Studies on Sedimentary Characteristics and Process of Erosion-Accumulation of Guangli River Mouth Bar

Based on field survey data, the hydrodynamical characteristics, submarine topographic features, sediment types and stratum distribution of the Guangli river mouth are obtained. The sediment source and erosion-accumulation process are discussed through analyzing previous data and current sedimentary characteristics. The results indicate that the sediment of the Guangli river mouth bar came from the upriver Guangli river, the Zhimai River and Yihong River, while the sediment of the Huanghe River produced an important effect on the mouth bar, and the river mouth bar has entered an equilibrium phase. The result shows that the hydrodynamic action on the northern side of the bar is stronger than on the southern side, therefore a channel in the east by south-west by north direction will be advisable.