Estudo da influência do meio físico e das atividades antrópicas na qualidade da água na sub-bacia do córrego Palmital- Viçosa/MG

• Autor(a) principal: Andrade, Luana Caetano Rocha de
• Data de Publicação: 2010
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://locus.ufv.br/handle/123456789/3723
• topic: Qualidade da água; Bacia hidrográfica; Pedologia; Water quality; Watershed; Pedology; CNPQ::ENGENHARIAS::ENGENHARIA CIVIL::GEOTECNICA

The increasing demand for water resources and the intense degradation of surface water and groundwater are some of the major concerns of society. It is known that several factors influence the water’s quality and they can be natural or man-made. It is also known that water resources conservation must be addressed in a comprehensive manner, covering all environmental compartments. In this context, this paper presents an integrated assessment of water quality of a sub-basin located in rural Viçosa / MG, based on the foundation established by the Federal Law n°. 9433/97 and in the State Law n° 13.199/97 of Minas Gerais. For this matter, a general characterization of the study area was made, covering the: water quality of ten wells and seven springs in order to evaluate, respectively, the quality of surface water and groundwater. Human activities; soil use; and geological and pedological studies were also carried out. In order to characterize water quality, samples were monthly collected and analysed in the period between May and December 2009, that were analyzed twenty-three parameters, highlighting: turbidity, color, pH, fecal coliform (E.coli), BOD, DO, nitrate, total chloride, total iron, total cadmium, total lead, total chromium, total manganese, total nickel and total zinc. The geological and soil studies were achieved by investigations, where five different soil profiles were collected and analyzed chemical, physical and mineralogically. Furthermore, the main human activities developed were identified in the sub-basin. Several changes were observed in the water quality of the sub-basin, especially in the parameters: color, BOD, DO and E. coli. Armed with all the data an integrated assessment of water quality was developed, in order to link the nonconformities in the analysis of water with other studies. Thereby, the water resources characteristics can be related to the main factors that influence it and control measures for improving the environmental quality of the sub-basin can be proposed.