GEOMORFODINÂMICA DA FLORESTA ESTACIONAL SEMPRE-VERDE NA PAISAGEM DA BACIA DO RIO GRANDE, OESTE DA BAHIA

Abstract

The regional landscape encompassed by Rio Grande basin, on Western Bahia, has on its Chapadas, in the erosive retreat fronts, the Evergreen Valley forest between the mosaics composed of forest and savanna phytophysiognomies. Therefore, this study intends to evaluate the spatial distribution of the Evergreen Valley forest occurrence, what are the conditions that influence the local landscape, and investigate the possible changes in this scenario at a spatial-temporal intermission. The methods was based on the use of products from the mission SRTM to the development of the geomorphological maps of the areas where the Evergreen forest is found on the landscape, around the river basin, towards the use of NDVI, to compare the variations on vegetation cover during 40 years, since 1975. Moreover, a stratigraphic profile of the site was done in order to obtain information about the local geological structure, and a land profile under the values of NDVI to assess the vegetative strength at the Evergreen forest area throughout the length of the stain. The stratigraphic profile indicated the presence of low porosity rocks along the forest occurrence altimetry, indicating a favorable geomorphological condition to its development.