摘要：In this research, soil erosion and sediment yield were calculated by runoff shear stress, runoff energyconsumption and runoff power theory. Results indicated that a linear relationship existed between the averagerunoff shear stress and sediment yield. Soil erodibility in the experiment was 178.5g/(Pa·min), and thecritical shear stress value was 0.54 Pa. Results from energy consumption implied that there was also alinear relationship between sediment transportation and energy consumption of runoff unit width: Dr = 14.61(∆E-0.37), which indicated that the soil erodibility was 14.61g/J, with a critical energy consumption of 0.37J/(min·cm). Results from runoff power theory showed that sediment transportation increased with increase inrunoff power, and the simple linear relationship was also regressed: Y = 8942.2x - 68.676. Generally, thesethree theories each showed certain advantages in describing the soil erosion processes on the slope, amongwhich the results from energy consumption theory were simpler, more accurate, and proved more convenientin describing soil erosion on the slope.
