摘要
根据1959－1988年部分年份长江口南港-南槽、南港-北槽、北港和北文共22个纵向测次资料，计算分析各人海通道内盐水入侵锋的伸退区域及其特征。利用密度佛氏数F的计算结果，提出确定盐度锋迁移范围和滞流点的判据．研究结果表明，盐度锋对河口最大浑浊带主委有两大贡献：锋区含盐度有利于泥沙絮凝；锋面附近形成的重力环流，有利于泥沙富集，形成最大浑浊带。
Based upon the observed data of partial years from 1959 to 1988, using 22times of longitudinal hydrological field data of the South and North Channels, theSouth and North Passages, North Branch in the Changjiang River Estuary, calcula-tions and analyses have given locations and features of the saIt fronts in the 4 wa-terways.Based on calculations of the densimetric Froude number, the zone of up-down-stream for the fronts and location of null point are determined in the channels ofChangjiang River Estuary.It is indicated that the front plays two roles in the process of the turbuditymaximum. Salinity of the front zone is benificial to flocculation. The gravitationalcirculation in the front zone leads to convergence of sediments from up-downstream.
出处
《海洋与湖沼》
CAS
CSCD
北大核心
1995年第6期643-649,共7页
Oceanologia Et Limnologia Sinica
基金
国家自然科学基金!9487005-01
关键词
盐度锋
滞流点
重力环流
盐水入侵
长江河口
Salt fronts
Null point
Mixing of salt-freshwater
Gravitational circulation
Densimetric Froude number
