黄河中游大理河地区输沙过程的估算模式

Estimate Model for Sediment Transport Process of Dali River Region on the Middle Reaches of the Huanghe River

ediment transport process by flood in the ten odd small basins of the region of Dali River on the middle reaches of the Huanghe River is analyzed and it is show that there is a special sediment retrogradation rule of flood in this region,i.e. the sediment concentration is high,and the retrogradation process is slow,approaching a straight line in the graph.The process of sediment concentration with the time of flood can be simulated by the generalized method of triangle,The apex of triangle can be determined by the relation between water and sediment,and the whole process of sediment retrogradation can be solved by the linear relation,So the process of sediment concentration can estimated and the transport rate can also be determined.