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Articles

No. 26 (2021)

Estimation of Nautical Chart Datum by the Statistical Method in Micro and Meso Tidal Regime : An Alternative to the Balay Harmonic Method

Submitted
October 24, 2022
Published
2021-11-30

Abstract

In coastal areas that have a great meteoceanographic influence in sea-level variability, the Chart Datum (CD) can be computed using the statistical method (SM), which considers the tidal and the non-tidal sea-level components. However, that method was not systematically evaluated along the Brazilian coast. In this work, the SM is compared with the harmonic method used to define the CD in Brazilian Nautical Charts. Both methods were applied in five tidal gauge stations, with simulations performed for different time range series. The results show that the method found a safe value in all the cases, being consistent even at microtidal regimen with significant meteorological influences.