ANÁLISE ESPAÇO-TEMPORAL DA FRAGILIDADE AMBIENTAL EM UMA BACIA HIDROGRÁFICA NO SUDOESTE GOIANO

Abstract

The cerrado is one of the most occupied biomes in the national territory, being recognized as one of the richest savannas in the world. The substitution of the cerrado for agricultural activities in the region of the Verdinho River watershed brought impacts on the environment. The present work aims to carry out an assessment of environmental fragility in the Verdinho River basin using the methodology implemented by Ross (1994) and adapted by some authors, using geoprocessing and geographic information system (GIS) to generate and compare of the maps of environmental fragility in the years 1985 and 2020. Using the classification method to standardize the maps, giving scores from 1 to 5 for each variable. For this analysis, the parameters of slope, climate and land use and cover were used. In 1985 the predominant use was pastures and non-forest formations, in 2020 there was a change and the predominant use is agriculture. The watershed of Verdinho River over the years had its environmental fragility increased in certain areas by up to 66% due to the exploitation of land use, and also in some areas protected by law it had a decrease in the degree of environmental fragility by up to 40 %.