| 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 |
| |
| 引用本文： | 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[J].海洋学报,2008,30(6):24-29. |
| |
| 作者姓名： | 朱首贤 丁平兴 沙文钰 张文静 |
| |
| 作者单位： | 1.河海大学, 海洋学院, 江苏, 南京, 210098 |
| |
| 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) |
| |
| 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。
|
| 关 键 词： | 河口 物质长期输运 水体长期输运 分离研究 |
| 收稿时间： | 2/3/2008 12:00:00 AM |
| 修稿时间： | 8/5/2008 12:00:00 AM |
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 |
| |
| ZHU Shou-xian,DING Ping-xing,SHA Wen-yu and ZHANG Wen-jing.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[J].Acta Oceanologica Sinica (in Chinese),2008,30(6):24-29. |
| |
| Authors: | ZHU Shou-xian DING Ping-xing SHA Wen-yu and ZHANG Wen-jing |
| |
| Affiliation: | College of Ocean Engineering, Hohai University, Nangjing 210098, China;State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 20062, China;Meterology Institute of Pepole's Liberation Army Science and Engineering University, Nanjing 211101, China;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 |
| |
| 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. |
| |
| Keywords: | estuary the substances long-term transport the waters long-term transport separation study |
|
| 点击此处可从《海洋学报》浏览原始摘要信息 |
|
点击此处可从《海洋学报》下载全文 |
|
