袁小婷,程和琴,郑树伟,石盛玉,马玉改.近期长江大通至南京河段潮动力变化趋势与机制[J].海洋通报,2019,(5):553-561
近期长江大通至南京河段潮动力变化趋势与机制
A study on the trend and change mechanism of tidal dynamic at Datong-Nanjing Reach of the Yangtze River in recent years
投稿时间:2018-12-16  修订日期:2019-02-26
DOI:10.11840/j.issn.1001-6392.2019.05.009
中文关键词:  潮差  变化机制  趋势分析  分潮振幅  长江河口
英文关键词:tidal range  change mechanism  trend analysis  constituent amplitude  Yangtze River Estuary
基金项目:国家自然科学基金国际(地区) 合作与交流项目(51761135023)
作者单位E-mail
袁小婷 华东师范大学河口海岸学国家重点实验室上海200062 420195617@qq.com 
程和琴 华东师范大学河口海岸学国家重点实验室上海 200062上海市崇明生态研究院上海 200062 hqch@sklec.ecnu.edu.cn 
郑树伟 华东师范大学河口海岸学国家重点实验室上海 200062山东师范大学地理与环境学院山东 济南 250358  
石盛玉 华东师范大学河口海岸学国家重点实验室上海200062上海市工程建设咨询监理有限公司上海200433  
马玉改 石家庄学院资源与环境科学学院河北 石家庄050035  
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中文摘要:
      近期长江感潮河段径、潮动力已然发生变化,但其变化机制与趋势有待进一步探讨。通过对长江大通至南京河段的野外调查,并分析了近40 年来大通、芜湖和南京站水文资料,探讨了近期该河段的潮动力变化机制与趋势。结果表明:近年来长江大通至南京段潮动力有增强趋势。具体表现为相近径流量条件,潮差平均增大约10 cm,主要分潮振幅增加10 %~30 %,潮汐形态系数有减小趋势。引起上述变化的原因可能有: (1) 近期感潮河段整体冲刷变深导致潮波上溯阻力减小; (2) 口外潮汐动力增强以及海平面上升等使潮汐上溯能力增强。此外,长江流域修建了大量水库群,导致该河段径流量变化由自然因素主导变成自然与人为调控共同作用为主,从而影响了潮动力的相对强弱。
英文摘要:
      The hydrodynamic of runoff and tide in tidal river of the Yangtze River has changed recently. Therefore, it's necessary to further understand the related mechanism and predict it's tendency. The changing mechanism and trend of tidal dynamics in Datong-Nanjing Reach has been analyzed by the hydrological data at Datong, Wuhu and Nanjing Station in recent 40 years and Long-term field investigation. Results show that:the tidal range increased by 10 cm, the amplitude of major tidal component increased 10 %~30 %, and the potential phase decreased under the same flow condition. It is believed that the reasons for the above changes may be as follows;The overall scour and morphology change of tidal reach lead to the decrease of upstream transmission resistance;The tidal upstream transmission capacity increased for the increasing tidal energy off the coast and rising sea level. In addition, a large number of reservoirs have been built in the Yangtze River basin, which leads to the change of runoff in section from natural factors to natural and artificial regulation, thus affecting the relative strength of tidal dynamics. Keywords:tidal range; change
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