GEOMORPHOLOGICAL COMPARTMENTALIZATION OF THE EXOKARST OF NATIVIDADE AND CHAPADA DA NATIVIDADE – TO

Abstract

The southeast of Tocantins is characterized, among other geographic aspects, by the well-developed karst, which motivated the realization of the geomorphological compartmentalization of the karst relief located in Natividade and Chapada da Natividade municipalities. In this sense, this study aimed to consider the influence of endogenous and exogenous factors in the landscape configuration. At the same time, each portion of the relief was defined. For this purpose, with the aid of images from the ALOS/Palsar, Sentinel 2A satellites and the topographic chart (SC.23-Y-C-IV), maps were made of the local drainage network, altimetry, slope, as well as the elaboration of topographic profiles and diagram block, for better detail of the exokarst. The Avenza Maps software and points on Google Earth Pro made navigation on fieldworks faster and objective. Then, the area was divided into three compartments: Compartment of Non-Carbonatic Metassedimentary Plateaus (PMNC), Carbonate Plateaus Compartment (CPC) and Surfaces with Sinkholes Occurrence (SCOD). The work also resulted in the creation of an exploratory map of karst phenomena on a semi-detail scale (1:50,000). Thus, the work can contribute to the development of environmental policies and serve as reference for new research, assisting in producing detailed knowledge of karst in the studied region.