Analysis of Direction Change Mechanism of the Changjiang River Diluted Water based on FVCOM and Observation
Received date: 2011-07-13
Revised date: 2012-01-05
Online published: 2012-02-10
A numerical model near the Changjiang River estuary was established based on FVCOM. A few numerical experimentations were conducted by different input condition, such as river discharge amount, wind, tide, baroclinic mode and background current. A series of analyses of direction change mechanism of the Changjiang River diluted water were taken by using the model result and observed data. It is shown by contrast different model results that the main external forces to make the diluted water turn to the northeast is the south wind. River discharge amount, tide and background current play quite an inconspicuous role in the direction changing process. River discharge amount and tide can only affect a small area near the estuary. Because of the stability of it, background current is not a main force for direction changing process. Baroclinic mode does not affect the path of diluted water too much.
Key words： FVCOM; Changjiang River diluted water; Wind; Baroclinic; Background current
Wang Jianfeng, Wang Yu , Wang Gang . Analysis of Direction Change Mechanism of the Changjiang River Diluted Water based on FVCOM and Observation[J]. Advances in Earth Science, 2012 , 27(2) : 194 -201 . DOI: 10.11867/j.issn.1001-8166.2012.02.0194
[1]Le Kentang. A preliminary study of the path of the Chang Jiang diluted water Ⅱ.Model[J]. Oceanologia et Limnologia Sinica,1984, 15(2): 157-167.[乐肯堂. 长江冲淡水路径问题的初步研究Ⅰ——模式[J]. 海洋与湖沼, 1984, 15(2): 157-167.]
[2]Pu Yongxiu. A preliminary analysis of spreading mechanism of the Changjiang River diluted water in summer[J]. Journal of Marine Sciences,1983,1(1):43-51.[浦泳修. 夏季长江冲淡水扩展机制的初析[J]. 东海海洋, 1983, 1(1): 43-51.]
[3]Yuan Yaochu, Su Jilan, Zhao Jinsan. A single layer model of the continental shelf circulation in the East China Sea[J]. Acta Oceanologica Sinica,1982, 4(1):1-11.[袁耀初,苏纪兰,赵金三. 东中国海陆架环流的单层模式[J]. 海洋学报, 1982, 4(1):1-11.]
[4]Gu Yuhe. A study on the cause of the path turning of the Changjiang River diluted water[J]. Oceanologia et Limnologia Sinica,1985, 16(5): 354-363.[顾玉荷. 长江冲淡水转向原因的探讨[J]. 海洋与胡沼, 1985, 16(5): 354-363.]
[5]Yu Kejun. Two-dimensional numerical calculation of residual current and salinity at Changjiang River estuary[J]. Oceanologia et Limnologia Sinica,1990, 21(1): 92-96.[于克俊. 长江口余流和盐度的二维数值计算[J]. 海洋与湖沼, 1990, 21(1): 92-96.]
[6]Zhao Baoren. Primary analysis of direction change mechanism of the Changjiang River diluted water in summer[J]. Acta Oceanologica Sinica,1991,13(5): 600-610.[赵保仁. 长江冲淡水的转向机制问题[J]. 海洋学报, 1991, 13(5): 600-610.]
[7]Liao Qiyu, Guo Binghuo, Liu Zanpei. Analysis of direction change mechanism of the Changjiang River diluted water in summer[J].Journal of Oceanography of Huanghai & Bohai Seas, 2001,19(3): 19-25.[廖启煜, 郭炳火, 刘赞沛. 夏季长江冲淡水转向机制分[J]. 黄渤海海洋,2001,19(3): 19-25.]
[8]Le Kentang. A preliminary study of the path of the Chang Jiang diluted water Ⅱ—The effect of local wind on the path[J].Oceanologia et Limnologia Sinica,1989, 20(2)：139-146.[乐肯堂. 长江冲淡水路径问题的初步研究Ⅱ——风场对路径的作用[J]. 海洋与胡沼, 1989, 20(2)：139-146.]
[9]Zhu Jianrong, Xiao Chengyou, Shen Huanting. Numerical simulation of the wind field’s impact on the expansion of the Changjiang River diluted water in summer[J]. Acta Oceanologica Sinica,1998,20(5)：13-21.[朱建荣, 肖成猷, 沈焕庭. 夏季长江冲淡水扩展的数值模拟[J]．海洋学报,1998,20(5)：13-21.]
[10]Chen C, Liu H, Beardsley R C. An unstructured, finite-volume, three-dimensional, primitive equation ocean model: Application to coastal ocean and estuaries[J]. Journal of Atmospheric and Oceanic Technology,2003,20: 159-186.
[11]Chen C, Cowles G, Beardsley R C. An Unstructured Grid, Finite-volume Coastal Ocean Model: FVCOM User Manual[R]. SMAST/UMASSD Technical Report-04-0601,2004:183.
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