泉州湾潮流场的数值模拟研究

Numerical study of tidal current field in the Quanzhou Bay

本文建立了水深平均的二维潮流数学模型,并利用该模型对泉州湾潮流运动进行了数值模拟研究,模拟的潮位过程、流速与流向均与实测值吻合良好。模拟结果演示了湾口至湾顶潮差逐渐增大、潮位滞后、涨落潮历时变化的特性以及湾内的流速、流态分布特征,表明了湾内潮流为正规半日潮,主航道内流速大于周边地区,潮流较强区域位于鞋沙南北潮沟,南槽流速大于北槽,口门内潮流具有明显的往复流特性,口门外潮流具有一定的旋转流性质。

A depth-integrated numerical model was built to simulate the tidal current characteristics of the Quanzhou Bay in this paper. The simulated tidal process, velocity and flow direction were validated by the measured data. The computed results demonstrated the variation of tidal range, tidal level, tidal duration along the bay and the velocity distribution characteristics in the bay, and revealed that the tide in the bay was the semidiurnal tide, the velocity in the main channel was greater than that in the surrounding area, strong tidal area was located in the north and south sand shoes tidal creek, the velocity in the south channel was greater than that in the north channel, the tide flow in the mouth had obvious trend of reciprocating flow characteristics, whereas the tide flow outside the mouth had the characteristics of rotating flow.