连云港近岸海域余流特征及其季节变化

根据连云港近岸海域夏冬季多站同步连续实测潮流资料,分析了不同季节、不同潮周期余流变化特征。结果表明,余流大小由北向南呈逐渐增大趋势,余流方向在海州湾海域主要为西南向,港口南部海域余流的方向受地形和径流影响,规律性较差。余流垂向大小变化表现为4种形式,方向变化表现为2种形式。夏季上层余流大小、方向与近底层存在明显的差别,冬季余流在垂向上分布相对均匀。

Characteristics and seasonal variation of residual current in Lianyungang nearshore area

Based on the observation of the current at several stations conducted synchronically in winter and summer respectively in Lianyungang nearshore area, the variation of residual current is analyzed with different seasons and tidal cycles. Results show that the magnitude of residual current is increasing gradually from north to south. The direction of residual current is mainly toward southward in Haizhou bay, while the regularity of the direction southward the port area is poor owing to the effects of topography and runoff. The magnitude of residual current exhibits four varied types, and the direction of residual current exhibits two varied types. The magnitude and direction of the upper residual current are different from that of the low layers in summer, while the vertical distribution of residual current is relatively uniform in winter.