Analysis of tidal current characteristics and seasonal variation inHaitan strait
Based on the monthly tide level data and the hydrological synchronous survey data in spring and neap tides in Haitan strait in spring,summer,autumn and winter,characteristics of the tide and tidal current in sea area near Haitan strait were analyzed,and the influencing factors of residual current variation characteristics in Haitan strait were discussed.The results showed that the tide in the sea area near Haitan strait belonged to the regular semi-diurnal tide,and the ebb tide duration was generally slightly longer than the flood tide duration.The tidal current belonged to the regular semi-diurnal tidal current,the shallow water sub tidal current was relatively significant,and the main direction of the ebb and flow tidal current was obvious,which was a reciprocating current.The tidal waves in Haitan strait were standing waves.The seasonal variation of residual current was significantly affected by the coastal current of Fujian and Zhejiang in the East China Sea and monsoon,the residual current was generally southward in winter and northward in summer.
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万方数据
