Diferentes formas da cobertura vegetal e a erosão em entressulcos sob chuva simulada

Abstract

Soil erosion is a generalized environmental threat, it is important your knowledge to the maintenance of terrestrial ecosystems. The objective of this study was to evaluate the importance of water erosion in the semiarid environment scenery in hydraulic conditions, soil breakdown of relationships and flow resistance in the presence of caatinga biome and vegetable residues in interrill erosion. The experiment was conducted in semi-arid watershed of Jacu stream, Serra Talhada, Pernambuco, for this experiment were installed 16 experimental plots subjected to simulated rainfall events for a period of 40 min, The used treatments were caatinga semi-shrub; litter; canopy; and uncovered soil. The values obtained with respect ace runoff on the vegetation elements had lower velocities 0.84 mm compared to uncovered soil 0.70 mm, checking also that the litter and the effect of the canopy of the semi-shrub caatinga succeeded in slowing the flow depth 0.015 m s-1, similarly, the flow rate under these conditions was significantly lower 1.27 x 10-5 as well as the soil losses 0.59 t ha-1. This shows how important of vegetation and vegetation cover on soil protection in the semiarid.