中文摘要：

分别利用闸坡验潮站1975和1978年逐时潮位资料求算各自的调和常数并进行对比，验证调和常数的稳定性。结果发现，用1年逐时潮位数据进行调和常数的求算是可信的。调和常数是否稳定决定了进一步计算的非调和常数、潮位频率分布和2小时乘高潮位频率分布的可靠性。对后两者的计算，分别采用BPF方法和统计方法加以对比，以检验BPF方法的稳定性。研究表明，在只有1年逐时潮位数据的情况下，应用BPF方法进行潮位频率分布计算和2小时乘高潮位频率计算是可行的。分析结果较好地反映了闸坡海域的潮汐特征。

英文摘要：

By using the data of hourly tidal level of Zhapo tidal station in 1975 and 1978, harmonic constants are calculated respectively and the results are compared to testify the stability of the harmonic constants. It＇s found that the annual hourly tidal level data can be relied on for calculating the harmonic constants. The accuracy of further calculations of the nonharmonic constants, frequency distribution of tidal level and high tidal level with the multiplier 2 hours are all dependent on the results of the harmonic constants derived above. Calculations of the nonharmonic constants will be different if the type of the harbor changes. And the latter two are derived from both the BPF and the statistics methods, which show the reliability of the BPF method when there is only one year hourly tidal level data. Research has shown that the BPF method can be trusted to derive frequency distribution of tidal level and high tidal level with the multiplier 2 hours as long as one year hourly tidal level data is obtined. The results of the tidal characteristics in Zhapo sea waters are preferably indicated in the paper.