Tidal Analysis Using Least Square Method at Luwu Timur Waters

Abstract

The tidal seas is the changing of sea water height caused by the attractive force happen between the earth and the space objects. The moon and the sun have the biggest influence on the tidal seas phenomenon. Analysis of tidal components can be done with several methods, namely least square method, admiralty and so forth. The least square method is a tidal harmonic analysis method used to analyze and to predict tides in this research. Daily observation data of 30 days in each hour was taken in August 7 until September 5, 2021. The analysis was carried out using tidal data in the waters around the port of Lampia. The water level data was obtained by observing for 30 days and has been analyzed using the least square method to get the tidal components. The tidal type in Luwu Timur waters is classified as mixed tide prevailing semidiurnal, where the Formzhal number is 0.71 (0.25 <F < 1.50). The tidal datums obtained are LLWS (0 cm), MSL (147 cm), HHWS (264 cm).