A rainfall simulator and a soil channel were used to evaluate the effect of the soil slope and kinetic energy of simulated rainfall on the soil loss for interrill areas. The experiment consisted of a factorial arrangement, with five values of kinetic energy (495, 832, 1,151, 1,541 e 1,959 J m-2) corresponding to precipitation intensities of 30, 46, 69, 88 and 107 mm h-1, respectively, and five soil slopes (2, 6, 10, 14 and 18%). In the test, a horizon of a Red Yellow Latosol soil was used. The soil loss was determined by direct method and a regression equation was obtained relating the soil loss with the soil slope and kinetic energy. The results showed that the accumulated soil loss with time presented a tendency towards linearity providing, this way, soil loss rates constant through out the tests; and the total soil loss increased with the increase of the soil slope and of the kinetic energy, but the slope had a less expressive effect on soil loss than the precipitation kinetic energy.
kinetic energy; slope; rain simulation; erosion interrill
