Effects of slope length on detachment and transport processes on a 15° loessial hillslope were quantitatively studied by using simulated rainfall of different intensities.Results showed that runoff discharge increased with an increase in slope gradient.At the 50 and 75 mm/h rainfall intensities,the increment of runoff discharge with an increase in slope length was approximately the same.At the 100 mm/h rainfall intensity,the increment of runoff discharge decreased for the 5 m slope length,but for the 5 m slope length,runoff discharge remarkably increased with an increase in slope length.Sediment yield was fluctuated obviously for the 8 m slope length.Sediment regime was characterized by an alternation of detachment-transport dominated and detachment-deposition dominated.