茫茫黄土高原，闻名于世。黄河在这里穿峡走谷，饱含大量泥沙后，进入下游．从而形成了黄河复杂难治的特性。“治水先治源”，治沙是根本。历史上，许多治河人士已经意识到这一根本性问题，曾把目光投向这片大而无际、千沟万壑的土地。然而在漫长的封建统治时期．国力衰微，民? The vast loess plateau, world-famous. The Yellow River here wearing Gorge Valley, full of large amounts of sediment, into the downstream. Thus forming the Yellow River complex refractory features. “Water treatment first to cure”, sand control is fundamental. Historically, many of the river people in Japan have come to realize this fundamental issue and have turned their attention to this vast and endless valley. However, during the long feudal rule. Decline in national strength, people?