Siltation and Erosion in Zhengzhou Section of the Yellow River Channel and Its Influencing Factors

Taking the multi remote sensing images dated and hydrological data as the main data sources,the changes in siltation and erosion of the Yellow River in Zhengzhou section were studied.The results show that the river shoreline,channel width,meandering position and angle have changed,and inter-annual change is big.With the application of Xiaolangdi Reservoir,the coming water and sediment conditions of the downstream have been controlled.The swing range of the river channel becomes smaller,but the bending length becomes longer.The transverse current and oblique flows are developing.The main factor of channel siltation and erosion is the flow change.