福建兴化湾附近海域水动力特征研究

Study on Hydrodynamic Characteristics of Waters near Xinghua Bay in Fujian Province

基于兴化湾海域实测水文资料,采用相关潮汐潮流调和分析方法建立了附近海域二维水动力数学模型,研究了附近海域的潮汐潮流特性。结果表明,兴化湾海域潮汐属于规则半日潮,平均落潮流历时长于涨潮流历时;测区实测涨潮流流速大于落潮流流速,但落潮流历时长于涨潮流历时;工程海域潮流变化主要受协振波所控制,潮流性质属于不规则半日浅海潮流,潮流运动形式是以往复流为主并伴有旋转性质的混合流态;兴化湾湾内和口门附近以往复流为主,湾外呈旋转流特征;兴化湾内是受南日水道和兴化水道两股潮流作用,水流动力变化特征是兴化水道强于南日水道,其中湾内南侧海域主要受南日水道潮流控制,湾内北侧和深槽海域主要受兴化水道潮流作用。

Based on the measured hydrological data in Xinghua Bay,the tidal current harmonic analysis method was used to establish two-dimensional hydrodynamic model and study the tidal current characteristics of the nearby sea area.The results show that the tide of the Xinghua Bay belongs to the regular half-day tide,and the average tide flow duration is longer than that of the rising tide.The measured tidal current flow rate is greater than the tidal current velocity,but the tidal current duration is longer than that of the rising tide.The change of the engineering sea area is mainly controlled by the resonance wave.The tidal current is an irregular half-day shallow tidal current.The tidal current form is a mixed flow with the main flow and the rotation.Xinghua Bay and the vicinity of the mouth is mainly alternating current,and the characteristics of bay outer are rotary current.Xinghua Bay is affected by the two tidal currents of South River and Xinghua waterway.The flow characteristics of Xinghua waterway are stronger than the South waterway.South of Bay mainly controlled by the tidal current of South River.The north and deep trough of sea area is mainly affected by the tidal current of Xinghua waterway.