Analyzing the effect of sequence rainfalls on soil properties, runoff production and soil loss in soils with different stability at the small plots

Knowledge of the change of soil properties in each event during sequence rainfalls is very important for recognition the critical period of that the soil would be susceptible to erosion processes is vital. This study was conducted to investigate the effect of sequence rainfalls on the changes of soil properties, runoff and soil loss in eighteen different soils with the same aggregate size (from 4 to 6 mm) using the simulated rainfalls. The experiments were performed at small erosion plots with 80 cm long and 60 cm wide under 9% slope steepness during seven sequence rainstorms with 80 mm h-1 in intensity for 30 min and 5-day interval. The results indicated that significant differences were among the soils in bulk density, water retention, runoff and soil loss (p