Estudo dos estressores e aspectos ambientais no ponto de captação superficial da microbacia do rio Toledo visando a segurança na qualidade da água de abastecimento público

Abstract

Water is indispensable for the survival of any living being, and it fundamentally contributes to society through its use for limitless activities. Over time, the discussion about its availability and quality intensified, in view of the growing population and the generation of contaminants through anthropic actions. The present work used a morphometric analysis to diagnose the sub-basin of the Toledo River, from its source to the surface water collection point of the Sanitation Company of Paraná - SANEPAR, in addition to identifying and analyzing the environmental stressors that reached, in specifically, the surface collection point, responsible for 40% of the total water supply in the municipality. The tolerant study of physical data, which were translated into morphometric parameters regarding the shape, drainage and relief of the basin. The results highlight a basin with a high surface runoff capacity and low propensity for water accumulation in its bed, provided by an elongated shape, in addition to a relief plane. The identified characteristics point to a potential for erosion and the need to maintain the vegetation cover. As for the analysis of environmental stressors, in the semi-quantitative analysis of prioritization of risks, the existence of dangerous events classified as high risk was observed, closely related to the ease of access by third parties to the area under study. Control measures were proposed aiming at risk management in the surface catchment basin based on the proposed guidelines for Water Safety Plans suggested by the World Health Organization aimed at ensuring water quality.