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Impacts of human interventions on the seasonal and nodal dynamics of the M_(2)and K_(1)tidal constituents in Lingdingyang Bay of the Zhujiang River Delta,China

引用

Acta Oceanologica Sinica 2021年第10期40卷 49-64页

作者： Ping Zhang Qingshu Yang Haidong Pan Heng Wang Meifang Xie Huayang Cai Nanyang Chu Liangwen Jia Institute of Estuarine and Coastal Research School of Marine Engineering and TechnologySun Yat-sen UniversityZhuhai 519082China Guangdong Provincial Engineering Research Center of Coasts Islands and ReefsZhuhai 519082China Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) Zhuhai 519080China Key Laboratory of Physical Oceanography Ministry of EducationQingdao 266100China School of Marine Science Sun Yat-sen UniversityZhuhai 519082China

Natural and human-induced changes may exert considerable impacts on the seasonal and nodal dynamics of M2 and K1 tidal ***,quantifying the influences of these factors on tidal regime changes is essential for sustainable water resources management in coastal *** this study,the enhanced harmonic analysis was applied to extract the seasonal variability of the M2 and K1 tidal amplitudes and phases at three gauging stations along Lingdingyang Bay of the Zhujiang River *** seasonal dynamics in terms of tidal wave celerity and amplification/damping rate were used to quantify the impacts of human-induced estuarine morphological alterations on M2 and K1 tidal hydrodynamics in inner and outer Lingdingyang *** results show that both tidal amplification/damping rate and wave celerity were considerably increased from the pre-anthropogenic activity period(Pre-AAP)to the post-anthropogenic activity period(Post-AAP)excepting the tidal amplification/damping rate in outer Lingdingyang Bay,and the variations in outer Lingdingyang Bay was larger than those in inner Lingdingyang *** alterations in these two parameters were more significant in flood season than in dry season in both inner and outer Lingdingyang *** seasonal variability of M2 and K1 tidal amplitudes were further quantified using a regression model accounting for the 18.61-year lunar nodal modulation,where this study observes a considerable alteration in M2 constituent owing to human *** the Post-AAP,the M2 amplitudes at the downstream station were larger than those that would have occurred in the absence of strong human interventions,whereas the opposite was true for the upstream station,leading to a substantial decrease in tidal amplification in outer Lingdingyang ***,it is opposite in inner Lingdingyang *** underlying mechanism can be primarily attributed to channel deepening and narrowing caused by human interventions,that resulted in substan

关键词： tidal dynamics S_(T)IDE model nodal modulation channel deepening tidal wave celerity

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