A influência das características da chuva e da cobertura vegetal sobre o escoamento e a erosão do solo.

Abstract

Two deterministic models to predict flow and erosion in nine experimental parcels of 100 m, located in Sume Experimental Basin (Brazilian semi-arid region), were used. The models take into account not only its aplicabilily to the region but also its facility to obtain the parameters used by them, because it is one of the main difficuties found by the researchers when they want to apply the several existing models to this region. The first model is the multiple linear regression, is empirical, well known all over the world. The second, is the WESP (Watershed Erosion Simulation Problem) model, is of the fundamental type, it is more complex than the previous and has as frame the infiltration processes, the flow hydraulic and the mecanism process of erosion and deposition. Both models simulate the flow and the erosion per event and the results obtained were considered very good.