Tidal current harmonic analysis and calculation method based on underway ADCP observation ocean current data

Abstract

The invention discloses a tidal current harmonic analysis and calculation method based on underway ADCP observation ocean current data. The method comprises the following steps: S1, carrying out underway observation preparation; S2, carrying out underway observation; S3, correcting a misalignment angle of the underway ADCP observation data; S4, removing error data; S5, carrying out blind area data processing; and S6, carrying out harmonic analysis and calculation. S1 comprises the following steps: selecting an object sea area for tide analysis, downloading long-term tide level or water level data near the object sea area, performing harmonic analysis on the data, and selecting main partial tide information; and according to the harmonic analysis result of the long-time sequence of the water level data, determining the dominant type of the object sea area and the diurnal tide and semi-diurnal tidepartial tide types. The invention provides an underway ADCP tide current observation method aiming at relatively short data observation time. By improving the tide current harmonic analysis method, the error in the solution can be well controlled, so that the obtained result is closer to the actual result.

Description

technical field [0001] The invention relates to a tidal current reconciliation analysis and calculation method, in particular to a tidal current reconciliation analysis and calculation method based on navigational ADCP observation ocean current data. Background technique [0002] The Qiongzhou Strait is one of the three major straits (Qiongzhou, Taiwan, and Bohai Sea) in China's coastal waters. It is between the Leizhou Peninsula in Guangdong Province and Hainan Island in Hainan Province. An important channel in the northern part of the South China Sea and the Beibu Gulf. The average width, length, and average water depth of the strait are approximately 25km, 70km, and 70m, respectively, and the maximum water depth exceeds 100m. The Qiongzhou Strait is an important traffic artery between Hainan Province and the mainland, and also a seawater exchange channel between the northern part of the South China Sea and the Beibu Gulf. The current in the strait plays an important role...

AI Technical Summary

Problems solved by technology

However, in reality, due to factors such as weather and waterway, the data observation time is often interrupted, and the complete phase of the tidal distribution cannot be completely covered, and there are certain random errors in the observation data, so the solution obtained by the classical harmonic analysis method has a large error , which deviates from the actual result

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