北仑河口潮流特征分析  

ANALYSIS OF CURRENT CHARACTERISTICS IN THE BEILUN ESTUARY

作　　者：董德信[1] 陈波[1] 李谊纯[1] 张荣灿 陈宪云 

机构地区：[1]广西科学院广西近海海洋环境科学重点实验室,广西南宁530007 [2]广西北部湾海洋研究中心,广西南宁530007

出　　处：《海洋湖沼通报》2013年第4期1-7,共7页Transactions of Oceanology and Limnology

基　　金：国家自然科学基金(40766001);广西自然科学基金(2011GXNSFE018002;2012GXNSFEA053001);广西科学院基本科研业务费(11YJ24HY01)资助

摘　　要：为分析研究北仑河口的潮流特征,构建一个平面二维潮流数学模型,采用有限体积法数值求解,利用2011年5月的实测水文资料对模型进行验证,模型较好地重现了北仑河口的潮流状况。进一步分析计算河口地区典型断面的潮、余流场以及主要分潮流分布特征,结果表明:北仑河口属不规则全日潮流河口,落潮流速大于涨潮流速,大潮时落潮流历时大于涨潮流历时;河口余流较小,基本在0.1m/s以下,流向大致与落潮流方向一致;主要日分潮流K1、O1振幅大于半日分潮流M2。To study the current characteristics of Beilun estuary, a two-dimensional current mathemati- cal model is set up and solved numerically by the finite volume method, meanwhile the model is validated by the measured hydrologic data in May 2011. The results showed that the model was better to simulate the movement of current. The distribution characteristic of current, residual current and main current constituent in the typical sections of the estuary are also analyzed and calculated, and the results reveal thated the Beilun estuary is a irregular diurnal tidal current estuary, the ebb current velocity is greater than the flood current velocity, and the duration of ebb current is longer than the flood current; the residual current is small which is mostly in 0. 1m/s below, and the direction is general the same as ebb current; the amplitude of K1, O1 current constituent are greater than the M2 constituent.

关 键 词：北仑河口 潮流模型 有限体积法 潮流特征 余流 

分 类 号：P731.21[天文地球—海洋科学]