Freeze-thaw cycles have significant influences on slope erosion processes. In this study, simulated rainfall laboratory experiments were implemented to investigate erosion processes and the relationship between the soil loss rate and hydraulics conditions under different thawed depths and rainfall intensities. The results indicated that linear regression could be used to describe the relationship between the soil loss rate and runoff time. Soil loss rate, as measured by the curve slope k (represented the increase rate in the soil loss rate), generally increased with runoff time over different thawed depths across all rainfall intensities. The k values generally increased with rainfall intensity from 0.6 to 1.2 mm/min, with the exception of the 4 cm thawed slope, for which the k values initially increased before decreasing with rainfall intensity from 0.6 to 1.2 mm/min. The mean soil loss rate and range also increased with thawed depth under the same rainfall intensity. Finally, the interaction of rainfall intensity and thawed depth had the greatest effect on soil loss rate, while stream erosion power was the hydraulic parameter that exhibited the best soil loss rate prediction performance. The results presented herein improve the understanding of the response of freeze-thaw/water compound erosion to hydraulic conditions.

中文翻译：

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黄土边坡解冻深度影响冻融/水复合侵蚀及水力条件的试验研究

冻融循环对边坡侵蚀过程有显着影响。本研究通过模拟降雨实验室实验，研究了不同融化深度和降雨强度下的侵蚀过程以及土壤流失率与水力条件之间的关系。结果表明，线性回归可用于描述土壤流失率与径流时间之间的关系。土壤流失率，由曲线斜率 k（代表土壤流失率的增加率）衡量，在所有降雨强度的不同解冻深度上，通常随着径流时间而增加。k 值通常随着降雨强度从 0.6 增加到 1.2 毫米/分钟而增加，除了 4 厘米的融化坡度，其中 k 值最初增加，然后随着降雨强度从 0.6 到 1.2 毫米/分钟而下降。在相同降雨强度下，平均土壤流失率和范围也随着解冻深度的增加而增加。最后，降雨强度和融化深度的相互作用对土壤流失率的影响最大，而河流侵蚀功率是表现出最佳土壤流失率预测性能的水力参数。本文提出的结果提高了对冻融/水复合侵蚀对水力条件的响应的理解。而河流侵蚀功率是表现出最佳土壤流失率预测性能的水力参数。本文提出的结果提高了对冻融/水复合侵蚀对水力条件的响应的理解。而河流侵蚀功率是表现出最佳土壤流失率预测性能的水力参数。本文提出的结果提高了对冻融/水复合侵蚀对水力条件的响应的理解。