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文章论述长江口水文情势。阐明形成本地区潮位变化的影响机制是海洋潮汐的周期性涨落;构成潮位特征值大辐度变化的重要因素是台风暴潮。着重分析了长江口的可能最高潮位的主要组成成份——台风增水,暴雨增水和天文潮位。 选择高桥作为长江口代表站,进行累加频率和抽样误差之计算,得到长江口可能最高潮位。千年一遇为 6.86米（H_(0.1%)= 6.86 m）,万年一遇为 7.67米 （H_(0.10%)= 7.67m.）
Article discusses the Yangtze River Estuary hydrological situation. It is clarified that the mechanism of the formation of the tide level changes in this region is the cyclical fluctuations of ocean tides. The important factor that forms the large-scale variation of the tidal-level eigenvalues is the typhoon storm surge. Emphasis is placed on the analysis of the major constituents of the possible highest tide levels in the Yangtze River Estuary - typhoon increase, rainstorm increase and astronomical tide levels. Select Takahashi as a representative of the Yangtze River Estuary, the cumulative frequency and sampling error calculation, the Yangtze River estuary may be the highest peak. The once-in-a-thousand-year event was 6.86 meters (H 0.1% = 6.86 m), while the annual average was 7.67 meters (H 0.10% = 7.67 meters)