基于FVCOM的黄渤海潮波运动的数值模拟

为进一步加强黄渤海潮波数值研究,采用FVCOM海洋数值模式进行试验并对其底摩擦项进行了改进,对黄渤海的潮波运动进行了数值模拟;根据37个潮位站和3个海域海流的实测资料,对比了调和常数、潮位和潮流数据,计算结果均与实测结果吻合良好;通过对计算结果进行准调和分析,绘制了黄渤海的潮汐潮流同潮图、潮汐潮流性质分布图、潮流椭圆图和潮致余流图。结果表明:模拟区域存在4个无潮点和8个圆流点;潮汐主要以半日潮汐为主,全日潮汐分布在秦皇岛外海、海州湾外海和老黄河口近海;潮流主要以半日潮流为主,全日潮流分布在渤海海峡东南部,近岸表现为往复流,外海表现为旋转流。

Numerical simulation of tidal waves in Bohai Sea and Yellow Sea based on FVCOM

To enhance the numericl research of tidal current in the East China Sea, the bottom friction in Finite-Volume Coastal Ocean Model ( FVCOM) is improved and the tidal wave system of Yellow Sea and Bohai Sea is sim-ulated. The harmonic constants, tidal elevation and tidal current are validated by observation of 37 gauge stations and 3 current stations, showing a good agreement with the observations. The co-tidal chart, current ellipse, Euler residual chart and distribution chart of tidal current property are drawn by quasi harmonic analysis. There are four amphidromic points and eight current- amphidromic points in the simulation area. The tide in model domain is mainly found to be semidiurnal tide, while the diurnal tide is observed at Qinhuangdao offshore, Haizhou Bay off-shore, and coastal old Yellow River delta. The current is primarily semidiurnal current, and the diurnal current is located at southeastern Bohai strait.