摘要
基于三维数值模式ECOM-si,采用通量机制分析的方法,对长江河口北支倒灌盐水的输送机制进行了定量研究.模式计算了南北支分叉口和南支河段的潮平均单宽盐通量、各叉道上10个断面的潮平均盐通量和上述两者的机制分解项.基于计算结果讨论了北支倒灌盐水输送的动力机制,发现Lagrange余流输送和潮泵输送在倒灌盐水的输送中起主导作用.讨论了南支各叉道输送倒灌盐水的数量关系,给出了北支盐水倒灌输送的主要路径.
Based on the 3D numerical model, the transport mechanism of the saltwater spilling over from the North Branch in the Changjiang Estuary is analyzed quantitatively by use of the flux analysis method. The tidal averaged unit salt flux around the bifurcation of the South and North Branches and the transectional salt flux in each waterway together with their analysis constituents are calculated. Based on the model results the transport mechanism of the saltwater transport is discussed, and the Lagrange residual as well as the tidal pump are found as the main dynamic factors. The transectional salt flux in each waterway in the South Branch is compared, and then main transport course of saline water is discussed.
出处
《海洋学报》
CAS
CSCD
北大核心
2007年第1期17-25,共9页
基金
国家自然科学基金(40376027)
国家自然科学基金重点项目(4023101)
长江学者和创新团队发展计划项目(IRT0427)
关键词
盐度输送
通量机制分析
倒灌
数值模拟
长江口
salinity transport
flux mechanism analysis
saltwater spilling over
numerical simulation
Changjiang Estuary
