黄河是一条多泥沙河流,含沙量和年输沙量均居世界大河之首。由于泥沙淤积,下游河道逐年抬高,现已成为地上悬河。随着河道的淤积抬高,防洪水位不断上升,洪水威胁和防洪负担日益加重。针对河槽宽浅,水流挟沙能力 The Yellow River is a multi-sediment river, sediment concentration and annual sediment discharge rank first in the world’s rivers. Due to siltation, the lower reaches of the river have been raised year by year and have now become hanging over the river. With the siltation of the riverway rising and the flood control water level rising, the flood threat and flood control burden have been aggravated. For river flume, sediment carrying capacity