Analysis of Dynamic Change Characteristics of River Channel in Sanmenxia Sediment-Laden Reservoir Area

The Yellow River is the most typical sediment-laden river in China and even in the world. The Sanmenxia reservoir area is a fragile ecosystem formed under special water and sand conditions. Under the changes of external hydrological conditions, physical and chemical indicators and other indicators, structure and functional changes of the system would likely happen. Based on the remote sensing images of the region in 1980, 1990, 2000 and 2010, this study uses remote sensing interpretation to analyze the dynamic change law of river channel form in the reservoir area, and analyzes four key regions. The study results show that the overall trend of the river channel in Tongsan section of the Yellow River has not basically changed in the past 40 years. However, the river channel has changed significantly in some areas, and the curvature of the river has basically declined. Therefore, it is urgent to study the law and mechanism of river channel morphology changes caused by the dual effects of human and natural factors.