海阳核电区域潮流特征分析

Quasi-harmonic Analysis of Tidal Current Data Collected from Six Anchored Stations in Haiyang Sea Area

采用短期资料的潮流准调和分析方法,对水深为4.5~22.5m的海阳核电站6个测站3个周日潮流观测获得的表、中、底层的潮流资料进行了分析。分析结果表明:该区域基本以半日潮为主,且半日分潮中M2振幅大于S2,全日潮仅存在个别站位的个别水层中;测区的潮流属于正规半日潮,但其分潮比WM_4/WM_2大于0.04,表明测区中浅海分潮流具有较大的比重,故测区的潮流性质应为不正规半日浅海潮流的类型;各站位各层表现出不同的潮流运动形式,往复流和旋转流同时存在,不同站位、层次之间的明显差异还需要结合详细的地形调查展开研究;大部分站位的余流流速呈现表层>中层>底层,大致呈现自东北向西南流。

Using the quasi-tidal current method and short-term data,the surface,middle and bottom tidal current data obtained from 6 tidal current observation stations near Haiyang Nuclear Power Station at a depth of 4.522.5 m were analyzed.The results show that the area is dominated by semi-diurnal tide,and the M2 amplitude is larger than S2 in semi-diurnal tide.The diurnal tide is only found in individual aquifers of individual stations.The tidal current in the survey area belongs to the normal semi-diurnal tide.However,the ratio of WM4/WM2 is greater than 0.04,indicating that the shallow sub-tidal current has a large proportion.Therefore,the tidal current property should be of the features of irregular half-day shallow tidal current type.Each station shows different tidal flow patterns,and the swirling flow exists at the same time.The obvious differences between stations and levels need to be studied in combination with the detailed topographic survey.The residual flow velocity of most stations shows surface> middle> bottom and presents from northeast to southwest generally.