Determinacąõ da Pressaõ Ambiental que o Uso da Terra Exerce sobre os Recursos Hídricos na Bacia Hidrográfica do Rio Juqueri, no Município de Mairiporã, Estado de Saõ Paulo, Brazil

Abstract

The objective of this study was to determine the relationship between land use and water quality, through canonical correlations between the WQI parameters and the changes in the last 30 years, using LANDSAT 5, 7 and 8 satellite imagery, through supervised classification were determined 6 classes of use. In order to determine the IQA in the basin, were collected 8 samples in the summer period and 8 in the winter in the years 2015 and 2016 in 3 points in the upper, middle and in the mouth. The results showed that the bodies of water suffered a decrease of area that went from 1,1% to 0,68% in total reducing 0,42%. Regarding the IQA in some sample points were observed values below 51 that is classified as regular for human consumption. Correlations were found between the decrease in BOD values by urban areas. In view of the above, there is a need for planning land use and occupation in the basin area.