人工半封闭海湾潮动力演变特征的数值研究——以威海金线顶为例

Numerical study on the tidal dynamic evolution in an artificial semi-enclosed bay--take the top of Weihai Jinxianding bay as an example

海湾潮动力数值模拟已随计算机科学的发展而得到近海工程界越来越多的应用。本文以威海金线顶人工海湾为例进行了二维水动力的数值模拟,经与实际测量数据进行对比验证,得出了在观测期间流速和水位的变化趋势;同时分析了金线顶半封闭人工海湾海水交换率以及海水的半交换期。结果表明,在涨潮以及落潮的不同潮汐条件下海湾北侧的水体流动比较活跃,而海湾南侧的水体则流动较慢。鉴于在威海市整体规划中将要在海湾南部修建游艇码头,故需要平稳的海面,但是要着重关注海湾内水体的交换周期,以防止湾内水质恶化对其生态景观造成的不良影响。

With the development of computer science,numerical simulation of tidal dynamics in a bay has been applied more and more in offshore engineering.In this paper,a 2-d hydrodynamic simulation in the artificial bay on the top of the Weihai golden line was carried out.At the same time,the seawater exchange rate and the half-exchange period in the semi-closed artificial bay are analyzed.The results show that under the different tidal conditions of high tide and low tide,the water flow in the north side of the bay is more active,while the water flow in the south side of the bay is slower.In view of the overall planning of the Weihai city,ayacht dock will be built in the south of the bay,so a stable sea surface is needed.However,the exchange cycle of water in the bay should be paid special attention,so as to prevent the adverse impact of water quality deterioration in the bay on its ecological landscape.