Avaliação da qualidade hídrica próxima a uma barragem: um estudo na região metropolitana de Curitiba, São José dos Pinhais - PR

Abstract

The watersheds found close to urbanized regions play a crucial role in the management of water resources, especially when used for public supply. This research was conducted within the area which encompasses the construction of the Miringuava Dam (on the Miringuava River) and aims to evaluate the water quality within this river’s basin. The parameters evaluated were: the nitrogen series, orthophosphate, conductivity, turbidity, dissolved oxygen, salinity, hormones (progesterone, estrone, ethynylestradiol, estradiol) and caffeine. The presence of contaminants of emerging (hormones and caffeine) was also detect at some points during monitoring, for example, the maximum caffeine value found at point P9 (Rio Miringuava) was 2198 ng L-1. There was also a change at point P15 with a caffeine value of 2095 ng L-1. A General Human Contamination Index was calculated, quantifies the presence of contaminants that pose risks to human health. The results indicated that, despite the low concentrations found of contaminants, there exists a relevant water quality degradation in the Miringuava River and the pollution source points should be evaluated by the responsible managers and decision takers.