During a long rainfall period, infiltrated water can accumulate on top of the slow-infiltration soil layer in A–C structured soils with a lower water permeability in the C layer, which will cause the cultivated A layer to become saturated. Serious erosion could be expected due to the soil saturation, and a specific methodology and testing system were used in this study to transport water flow from the bottom of the cultivated soil layer to keep the test soil saturated. A series of experiments were performed to quantify the rill-detachment process of saturated soil slopes at different flow discharges (2, 4, and 8 L min⁻¹) and slope gradients (5, 10, 15, and 20°). The results showed that the rill-detachment rate of the saturated soil slope could be well matched by an exponential function of the rill length and by a linear equation of the sediment concentration. Changes in erosion resistance lead to the intensification of detachment in saturated soil slopes. The potential rill-detachment rates of the saturated soil slope were 1.8–2.4 times larger than those of the non-saturated soil slope. The results of this research can help to explain the rill-detachment behavior of saturated soil slopes.

在长时间的降雨过程中，渗入的水会积聚在A–C结构性土壤的慢渗土壤层的顶部，而C层的渗透性较低，这将导致耕作的A层变得饱和。由于土壤饱和，可能会导致严重的侵蚀，并且在这项研究中使用了一种特定的方法和测试系统来从耕作土壤层的底部输送水流，以保持测试土壤的饱和。进行了一系列实验，以量化不同流量下（2、4和8 L min ^-1的饱和土质边坡的钻孔分离过程）。）和坡度梯度（5、10、15和20°）。结果表明，利用钻length长度的指数函数和泥沙浓度的线性方程，可以很好地拟合饱和土坡的钻rill分离速率。抗侵蚀性的变化导致饱和土质边坡的分离加剧。饱和土质边坡的潜在钻洞分离速率是非饱和土质边坡的1.8-2.4倍。这项研究的结果可以帮助解释饱和土质边坡的钻探分离行为。