| 乐清湾水交换特征研究 |
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| 引用本文： | 罗锋,廖光洪,杨成浩,徐晓华.乐清湾水交换特征研究[J].海洋学研究,2011,29(2):79-88. |
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| 作者姓名： | 罗锋 廖光洪 杨成浩 徐晓华 |
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| 作者单位： | 解放军理工大学气象学院;江苏省海涂研究中心;国家海洋局第二海洋研究所卫星海洋环境动力学国家重点实验室; |
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| 基金项目： | 国家海洋公益性行业科研专项经费资助项目(200705024、201005006); 中国博士后科学基金(20100481459) |
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| 摘 要： | 采用EFDC模式模拟研究了乐清湾水交换的三维过程和时空变化特征,并通过计算水示踪剂质量浓度分析水体置换过程。结果表明,乐清湾水交换主要是由鹿西岛两侧流入的外海水体与湾内水体的交换,以及乐清湾口门西侧附近的湾内水体与瓯江北口径流冲淡水之间的交换。从口门到湾顶,水交换能力差别较大。以最窄的连屿至打水山断面为界,以南水体1个月基本可以完全交换,而以北水体2个月后仍然无法交换至湾口水平。连屿至打水山断面以北地形复杂,岛屿较多,污染物主要通过岛屿间的潮汐汊道输运,断面的瓶颈效应也使得断面以北的水体交换能力稍弱。在口门附近90%以上的水体被外海置换所需时间不到5 d,而此时湾顶水质未有太大改变;15 d左右,80%湾内水体被外海水置换;90%湾内水体被置换仅需40 d;70 d时的水体置换率达97%。
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| 关 键 词： | 水环境 水交换 乐清湾 EFDC |
Study on the features of water exchange in Yueqingwan Bay |
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| LUO Feng,LIAO Guang-hong,YANG Cheng-hao,XU Xiao-hua.Study on the features of water exchange in Yueqingwan Bay[J].Journal of Marine Sciences,2011,29(2):79-88. |
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| Authors: | LUO Feng LIAO Guang-hong YANG Cheng-hao XU Xiao-hua |
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| Institution: | LUO Feng1,2,LIAO Guang-hong3,YANG Cheng-hao 3,XU Xiao-hua3(1.Institute of Meteorology,PLA University of Science and Technology,Nanjing 211101,China,2.Tidal Flat Research Center of Jiangsu Province,Nanjing 210036,3.State Key Laboratory of Satellite Ocean Environment Dynamics,Second Institute of Oceanography,SOA,Hangzhou 310012,China) |
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| Abstract: | Three dimensional processes and temporal and spatial variations of the water exchange in Yueqingwan Bay are studied by statistical analysis of observed data,and also by EFDC model.A convection-diffusion model of dissolved conservative tracer was run after the hydrodynamic simulation became stable.And the water replacement was calculated with the tracer mass concentration in the Bay.The calculated results show that the rising tide flows north-westwards,presenting a floodplain form with low flow velocity,and ... |
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| Keywords: | water environment water exchange Yueqingwan Bay EFDC |
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