论文部分内容阅读
黄河下游河道泥沙淤积与中游多沙、粗沙区的来沙关系非常密切，其中粒径大于0．05mm的粗泥沙是淤积下游河道的主要成分。通过重点分析不同年代粗沙区来沙量、粗泥沙模数的变化及水利水保措施对减少粗泥沙的作用，说明黄河中游兴建的水利、水土保持工程对控制水土流失、减少入黄泥沙特别是粗颗粒泥沙发挥了很大作用。
Sediment deposition in the lower reaches of the Yellow River has a close relationship with the sediment in the middle and upper reaches of the sediment and the coarse sediments. The coarse sediment whose grain size is larger than 0.05mm is the main component of sediment in the lower reaches of the river. By focusing on the changes of sediment yield and coarse sediment modulus at different ages and the effects of water conservancy and soil conservation measures on the reduction of coarse sediment, it is shown that the water conservancy and soil and water conservation projects built in the middle reaches of the Yellow River will greatly reduce soil erosion and reduce yellowing Sediment, especially coarse-grained sediment played a big role.