Portal de Periódicos da CAPES

Influência dos fatores ambientais e antrópicos nas águas superficiais no rio Matipó, afluente do rio Doce

2017; Volume: 14; Issue: 1 Linguagem: Inglês

10.21168/rega.v14e2

2359-1919

Deyse Almeida dos Reis, Aníbal da Fonseca Santiago, Laura Nascimento, Edilson Oilveira, Lilian Marques, Hubert Mathias Peter Roeser,

Water Quality and Pollution Assessment

This study was carried out at a Matipó river basin, a tributary of the Doce river, in Minas Gerais -Brazil.The aim of this study was to evaluate the influence of anthropogenic activities and the natural characteristics of its surface water quality.Water samples of 25 stations located along the spring course were collected in two stages, one during the rainy season and the other in the dry season.To understand and discuss data, the Principal Component Analysis (PCA) was applied.Fifteen surface water variables reduced by five principal components, which altogether explained 72.15% of the data variance, were measured.By analysing the graphic, five groups, formed by points where the anthropogenic interference was more noticeable, were identified.PCA enabled to assess whether the environmental and anthropogenic factors influence the water quality.The environmental impacts observed in the watershed as deforestation, erosion and sewage release were the main factors which interfered in the quality of the water.