大丰港海域挟沙力关系式分析及应用

摘要

基于大丰港附近海域实测水文泥沙资料,对目前国内应用较为广泛的5种挟沙力关系式在大丰港附近海域进行应用计算,在此基础上,采用集中系数法和偏离系数法对计算结果进行对比分析.结果表明:河口水流挟沙力公式能较好地反映大丰港海域的水流挟沙情况,并拟合得到适用于大丰港海域的挟沙力关系式,将该公式应用于大丰港实际围垦工程中,通过建立二维水动力泥沙数学模型,计算得到的围垦后垦区海域年冲淤变化趋势,与数值模拟结果基本相同,表明该公式在大丰港海域具有良好的适用性.%Based on the measured hydrologic and sediment data in Dafeng Port area,we take five widely used sediment carrying capacity formulas to caculate in this area.On this basis,we choose the concentration coefficient and deviation coefficient method to make the comparative analysis of calculation results.The results show that the estuarine sediment carrying capacity formula in Dafeng Port area can reflect the sediment transport, and fit for Dafeng Port area sediment carrying capacity formula.These formulas are applied to calculate the sediment change trend after reclamation in the Dafeng Port reclamation project.The numerical simulation results are basically the same with the calculated ones.The empirical relation in Dafeng Port area has good applicability.