福建三沙湾的潮汐特征

Tidal characteristics in the Sansha Bay of Fujian

根据福建三沙湾内的霞浦东冲站、宁德城澳站及福安白马站2012年5月至2013年4月实测的逐时潮位资料,经对数据分析后,再计算及统计各站潮位特征值,从而统计分析了福建三沙湾的潮汐特征。结果表明:三沙湾潮汐性质属于正规半日潮,三沙湾潮周期为12 h24 min,潮汐具有明显的季节性现象,潮汐日不等现象明显,最大低潮日不等现象比最大高潮日不等更明显,三沙湾属于强潮型海湾,最大潮差、最小潮差及平均潮差从湾口向湾顶沿程逐步递增,三个站年平均潮差均达500 cm以上,月最大潮差均出现在9月份,月最小潮差均出现在3月份。

Based on the hourly tidal observations data at the Xiapu Dongchong station, Ningde Cheng＇ao sta- tion and Fu＇an Baima station from 2012 May to 2013 April, tidal characteristics in the Sansha Bay of Fujian were analyzed by means of statistics of each station. The results showed that the tidal type in the Sansha Bay was regular semidiurnal tide, tidal cycle in the Sansha Bay was 12 h 24 min, and the tide was seasonal obvi- ously. The tidal diurnal inequality was evident, diurnal inequality was more obvious during low tide than that during high tide. The Sansha Bay was a strong tide area, the maximum tidal range, average tidal range and minimum tidal range from the mouth to the top along the bay were gradually enhanced, the average tidal range was more than 500 cm, and the monthly maximum tidal range appeared in September, the smallest range ap- peared in March.