Vital, Saulo Roberto de OliveiraMedeiros, Thiago Douglas Silva de2021-06-172021-06-172021-03-01MEDEIROS, Thiago Douglas Silva de. Dinâmica geomorfológica e suscetibilidade erosiva na bacia hidrográfica do Rio Barra Nova, região do Seridó, Nordeste do Brasil. 2021. 97f. Dissertação (Mestrado em Geografia - Ceres) - Centro de Ensino Superior do Seridó, Universidade Federal do Rio Grande do Norte, Natal, 2021.https://repositorio.ufrn.br/handle/123456789/32735Soil erosion by water action is today an environmental problem that affects different regions across the globe. The disordered use of land in hydrographic basins can enhance it, triggering several problems; for example: landslides, landslides, silting of reservoirs, among others. Thus, it is important to carry out analysis of implications for changes in land use that may generate sediment and soil losses. This research aims to analyze the relationship between land use and geomorphological dynamics in the Barra Nova River Basin through three mechanisms: mapping land use in the Barra Nova River Basin; to analyze the geomorphological dynamics of the region from the identification of the different compartments of the relief; and infer the current stage of soil losses in the Barra Nova River Basin, in order to elucidate the level of susceptibility to erosion in the entire basin. For this purpose, images from orbital sensors were used to map land use and identify geomorphological aspects of the basin, in addition to rainfall and soil data. For the estimation of soil loss, the Universal Soil Loss Equation (USLE) was used. The mapping of land use identified 11 classes of use that were verified in the field, the Pasture for Animals class standing out for its greater predominance representing 53.15% of area, followed by the classes Degraded Caatinga, Diversified Temporary Cultivation, Caatinga Shrub, Artificial Reservoirs, Cities, Unidentified Use, Arboreal Caatinga, Villages, Extraction of NonMetallic Minerals and Other Urbanized Areas. Geomorphological mapping was also performed up to the 4º taxon of the methodology proposed by Ross (1992), identifying 9 modeled across the hydrographic basin, which has a dissection index ranging from moderate to very strong. As for the USLE, the basin was mostly classified with an estimate of moderate soil loss, but presenting, if measured by land use units, classification from very low to extremely severe and if measured by modeled, classes from severe to very severe. Thus, the Barra Nova River Basin already shows signs of the need for a more careful look at the existing land uses, for a better management of its natural resources and in mitigating the susceptibility to erosion, avoiding impacts derived from the high production of sediments. The research also demonstrates efficiency in the methodology applied both for the cartographic production and for its verification, which allowed to have more clarity of the reality of the studied space.Acesso AbertoErosãoSuscetibilidadeRelevoUso da terraUSLEmasterThesis