Study on Evolution and Prediction of the Yellow River Estuary Wetland: Fid-Bau Portal

Study on Evolution and Prediction of the Yellow River Estuary Wetland

Wu, Linjing / Zhou, Zhenmin

Estuary wetland, as an independent “living body”, has the process of geographical evolution, i.e. juvenile stages (juvenile), maturation stage (adult) and aging stage (later). Taking the Yellow River estuary wetland as a case study, this paper calculates the evolution stages of the estuary wetland by using the area-elevation integral curve and fractal theory. The following conclusions are obtained. (1) In the juvenile stage, the basin erosion are strong, estuary wetland develops quickly due to high sediment transport into the estuary area. When the basin geomorphology develops to the adult stage, the river sediment transport is stable, the estuary wetland area continues to expand at a stable speed. In the later stage, erosion from the river basin weakens, the river sediment transport decreases, the sediment transport to the estuary wetland decreases, and the wetland begins to shrink gradually. (2) Human activities directly affect the ecological environment of estuary wetlands and shorten the evolution process of estuary wetlands. (3) According to the temporal and spatial variation trend calculation on Yellow River estuary wetland, the total area of wetland in 2025 will be 2518.4 km², of which natural wetland accounts for 1252.8 km², the area of constructed wetland accounts for 1265.6 km². Natural wetland begins to shrink. Therefore, it is necessary to take measures to protect the natural wetland in the Yellow River Delta, to control the development of constructed wetland reasonably, and to realize the sustainable development of wetland ecological environment in the Yellow River Delta.