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为分析研究北仑河口的潮流特征,构建一个平面二维潮流数学模型,采用有限体积法数值求解,利用2011年5月的实测水文资料对模型进行验证,模型较好地重现了北仑河口的潮流状况。进一步分析计算河口地区典型断面的潮、余流场以及主要分潮流分布特征,结果表明:北仑河口属不规则全日潮流河口,落潮流速大于涨潮流速,大潮时落潮流历时大于涨潮流历时;河口余流较小,基本在0.1m/s以下,流向大致与落潮流方向一致;主要日分潮流K1、O1振幅大于半日分潮流M2。
In order to analyze the trend characteristics of the Beilun estuary, a planar two-dimensional tidal current mathematical model is constructed, and the finite volume method is used to solve the model. The model is verified by the measured hydrological data in May 2011, and the model well reproduces the trend of the Beilun estuary situation. The results show that the Beilun estuary belongs to the irregular full-day tidal estuary, the falling tide velocity is larger than the tidal current velocity, and the tidal current tide lags longer than the tidal current tide when the tide is high. The estuary The flow rate is basically the same as that of the falling tide flow. The amplitudes of the main daytime tidal currents K1 and O1 are larger than the half day tidal current M2.