本文从统计学的角度,使用大通流量,江阴,天生,吴淞自1948年以来的水位资料,经周期图分离,过滤各类周期波和随机振动后进行分析,发现: (1)大通年平均流量有丰水期与少水期。 (2)江阴与天生受迳流影响有高水位期和低水位期,吴淤还受其海域来水的影响,1972—1980年出现另一个较高的水位期。此外各站无长期增减的趋势。 最后建立月平均流量与各站月平均水位的相关关系,对各港口逐月,逐旬的潮汐预报进行修正。 This paper analyzes the water level data of Chase, Jiangyin, Natural and Wusong since 1948 from the statistical point of view, separates the periodic map and filters various periodic waves and random vibrations. It is found that: (1) There are wet and dry periods. (2) In Jiangyin and its natural environment, there was a high water level and a low water level affected by the tidal current. Wushen was also affected by the incoming water from the sea and another higher water level occurred in 1972-1980. In addition, there is no long-term change in the trend of the station. Finally, establish the monthly average flow rate and the monthly mean water level of the station, the port monthly and late ten-day tide forecasts were revised.