This paper investigates the erosion characteristics of soils using the pinhole test. The tests were conducted with two undisturbed clay samples and five disturbed sandy soil samples. Based on the pinhole test results, a process to analyze the critical shear stress and erosion rate was proposed. The result indicates that the particle size distribution and coefficient of uniformity of soils are significant factors that affect the erosion characteristics of the soil. Samples with a grain size ranging from 0.2 to 0.6 mm is most susceptible to soil erosion. The erosion coefficients can be used to distinguish between the low erodible soils (ND3 and ND4) and high erodible ones (D1 and D2). Furthermore, it is interesting to note that the critical shear stress might be used as an identification parameter for erosion characteristics of the soil: τ_c > 3.5 Pa (ND3), 3.0 Pa < τ_c < 3.5 Pa (D2), and τ_c < 3.0 Pa (D1).

本文利用针孔试验研究了土壤的侵蚀特性。测试是用两个未扰动的粘土样品和五个扰动的沙质土壤样品进行的。基于针孔试验结果，提出了一种分析临界剪应力和侵蚀速率的方法。结果表明，土壤粒度分布和均匀系数是影响土壤侵蚀特性的重要因素。粒度范围为 0.2 至 0.6 毫米的样品最容易受到土壤侵蚀。侵蚀系数可用于区分低可蚀性土壤（ND3 和 ND4）和高可蚀性土壤（D1 和 D2）。此外，有趣的是，临界剪应力可用作土壤侵蚀特征的识别参数：τ _c  > 3.5 Pa (ND3)、3.0 Pa <  τ _c  < 3.5 Pa (D2) 和τ _c  < 3.0 Pa (D1)。