A regularização da vazão como indicador de pressão hidrológico e geomorfológico no sistema estuarino do Rio São Francisco

Abstract

The flow regularization has a direct implication in the hydrological and geomorphological system of the Baixo São Francisco (BSF), with erosion and sedimentation processes reflecting new references to the environmental dynamics in the context of the human-nature relationship. The objective of this work was to study the geomorphological (erosion / sedimentation) and hydrological changes caused by the regularization of the Xingó HPP flow and its implications to the socioenvironmental complex of the estuary. It is observed, therefore, that in the systemic approach the perception of the whole and its connections in the scope of complexity are indispensable conditions, that is, as a complex and unstable whole. The integrated analysis of the landscape proposed by the study represents a methodological and theoretical framework determinant for the planning and development of sustainable productive systems (agroecosystems). The systemic approach based on the use of secondary data, direct observation, cartographic analysis and interview script was an important tool for the present study. The erosion and sedimentation processes were altered with the regularization of river channel flows, contributing to the acceleration of the marginal erosion, sedimentation and formation of sandbanks and transformations in the mouth and adjacent coast, with implications in the environmental complex, represented by the base of natural resources and in the diverse activities developed in traditional and modern family agroecosystems