磨刀门河口滩槽演变数学模型预测

Mathematical Model Prediction for the Shoal-channel Evolution of Modaomen Estuary

建立珠江河口区潮流泥沙数学模型,设计合理的计算水沙系列,对磨刀门河口区未来滩槽演变趋势进行了模拟预测。预测结论表明,磨刀门口门河段未来将呈现滩淤槽冲的演变趋势,河道向窄深方向发展,中心拦门沙将主要向SW、SE向发育,内外坡以冲刷为主,西汊将持续向海延伸,东汊处于冲淤交替状态。

This paper established tide and sediment mathematical model of the Pearl River Estuary, and designed reasonable calculation of flow and sediment series, which would simulate and forecast the shoal-channel evolution of Modaomen estuary. The result indicated that the evolution trend of erosion and deposition would be presented at the entrance of Modaomen reach in the future. Also, the riverway would be narrow and deep and the center bar would mainly develop to southwest and southeast. The internal and external slope was dominated by erosion, the west branch would continue to extend to the sea, and the erosion would alternate with deposition in east branch.