Journal of Marine Sciences ›› 2024, Vol. 42 ›› Issue (2): 91-103.DOI: 10.3969/j.issn.1001-909X.2024.02.009

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Analysis of the tidal characteristics along the tidal reach of Xijiang River based on high and low tide levels

WU Jiaxing1,2,3, PENG Qi3, ZHANG Zhuo1,2,3,*, CHEN Xinying1,2,3, CHEN Peng1,2,3, WEN Yajuan1,2,3, WANG Haocheng1,2,3, ZHANG Lu1,2,3   

  1. 1. Key Laboratory of Virtual Geographic Environment, MOE, Nanjing Normal University, Nanjing 210023,China
    2. Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing 210023, China
    3. Key Laboratory of Coastal Disaster and Defence, MOE, Hohai University, Nanjing 210023, China
  • Received:2023-07-23 Revised:2024-02-26 Online:2024-06-15 Published:2024-08-09
  • Contact: ZHANG Zhuo

Abstract:

By interpolation of high and low tide data and application of NS_TIDE model, the tidal characteristics of the tidal reach of Xijiang River (Makou-Dahengqin) were analyzed. Compared with cubic spline interpolation and linear interpolation, it is found that Hermite interpolation is the best method to simulate the hourly tide level. The verification results of tide level show that the overall error of NS_TIDE model is low, and the outliers mainly come from the influence of typhoon and flood. The mean water level and the amplitude of tidal component in the tidal reach of Xijiang River are different in wet and dry season. The influence of runoff in the upper reaches is greater than that of the tides, and the opposite is true in the lower reaches. With the increase of runoff and tidal difference, the mean water level of the upper reaches increases, and the influence on the amplitude and the phase of tidal component is different in different section, which is related to the spatial location and the frequency of the tidal component.

Key words: high and low water interpolation, harmonic analysis, river discharge, ocean tides

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