Real and estimative erosion through Rusle from forest roads in plain to soft undulated relief.

Abstract

This work aimed to identify the real soil losses proceeding from segments of forest roads and your adjacent areas, and to compare with estimative obtained through the Universal Revised Soil Loss Equation (RUSLE). The evaluation of the soil losses had beginning soon after the wood harvesting and prorogate per one year, with weekly soil samples, or in rain cases with high intensity. The relief conditions vary from plain to gentle slope, with edafic characterization of the type: Álic Dark-Red Argissols and Dark-Red Argissols Latossolic. For the adequacy of the RUSLE the following factors had been considered: erosivity of the rain, obtained through pluviograms and crossing with the data of rainfall of the company; erodibility of the ground, calculated in function of the results of soil analyzes proceeding from the areas; the length and slope inclination had been measured in field; and factors C and P, stipulated through literature. The gotten results had evidenced significance statistics and high correlation between the real values, obtained through sediment flume collector and estimated values through the RUSLE. The soil losses proceeding from the segments of forest roads evaluated had corresponded 99% of the observed total soil losses in the experiment.