Modifications in the relief of the city of Timon, Maranhão: an analysis from the anthropogenic geomorphology

Abstract

The Anthropogenic Geomorphology as an approach of analysis in geomorphological and geographic research is now understood as a category of analysis, about the processes, materials and forms generated by man, in the landscape, especially in the relief. This work aims to understand the modifications in the forms of relief of the city, especially in the sub-basins of the city of Timon, MA, with changes in river channels, landfills and extraction of materials of colluvial origin for use in construction, having great local economic use, being widely employed. The methodology applied in this research occurred from the perspective of anthropogenic geomorphology, associated with retrospective cartography, which seeks the identification of anthropic changes over time and space, with the aid of geoprocessing cartography techniques and remote sensing, for identification of changes in the terrain. The results indicate that the identified relief forms are forms generated by human actions, actions that are derived from the urbanization process, real estate expansion, and the extraction of materials for construction, used in the urban and residential growth of the city. These modifications, in the forms of relief (hills, hills) and in degraded river channels, generate states of disturbance, especially in the relief. Therefore, realizing that man exerts, by various actions, features in the relief to perform economic activities, such as, for example, extraction and mineral exploration, use of materials in housing construction, road infrastructure, transportation and others.