APLICAÇÃO DA EQUAÇÃO UNIVERSAL DE PERDA DE SOLO (USLE) NA PREDIÇÃO A EROSÃO HÍDRICA NA BACIA HIDROGRÁFICA DO CÓRREGO FRANCISQUINHA – PORTO NACIONAL - TO

Resumen

Used by several researchers to estimate soil loss by laminar erosion, a Universal Soil Loss Equation (USLE) has been shown to be highly efficient without the diagnosis of soil erodibility. The objective of this work is to evaluate the Erosive Natural Potential (PNE) and the soil loss (ton / ha / year) in the hydrographic basin of the Francisquinha stream - Porto Nacional (TO). For an estimate of the erosion process, he made an application of USLE in GIS using free data. It was observed that 70.89% of the surveyed area presents Erosive Natural Potential (PNE), being classified as low to moderate erosive potential. On the other hand, 29.11% presented a strong or very strong risk of natural erosion. Consider an anthropic influence through the use and management of the soil (CP) in the equation, It is noticed that the sites with the highest risk of natural erosion are now in the middle and low course of the stream Francisquinha. In this scenario, only 7.73% of the center-west portion of the study area signs of soil loss between strongly strong.