstract. Many river basins throughout the world are increasingly under pressure as water demands keep rising due to population growth, industrialization, urbanization and rising living standards. In the past, the typical answer to meet those demands focused on the supply-side and involved the construction of hydraulic infrastructures to capture more water from surface water bodies and from aquifers. As river basins were being more and more developed, downstream water users and ecosystems have become increasingly dependent on the management actions taken by upstream users. The increased interconnectedness between water users, aquatic ecosystems and the built environment is further compounded by climate change and its impact on the water cycle. Those pressures mean that it has become increasingly important to measure and account for changes in water fluxes and their corresponding economic value as they progress throughout the river system. Such basin water accounting should provide policy makers with important information regarding the relative contribution of each water user, infrastructure and management decision to the overall economic value of the river basin. This paper presents a dynamic water accounting approach whereby the entire river basin is considered as a value chain with multiple services including production and storage. Water users and reservoirs operators are considered as economic agents who can exchange water with their hydraulic neighbours at a price corresponding to the marginal value of water. Effective water accounting is made possible by keeping track of all water fluxes and their corresponding hypothetical transactions using the results of a hydro-economic model. The proposed approach is illustrated with the Eastern Nile River basin in Africa.

Several phenotypic differences observed in Parkinson’s disease (PD) patients have been linked to age at onset (AAO). We endeavoured to find out whether these differences are due to the ageing process itself by using a combined dataset of idiopathic PD (n = 430) and healthy controls (HC; n = 556) excluding carriers of known PD-linked genetic mutations in both groups. We found several significant effects of AAO on motor and non-motor symptoms in PD, but when comparing the effects of age on these symptoms with HC (using age at assessment, AAA), only positive associations of AAA with burden of motor symptoms and cognitive impairment were significantly different between PD vs HC. Furthermore, we explored a potential effect of polygenic risk score (PRS) on clinical phenotype and identified a significant inverse correlation of AAO and PRS in PD. No significant association between PRS and severity of clinical symptoms was found. We conclude that the observed non-motor phenotypic differences in PD based on AAO are largely driven by the ageing process itself and not by a specific profile of neurodegeneration linked to AAO in the idiopathic PD patients.

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Adoption of best soil and water management practices is desirable for sustainable production intensification. However, farmers have difficulties in adopting them within a system approach to management, missing out on positive results for themselves and for society. A partnership between the Brazilian No-Till Farmers Federation and Itaipu Binacional authority adopted a participatory management strategy, as proposed by the National Water Resources Policy, allowing important decisions regarding the use of water to be made in participatory Watershed Committees, to address such farmers’ difficulties. In this paper, we review the development and application of the Participatory Quality Index approach based on the principles of conservation agriculture to improve the quality of no-till systems in the Paraná 3 watershed within the Cultivating Good Water program. We analyze the available documentation and experiences of the program’s executors, highlighting the results from the perspective of sustainability of multiple uses of water in a watershed.

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