| Tidal current has an important impact on marine traffic safety and ecological protection, and the characteristics of tidal current is of great significance for tidal current prediction, navigation safety and scientific research. Due to the short duration of daily tidal current observation data, the analysis of tidal current characteristics is often not accurate and reliable. In this paper, the quasi-harmonic analysis method introducing of difference ratio relation is used to analyze the observed daily tidal current data of hydrographic survey, and the method of tidal current portrayal is briefly introduced. Taking the current tidal data of the southern sea area of Shandong Peninsula as an example,the results indicate that this method can provide more reliable tidal current characteristic values for the observed sea area, and provide basic data guarantee for navigation safety and marine development. Meanwhile, the research method in this paper will also provide reference for the analysis of the daily tidal current observation data of hydrographic survey. |
