In this research, soil erosion and sediment yield was calculated by runoff shear stress,
runoff energy consumption and runoff
power theory respectively. Results indicated that linear relationship was existed between average runoff shear stress and sediment yield, soil erodibility in the experiment was 178.5g/(Pa·min), and the critical shear stress value was 0.54 Pa. Results by energy consumption implied that there was also linear relation between sediment transportation and energy consumption of unit runoff width: Dr=14.61(ΔE-0.37), which indicated that soil erodibility was 14.61 g/J, with critical energy consumption of 0.37 J/(min·cm). Results by runoff power theory showed that sediment transportation increased with the increase of runoff power, and simple linear relation was also regressed: Y=8942.2x-68.676. Generally, these three theories showed its advantage in describing soil erosion process on slope, among which results from energy consumption theory was simpler and more accurate, and was more convenient in describing
soil erosion on slope.