TéCNICAS DE GEOPROCESSAMENTO E MORFOMETRIA APLICADOS NA DETEC O DE ATIVIDADES NEOTECT NICAS NO GRUPO BARREIRAS, ESTUDO DA BACIA HIDROGRáFICA DO RIO GURUJI (PB)

The present study also aims to demonstrate evidence of neotectonics in the Guruji river watershed through morphometric analysis and cartographic products. The study area is located on the southern coast of Paraiba state, northeastern Brazil. The methodology used to detect influences neotect nicas consists in the analysis and interpretation of numerical data obtained in the topographic charts and Digital Elevation Model (DEM) and its derivatives (slope chart, hypsometric chart and 3D model). The morphometric calculation applied to neotectonics analysis was Valley Floor / Valley Height Ratio. The results obtained from the analysis of the products showed that in the central portion of the area there is a strong structural control on the right bank tributaries of the Guruji river, where they have a marked altimetric unevenness, high steep slopes, and deep fluvial cuts and they are more numerous and enlarged than the left bank tributaries. At the end of the course of the river Guruji, there is a steep slant of approximately 90o, where its direction changes abruptly from West-East to South-North.