Analysis of erosion model is a critical step in developing an usable and valid erosion prediction tool; it is crucial to evaluate the performance of the models being used to ensure that the model predictions are realistic. The objective of the present work was to evaluate the performance of models in predicting cover-management subfactor (CiII) for interrill erosion. A complete factorial rainfall simulation experiment with five corn stalk residue cover (0; 0.05; 0.15; 0.40 and 0.80 kg m-2), four slopes, and two replicates was conducted under prewetted conditions to mesure sediment delivery (Di) and runoff (R). In this first experiment was evaluated interrill erodibility (Ki) and the soil cover effect (CiII), on experimental plots of 0.5 x 0.75 m on freshly tilled soil. In the second experiment was evaluated Di, R, Ki and CiII, on experimental plots of 0.5 x 0.75 m on freshly tilled soil. The values of Di, R, Ki and CiII were used to evaluate the performance of the models. The models CiII = e-2.50 SC/100 and CiII = e -2.238 SC/100 showed a good performance in predicting the soil cover effect (CiII).
modeling; rainfall simulation; soil cover
