| 珠江河口夏季缺氧现象的模拟 |
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| 引用本文： | 罗琳,李适宇,王东晓.珠江河口夏季缺氧现象的模拟[J].水科学进展,2008,19(5):729-735. |
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| 作者姓名： | 罗琳 李适宇 王东晓 |
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| 作者单位： | 1.中国科学院南海海洋研究所热带海洋环境动力学重点实验室, 广东广州 510301; |
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| 基金项目： | 中国科学院知识创新工程项目，广东省重大科技专项规划项目 |
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| 摘 要： | 夏季底层水体缺氧现象是珠江河口存在的环境问题之一。使用三维水动力-生态耦合模型来分析珠江口缺氧现象的分布状况和产生原因。模拟结果表明:模型能很好的再现珠江口的缺氧敏感性区域和强度。珠江口存在的底层水体缺氧现象是水体强烈层化和生化耗氧过程共同作用的结果。缺氧现象的发展与减退受潮汐涨落的影响。珠江口盐度-潮汐混合锋面和层化作用控制低氧水团的范围和强度。
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| 关 键 词： | 缺氧 珠江口 层化作用 潮汐混合 |
| 收稿时间： | 2007-07-25 |
Modelling of hypoxia in the Pearl River estuary in summer |
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| LUO Lin,LI Shi-yu,WANG Dong-xiao.Modelling of hypoxia in the Pearl River estuary in summer[J].Advances in Water Science,2008,19(5):729-735. |
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| Authors: | LUO Lin LI Shi-yu WANG Dong-xiao |
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| Institution: | 1.Key Laboratory of Tropical Marine Environmental Dynamics, South China Sea Institute of Oceanology, CAS, Guangzhou 510301, China;2.School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China |
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| Abstract: | Hypoxia is one of the environmental problems existing in the Pearl River estuary (PRE).In this paper a coupled 3-D hydrodynamic-ecological numerical model is used to investigate the distribution and causes of the hypoxia phenomena in the PRE in summer.Hypoxia at the bottom layer of the major regions is well reproduced by this model,and in complete agreement with the observed pattern.The main results of the simulation show that the hypoxia phenomena in the PRE are caused mainly by the coupled dynamics of the water stratification and biochemical processes.The simulated hypoxia phenomena develop during the neap tide and disappear during the spring tide.The front and salinity stratification impact greatly on the range and intensity of the low oxygen water in the PRE. |
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