土壤剥蚀是指由侵蚀动力引起的土壤颗粒从土壤母质移动的过程。细沟剥蚀土粒随着细沟股流中含沙量的增加而减少 ,已有的一些侵蚀模型 (如 WEPP)均提到了这一点。用黄土高原一种典型的粉壤土 ,在 5种坡度、3种流量下进行了细沟侵蚀模拟试验。对试验结果进行了回归 ,分析了黄土高原斜坡及陡坡地、细沟股流剥蚀率随含沙量以及沟长变化的函数关系。这对细沟侵蚀动力过程的研究深入 ,以及对侵蚀过程的预测预报提供了有力的参考依据 Soil erosion refers to the process by which soil particles move from soil parent material caused by erosion dynamics. Rill erosion of soil particles with the increase of sediment concentration in the gutter decreases, some of the erosion models (such as WEPP) have mentioned this point. A typical loamy loess plateau was used to simulate rill erosion at 5 slop and 3 fluxes. The test results were regressed, and the relationship between erosion rate and sediment concentration as well as groove length variation was analyzed on the slopes and steep slopes of the Loess Plateau. This study of the dynamic process of rill erosion in depth, as well as the prediction of the erosion process provides a powerful reference