Contributions of Geomorphological Cartography to land use and occupation planning:

applications in the municipality of Pindobaçu, State of Bahia, Brazil

Abstract

Among the various possibilities for evaluating environments, Geomorphological Cartography stands out as a possibility for analyzing relief forms and processes, and Geomorphological science demonstrates its effectiveness in the face of the thriving occupation of natural areas. In this sense, this work aims to propose a geomorphological compartmentalization of the municipality of Pindobaçu, located in the semi-arid region of Bahia, as a subsidy for planning land use and occupation. For that, the operational procedures were divided into four stages: (I) adaptation of different methodological proposals for geomorphological mapping to the study area; (II) application of digital stereoscopy techniques; (III) calculation of the Relief Dissection Index; and; (IV) interpretation and spatialization of geomorphological facts, based on georeferencing and data integration using QGIS software. Among the results, the existence of three types of modeling was evidenced: dissection, flattening and accumulation, with different processes and associated forms. In dealing with issues intrinsic to planning, this work identified areas of erosion risk susceptible to block displacement, as well as areas subject to seasonal flooding. Fragility scenarios are aggravated when considering the use of the underlying lands and the active human interferences.