摘要
应用短期资料的潮流准调和分析方法,对深圳湾4测站两周日海流观测获得的表、中、底层海流资料进行分析,计算了4测站O_1、K_1、M_2、S_2、M_4、MS_4 6个主要分潮的潮流调和常数,并给出各测站在各层的潮流椭圆要素。计算结果表明:深圳湾主要为不规则半日潮流海区,浅水分潮流在总海流中的影响较大;站位1、2和4主要分潮流的北分量大于东分量,而站位3主要分潮流的北分量小于东分量。观测期间余流的流向主要呈北和东北向;最小余流速度出现在站位3;余流流速表层最大,中层次之,底层最小。整个海区潮流的可能最大流速表层在76～102cm/s之间;中层在80～106cm/s之间;底层在56～88cm/s之间。整个海区潮流表现出往复流的性质。
Based on the tidal current quasi-harmonic method for short-term data,two-day series tidal current data from the surface,middle and bottom layers at four anchored stations in Shenzhen Bay was analyzed.The harmonic coefficients of O1,K1,M2,S2,M4,and MS4 constituents were calculated,and so did the tidal current elliptic factors of all layers at the four anchored stations.The results showed that the tidal current in Shenzhen Bay was classified as irregular semidiurnal tidal current and the shallow water constituents had a larger share of the whole current.The north component of constituents was stronger than the east one at the anchored stations 1,2 and 4;while was reverse at station 3.The main direction of residual current during the observation time was north and northeast,the minimum velocity of residual current occurred at the station 3,and the velocity of residual current was largest in the surface layer and then middle,bottom layers.The possible largest velocity of tide current in the sea area was between 76 and 102 cm/s at surface layer,80～106 cm/s at middle layer and 56～88 cm/s at bottom layer.The semidiurnal current movement was reciprocating flow.
出处
《广东海洋大学学报》
CAS
2010年第3期77-81,共5页
Journal of Guangdong Ocean University
关键词
潮流
准调和分析
余流
深圳湾
tidal current
quasi-harmonic analysis
residual current
Shenzhen Bay
