黄河的泥沙主要来自黄土高原的水土流失。黄土高原是在下伏古地貌上堆积厚层黄土而形成的。在人类社会出现以前 ,由于植被的保护作用 ,水土流失轻微 ,在漫长的堆积过程中 ,虽然有侵蚀与堆积的多次轮回 ,水土流失也有多次强弱交替 ,但总的说来是水土流失强度小于黄土的堆积强度 The Yellow River sediment is mainly from the soil erosion in the Loess Plateau. The Loess Plateau is formed by the accumulation of thick loess on the underlying paleogeomorphology. Before the advent of human society, due to the protective effect of vegetation, the soil and water loss was slight. During the long process of accumulation, though there were many cycles of erosion and accumulation, soil erosion also alternated many times in intensity, but in general it was soil and water loss Strength is less than the loess accumulation strength