本文根据野外考察,指出陕北沙黄土区的现代土壤侵蚀过程表现为风、水两相营力的共同作用,形成的地表形态具有风成和水成的双重性特征,在区域分布上具有交错性.这是由营力的季节性强弱对比和地表组成物质的区域差异所形成的.区内主要地面物质沙黄土可以分为细沙质沙黄土和粉沙质沙黄土,二者对风力和流水的抗侵蚀性不同. Based on the field investigation, this paper points out that the modern soil erosion process in the loess region of northern Shaanxi shows the co-operation of the wind and water two-phase forces, and the formed surface morphology has the dual characteristics of aeolitism and water formation. This is due to seasonal strength of the camp power contrast and regional differences in the composition of the material formed by the region the main surface sediment sandy loess can be divided into fine sandy loess and sandy loess sandy loam, Different from the erosion resistance of running water.