The work had the objective to determine the environmental fragility of an area in the municipal district of Pinhais, metropolitan area of Curitiba, using the multiple criteria evaluation technique present in the GIS Idrisi 32. After having generated the maps of slope, distance from the rivers, springs and reservoir, soils and current land use, weights of importance were assigned to each one of the factors, and through Weighted Linear Combination images of potential and emerging fragility were generated. The generated maps with values varying between 0 and 255, were classified into five classes each one representing very high, high, medium, low and very low fragility class. The evaluation of the results was made by a crossed tabulation between the fragility maps and each one of the used factors, concluding that the methodology provided good results, because it was observed the occurrence of the soils of larger fragility, the slope with larger degree of influence in the erosive processes and the proximity to the water resources in the higher fragility classes and the soils of smaller fragility, the smaller slope and lesser proximity of the water resources in the lower fragility classes.
geoprocessing; map overlay; vulnerability
