Geomorphological Mapping Applicated to Ribeirão do Brejão Hydrographic Basin, Municipality of Nova Ponte (MG): Indicators of the Evolution of Relief and Contributions to Planning
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Abstract
This paper presents a geomorphological investigation of the characteristics of the Ribeirão do Brejão hydrographic basin, in Nova Ponte (MG), located at the Plateaus and Tablelands of the northeast edge of the Paraná Sedimentary Basin. It is assumed that the application of detailed geomorphological mapping techniques contributes to data for territorial/environmental planning, as well as indicators of the evolution of relief. The geomorphological elements of this basin were mapped using photointerpretation in ArcGIS software and enabled the elaboration of the Geomorphological map at a scale of 1:25,000. Furthermore, in this study, the production of the Relief Energy map was proposed, which permits to identify the susceptible areas to morphodynamic processes. An integrated analysis of these cartographic products allows obtaining a detail characterization of the topographic elements, as well as sorts of slopes and summits, the action of watercourses and anthropic activities, which corroborate with an interpretation of the natural dynamics and the anthropic interferences in this basin. Due to fieldworks, it was observed erosions and impoundments for irrigation, which grant the analysis of an advance of the denudational forms towards the Upper Basin, the sector with less morphogenetic potential, however, which presents intense anthropic interference. Besides, it is possible to recognize on profiles a pavement over the volcanic flows of the Serra Geral, in which the stone lines can suggest a paleoclimatic condition associated with the past slope flattening processes.
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