Controle fluviais e a diversidade de estilos fluviais do médio e baixo curso do Rio Paraíba (PB)

Abstract

River basins are important landscape units, which should be studied at different scales with the intention of understanding the past, present and future of river behavior evolutions, which directly affect soil occupation. In view of this, environmental variables such as rain, geology and altimetric variation and their relationship should become a focus within the boundaries of the basin. And for this one must locate and analyze how each type of geological units reacts in conjunction with the rainfall variation. Within the hydrographic basin of the middle a nd low course of the Paraiba River located in the Northeast of Brazil, sedimentary soils were identified under the influence of rainfall with averages above 1500mm per year, and crystalline soils under average rainfall between 400mm and 700mm. Which give rise to ephemeral, intermittent and perennial rivers, which have therefore generated in the landscape a river diversity that forms geomorphic units in the river channel that can be classified as non-confined, semi-confined and confined.