| Aiming at the problem that the conventional linear interpolation water level model does not consider the direction of tidal propagation, which leads to the low accuracy of water level, this paper proposes a linear interpolation method considering the direction of tidal propagation. Firstly, based on the synchronous observation data of the tidal stations in the survey area, the tidal propagation direction is derived by using the tidal propagation time difference between the three tidal stations. Then, after taking into account the direction of tidal propagation, the conventional linear interpolation model is improved to calculate more accurate water level data. Finally, based on the measured water level data, the results show that under the experimental data in this paper, the accuracy of the water level data obtained by the conventional linear interpolation method is about 8.4 cm. When taking into account the direction of tidal propagation, the accuracy is about 3 cm, which is about 64 % higher than that of the time difference method and the difference ratio method. In terms of running time, both the time difference method and the difference ratio method take about 0.9 s, and the method in this paper takes about 0.8 s, which is better than the time difference method and the difference ratio method. Therefore, the proposed method can effectively make up for the limitations of the traditional linear interpolation method, and has certain reference significance for improving the applicability of the traditional linear interpolation method. |
