Rainfall was simulated simultaneously using two simulators with
the same design as Meyer (1958). Each simulator was approximately
5.4 m long. Four nozzles (Spraying System Veejet 80100) were
installed in each simulator at a distance of 1.1 m apart. The simulation
system oscillated across the soil pan to generate the target rainfall
intensity. Raindrop fall height was 2.3 m. In this case, the mean
diameter of raindrop was 2.1 mm and the kinetic energy was
0.21 MJ ha−1mm−1 when the pressure of 41.4 kPa was used. One
hour events with an average rainfall intensity of 67±5.1 mm h−1
were simulated in this study.