Contribuição para o diagnóstico socioambiental da microrregião de Araguaína-TO

Abstract

The study of landscape, conceived as a natural system is of fundamental importance for the understanding of the phenomena arising from the relationship between social dynamics and dynamics of nature, allowing assess the results of the relation between time/social space and time/natural space. This research has as main objective to serve environmental contribution to diagnosis of the Microregion of Araguaína from the study of the constraints of the physical environment, resulting in the definition of classes of vulnerability/stability, according to the methodology suggested by Crepani et al. In this sense, the present work part of the consideration that the landscape has a dynamic character and that shows interactions between spaces physical, biotic, and anthropic inserted in space and time dimensions. An approach associated with the environmental analysis, taking into account compliance with the various components of the landscape, both in ways resulting from such as also in their processes related generators, mainly, by the occupation over the past few decades, provides highly significant points to seek the understanding of the inextricable link between society and nature. Within the methodological proposal were characterized the elements of landscape inherent in geology, geomorphology, pedology, vegetal cover and climate and subsequently assigned values on the scale of vulnerability. For each of the groups or geological formations present in the area was established a value on the scale of vulnerability to denudation of rocks, taking into account especially the information of lithology, which resulted in the preparation of a representative map of these values. The same procedure was performed for the other themes. The classification of the degree of vulnerability and stability to the area of study was carried out from the folds of the values resulting from the average of the intersection of all the elements that characterise the area in question, taking into account the processes of morphogenesis and pedogenese. With this methodological procedure was possible to specialize the degree of vulnerability and stability of the Microregion of Araguaína, from the basic information of the physical environment and of land use and vegetation cover, obtaining, therefore the classes: Moderately Vulnerable, Moderately Stable/Vulnerable, Moderately Stable and Stable.