河口物质和水体长期输运分离的理论分析和观测验证 Ⅰ.物质和水体长期输运分离的理论分析

朱首贤; 丁平兴; 沙文钰; 张文静

河口物质和水体长期输运分离的理论分析和观测验证 Ⅰ.物质和水体长期输运分离的理论分析

1.
河海大学, 海洋学院, 江苏, 南京, 210098
2.
华东师范大学, 河口海岸国家重点实验室, 上海, 200062
3.
解放军理工大学, 气象学院, 江苏, 南京, 211101
4.
解放军理工大学, 气象学院, 江苏, 南京, 211101;中国海洋大学, 海洋环境学院, 山东, 青岛, 266003;国家海洋局, 第二海洋研究所, 浙江, 杭州, 310012

基金项目: 国家973计划资助项目(2002CB412403);国家自然科学基金(40306014);海洋公益性项目(200705013)

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出版历程
- 收稿日期: 2008-02-03
- 修回日期: 2008-08-05

The theory analysis and observational validation for the separation of water and substance’s long-term transport Ⅰ.The theory analysis for the separation of water and substance’s long-term transport

1.
College of Ocean Engineering, Hohai University, Nangjing 210098, China
2.
State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 20062, China
3.
Meterology Institute of Pepole's Liberation Army Science and Engineering University, Nanjing 211101, China
4.
Meterology Institute of Pepole's Liberation Army Science and Engineering University, Nanjing 211101, China;College of Physical and Environmental Oceanography, Ocean University of China, Qingdao 266100, China;Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China

摘要

摘要: 基于单宽断面潮周期平均水体和物质对流输运通量,定义了二维水体和物质长期输运速度,它们分别描述单宽断面水体和物质长期输运的方向及快慢。通过二维水体和物质长期输运速度的对比分析,提出了物质和水体长期输运分离概念:受物质浓度影响,在物质和水体瞬时运动速度相同的情况下,物质和水体潮周期平均对流输运的方向和快慢可能存在差异。本文将二维物质长期输运速度分解为二维水体长期输运速度、二维潮泵输运速度和垂向切变输运速度,它们分别描述余流输运、潮泵输运和垂向切变输运,后两种输运造成单宽断面物质和水体长期输运分离。本文的分析表明,河口受地形、径流、潮流、密度梯度影响,存在有利于物质和水体长期输运分离的自然条件。
- 河口 /
- 物质长期输运 /
- 水体长期输运 /
- 分离研究
Abstract: Based on the tide-averaged convection flux of water and substance at unit length vertical section, 2-D water and substances long-term transport velocity is defined, which describe the water and substances long-term transport direction and speed at unit length vertical section.2-D water and substances long-term transport velocity can also introduce the separation of water and substances long-term transport, namely in the case that substances convection velocity is as same as waters at every tide phase, their tide-averaged convection velocity may be different in direction and speed because of substance concentrations impact.2-D substances long-term transport velocity is decomposed as 2-D waters long-term transport velocity, 2-D tide pumping transport velocity and vertical shear transport velocity, which describe the substances long-term transport from residual current transport, tide pumping transport and vertical shear transpor trespectively.Tide pumping transport and vertical shear transport result in the difference of water and substances long-term transport at unit length vertical section.In estuary, the topographty, river flux, tidal current and density grads make favorable entironment for the separation of water and substances long-term transport.
- estuary /
- the substances long-term transport /
- the waters long-term transport /
- separation study

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