摘要
潮流对海域的生产活动、生态保护等具有重要影响,掌握潮流特征具有重要意义。本文基于南田岛周边海域夏季大潮实测资料,开展该海域潮流特征分析,分析发现,研究海域垂向最大平均流速自东向西逐渐增强,造成这种现象的原因主要为水深地形因素的影响;总体上涨潮流历时长于落潮流历时;南田岛海域为正规半日潮海域,东侧测点具有旋转流特征,而南侧和西侧测点为往复流特征;测区垂线平均余流不大,多在0.10 m/s以内,整体上看,夏季余流方向多为偏涨潮流方向。
Tidal current plays an important role in marine production activities and ecological protection.It is of a great significance to characterize tidal current.Based on the data of a large tide in summer around Nantian Island,we determined the tidal current characteristics of the sea area.The analysis showed that the vertical maximum average velocity of the studied area gradually increases from east to west,and the main reason for this phenomenon is the influence of water depth and topography.The duration of rising tide is longer than that of falling tide.Nantian Island is a normal semi-diurnal tide area,and the measuring points on the east have the characteristics of rotating current while the measuring points on the south and west have the characteristics of reciprocating current.The average vertical residual current in the survey area is not large,mostly within 0.10 m/s.On the whole,the direction of residual current in winter and summer is mostly in the direction of partial tidal current.
作者
贝京阳
陈杲
俞晓天
BEI Jingyang;CHEN Gao;YU Xiaotian(Ningbo Marine Environment Monitoring Center Station,Ningbo 310023,China)
出处
《海洋湖沼通报》
CSCD
北大核心
2022年第5期60-66,共7页
Transactions of Oceanology and Limnology
基金
自然资源部东海局青年基金(DH202011)
关键词
潮流
调和分析
南田岛
潮流椭圆
tide
harmonic analysis
Nantian island
tidal current ellipse
