Rainfall intensity linked to soil erosion, impacting sediment concentration and runoff.
Soil erosion on sloped lands in the Three Gorges Reservoir Area was studied using simulated rainfall. The sediment concentration in runoff increased with rainfall intensity, peaking and then stabilizing. Fine soil particles were lost through runoff, enriching the sediments. Erosion rates rose with slope gradient, especially above 10°. The slope factor of yellow soil matched the Universal Soil Loss Equation, while purple soil showed a similar trend. Further research is needed to predict erosion in purple soil areas accurately.