Geomorphologic mapping of the Coité creek watershed - Itiúba-BA

Abstract

Watersheds have undergone changes, mainly of anthropic origin, which disrupt the dynamics of their hydrogeomorphological elements. Geomorphological cartography is one way of analyzing natural environments, including watersheds, because it provides possibilities for representing the relief. Thus, this work aims to propose the geomorphological mapping of the Coité creek basin, Itiúba municipality, Bahia State (BA), northeastern Brazil, as a tool to help land use and occupation, based on the methodology proposed by IBGE (2009). The methodology of the work consisted in the acquisition of aerial photographs and digital stereoscopy, georeferencing and vectorization of the relief features, whose data integration was performed in a Geographic Information System (GIS) environment using the QGIS software (version 3.10.14). In terms of the results, the predominance of forms and processes related to the Flattening Modeling, referring to the pediment, was identified. Dissection Modeling, represented by the residual reliefs of the Serra de Itiúba, and Accumulation Modeling, referring to the alluvial plains. This research highlights the importance of territorial planning and conservation of these environments and of new studies that aim to study the northeastern semi-arid region.