Identificação e caracterização dos depósitos de várzea no trecho fluvial da Volta Grande, Rio Uruguai - SC/RS

Abstract

The study of the sedimentary records of surface coverings has great importance for understanding the past and present processes that shaped the landscape, since it is a valuable instrument for interpreting and understanding the processes and changes that a particular landscape has undergone during the last few thousand years. From the point of view of the fluvial environment, the recognition of the width and morphology of the alluvial plain of a river brings important contributions to understand these changes and the sedimentary record that configures the different superficial coverings within the fluvial valley. Therefore, this work aims to analyze the morphology and sediments along the banks of the stretch of the Uruguay River known as Volta Grande on the border between Santa Catarina and Rio Grande do Sul. This perspective is tied to the approach of the interrelations between the River and river environments as a basis for the integrated understanding of the evolution of the landscape in this stretch of the Uruguay River valley in western Santa Catarina. The preliminary delimitation of the floodplain of the Uruguay River was made and contrasted these limits with the results of the field observations and the particle size analysis of samples collected along the Uruguay River as a means of verifying the fluvial participation in the configuration of these sedimentary deposits Of low slope. Thus verifying that prevailing materials predominantly of textural class, argilo siltosa and clayey / very clayey, in a great process of weathering.