Análise da fragilidade ambiental como subsidio a expansão urbana do município de Toledo - PR

Abstract

The degradation of natural resources is a constant reality in the cities of Brazil and has been triggering worrying environmental and social problems. The study of environmental fragility, intensified by anthropic actions in urban spaces, needs to be the object of research aimed at urban expansion. Thus, the main objective of this research was to elaborate a diagnosis of the environmental fragility of the city of Toledo, Paraná, to serve as a subsidy for urban­environmental planning. Considering the importance of geotechnical analysis for the implementation of conservation techniques, the Use and Occupation, Slope and Soil maps were prepared. Overlapping these charts, the Environmental Fragility map was generated, showing different degrees of environmental fragility ranging from very low to very high, represented by a numerical scale from 1 to 5, according to their genetic and anthropic characteristics. The use of the fragility map to create a proposal map for urban expansion was of great relevance. The very low and low fragility classes occupied 27.42% of the total area of Toledo, with the highest percentage being the middle class, with 67%, and the upper class with 6.63%. These mappings proved to be of great importance for the proper occupation of the territory, as they include different components of the environment, enabling a better understanding of the limits and potential of the area to be occupied. Therefore, this mapping can support the urban and environmental planning of the city of Toledo.