黄河河口潮流和泥沙淤积过程数值分析研究

Numerical simulation and analysis on tidal current and sediment silting process in Yellow River estuary

用有限元方法对黄河河口海域的潮流海洋动力过程进行了数值模拟和分析;通过对典型时刻河口潮流流速矢量图和流速等值线分布图的分析计算,验证了黄河河口门外以及渤海湾和莱州湾交界点存在的两个高流速场;通过入海泥沙淤积厚度等值线平面分布及其变化过程、淤积厚度沿入海流路纵向的变化过程和海底典型高等线+1m,0m和-1m变化过程对河口海岸冲淤、海底变形过程进行了动态跟踪模拟和分析,所得结果与实测资料和遥感解译图像分析基本一致。

The Finite Element Method(FEM) is applied to numerically simulate the tidal flow in the vicinity of the river mouth of Yellow River.The calculated result shows that the areas with high current velocity exist at the outside of the river mouth and at the junction of Bohai Bay and Laizhou Bay.According to the contour lines of sediment deposition, the variation process of deposition thickness along the flow direction as well as the contour lines of seabed, the deformation process of the seabed is analyzed.The calculated result is in good agreement with the observation data as well as the interpretation graphics of satellite remote-sensing data.