Caracterização da vulnerabilidade ambiental na microbacia do Córrego Azul, Ivinhema - MS

Abstract

The lack of planning for land use is now largely responsible for environmental hazards in water bodies, the watershed of the Blue Stream has been undergoing a rapid process of transformation of the landscape. In this sense, the present study aimed to characterize the environmental vulnerability in the watershed of the Blue Stream in Ivinhema - MS, as grant of planning and environmental management. To this end, GIS techniques were employed, together with processes of remote sensing and secondary data mappings, to characterize the geo-environmental components of land use, soil, slope and geology, which were used as variables in the assessment of vulnerability in the watershed. The integration of variables was performed with the application of algebra maps by LEGAL programming available in SPRING 5.2.1 application, which allowed to classify and quantify the variation of vulnerability within the watershed. This allowed us to identify the geo-environmental factors that influence the vulnerability of each class. As a result, it was found that the areas of high environmental vulnerability correspond to 12,65% of the watershed area, whereas the environmental average vulnerability occupies an area of 74,33%, while areas of low vulnerability correspond to 13,01%. With this study, we concluded that the urban area, wetlands and permanent preservation areas comprise areas of high environmental vulnerability, with a capacity for change in the stability of the watershed. It is hoped that this study may support the government in developing a policy planning and land use and occupation of land that takes into account the variation of the environmental fragility of the medium.