In order to enhance the accuracy of water level correction,this paper utilizes the comprehensive tidal representation principle based on multi-point tide synthesis to calculate instantaneous tidal phase differences between stations.The periodic patterns of inter-station tidal phase differences are explored.The study investigates the impact of phase difference deviations on water level interpolation accuracy and provides a detailed analysis of the interpolation errors in relation to the position and phase of tide at the interpolation points,as well as the dependency on the tidal characteristic states during the water level interpolation period.The following patterns are summarized:under linear propagation conditions,spatially,the weakest accuracy occurs in the central part of the control region;temporally,the weakest accuracy is observed during minor tidal periods,particularly at the time of the fastest rise and fall tide(i.e.,zero-crossing)in each tidal cycle.Although the short-term adjustments during minor tidal periods exhibit more pronounced effects,the water level correction errors during major tidal periods are greater.A comparative analysis between astronomical and statistical time-varying tidal corrections,utilizing observed water level data,validates the effectiveness of the proposed time-varying tidal correction method in improving water level correction accuracy.
关键词
水位改正/时变时差/分潮合成/精度评估/潮汐状态
Key words
water level correction/time-varying time-difference/tidal constituent synthesis/accuracy assessment/tidal state
维普
万方数据