The response time of saltwater intrusion in the Changjiang River Estuary to the change of river discharge in dry season
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摘要: 应用河口海岸三维数值模式, 计算区域包括大通至长江河口及其邻近海域, 设计高分辨率网格, 数值模拟和分析不同潮型下长江河口盐水入侵对大通径流量变化的响应时间。计算结果表明, 不同潮型期间大通径流量的增加, 河口盐度响应的时间在4.0～6.2 d之间, 但小潮期的响应时间明显长于其他潮型期的响应时间。本文给出了长江河口盐水入侵对大通枯季径流量变化的响应时间, 可为河口水文、泥沙和环境等研究中取何时径流量提供了依据。Abstract: Based on the 3D numerical model with high resolution grid, the response time of saltwater intrusion in the Changjiang Estuary to the change of river discharge at Datong in different tidal pattern is studied. The calculated domain of the model includes the lower reaches of the Changjiang River from Datong to the Changjiang Estuary and its adjacent sea. The results show that the time response of saltwater intrusion to the increasing river discharge at Datong in different tidal pattern is 4.0 to 6.2 days, and is obvious longer in neap tide than the one in other tidal pattern. The response time of saltwater intrusion to the river discharge change in dry season was solved in this paper, which can be as a scientific reference when the river discharge should be used in the studies of hydrology, sediment and environment in the Changjiang Estuary.
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Key words:
- the Changjiang Estuary /
- saltwater intrusion /
- change of river discharge /
- response time
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肖成猷, 朱建荣, 沈焕庭.长江口北支盐水倒灌的数值模型研究[J].海洋学报, 2000, 22(5):124-132. 茅志昌, 沈焕庭, 徐彭令.长江河口咸潮入侵规律及淡水资源利用[J].地理学报, 2000, 55 (2):243-250. 罗小峰, 陈志昌.径流和潮汐对长江口盐水入侵影响数值模拟研究[J].海岸工程, 2005, 24(3):1-6. 吴辉, 朱建荣.长江河口北支倒灌盐水输送机制分析[J].海洋学报, 2007, 29(1): 17-25. 曹勇, 陈吉余, 张二凤, 等.三峡水库初期蓄水对长江口淡水资源的影响[J].水科学进展, 2006, 17(4):554-558. 唐建华, 刘玮祎, 赵升伟.长江口徐六泾流量与大通流量间关系的探讨[J].水电能源科学, 2011, 29(7):4-7. 朱建荣, 杨陇慧, 朱首贤.预估修正法对河口海岸海洋模式稳定性的提高[J].海洋与湖沼, 2002, 33(1):15-22． 朱建荣, 朱首贤.ECOM模式的改进及在长江河口、杭州湾及邻近海区的应用[J].海洋与湖沼, 2003, 34(4):364-374． Chen B R, Zhu J R, Fu L H. Formation mechanism of the freshwater zone around the Meimao Sandbank in the Changjiang Estuary[J]. Chinese Journal of Oceanology and Limnology, 2010, 28(16):1329-1339． Wu H, ZhuJ R, Choi B H. Links between saltwater intrusion and subtidal circulation in the Changjiang Estuary: A model-guided study[J]. Continental Shelf Research, 2010, 30:1891-1905． 朱建荣, 傅利辉, 吴辉. 风应力和科氏力对长江河口没冒沙淡水带的影响[J]. 华东师范大学学报(自然科学版), 2008(6):1-8． Li L, Zhu J R, Wu H, Wang B. A numerical study on the water diversion ratio of the Changjiang Estuary during the dry season [J]. Chinese Journal of Oceanology and Limnology, 2010, 28 (3):700-712． 刘高峰.长江口水沙运动及三维泥沙模型研究[D].上海:华东师范大学, 2011． 海洋图集编委会.渤海黄海东海海洋图集(水文)[Z].北京:海洋出版社, 1992:13-168． -
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