针对国内外潮滩与潮汐相互作用研究中存在的不足，特别是缺乏对人类活动密集型强潮河口潮滩变化影响远程潮汐特征的机理研究，以潮滩变化较大的杭州湾为例，基于高分辨率监测数据、高效能非结构化网格水动力数值模型，结合概化地形理论分析，研究杭州湾潮滩变化对其局地和远程潮汐特征的影响。重点揭示不同潮滩变化引起的底床摩阻、趋浅效应和对流作用等过程变化，进而影响局地和远程余流、潮混合和潮能等潮汐特征的作用机理。通过高分辨率地形网格、多样化底摩阻参数、多时空验证等途径，提高数值模型的效能。通过数值模拟、通量分析、潮汐调和分析和差异分析等方法，分析潮滩不同变化对潮汐的影响特征。通过概化地形理论分析优选关键影响因子，并嵌入数值模型，研究杭州湾潮滩变化影响潮汐特征的科学机理。该项目可望在人类活动密集型强潮河口潮滩变化影响远程潮汐特征的机理研究方面取得较有创新特色的研究结果，具有重要的科学价值。

The local and far-field impacts of man-induced tidal flat variations on tidal dynamics in a macro-tidal estuary, Hangzhou Bay, are numerically modeled using the Finite Volume Coastal Ocean Model combined with sketched-geometry theoretical model and observationally studied by detailed field measurements. The calibrated hydrodynamic model, which uses high-resolution unstructured grids, special-various bottom stress on tidal flat, has good performance to reproduce the hydrodynamics in Hangzhou Bay. Then, the impacts of tidal flat variations on shallow water tides, and then on local and far-field tidal residual, mixing and tidal energy, are analyzed and determined. Finally, tidal flat variations impact the bottom stress, advection and shoaling effects. The sketched-geometry theoretical model is used to find out the key impact factors. The key impact factors are then incorporated in the numerical model to study the mechanism of these changes on the generation and dissipation of shallow water tides, and then impacts the tidal residual, mixing and energy. This study is scientifically essential for the mechanism of tidal flat variation on tides in a macro-tidal estuaries with high-intensity of human activities.