Environmental fragility as an indicator of the risk of contamination by human action in watersheds used for public supply in western Paraná, Brazil

The application of environmental fragility in studies evaluating watersheds can guide policy decisions on monitoring and land use management, improving water quality for public supply. aim this study is to characterize the supply relate it factors. Physical, chemical, microbiological data associated with were measured nine rivers. Landscape features used calculate fragility, such as slope, soil type, cover assessed help geoprocessing tools, addition Köppen-Geiger-based climate characterization. municipalities largest areas classified high are: Guaraniaçu, Catanduvas Cascavel, requiring greater attention. variation responded mainly values temperature, pH, E. coli COD, which may be strongly difference slope evaluated areas.