METODE KUADRAT TERKECIL UNTUK ANALISIS KONSTANTA HARMONIK PASANG SURUT AIR LAUT DI PULAU GILI RAJA, KABUPATEN SUMENEP, MADURA

Abstract

ABSTRAK Gili Raja Island is a small island located in Gili Genting District, with the entire area located on the coast. The primary access to this island is the sea route, where oceanographic conditions such as tides are very influential. This study examines the tidal characteristics on the island of Gili Raja, Sumenep Regency, using the Least Squares method. Tidal data were obtained from the Meteorological, Climatological, and Geophysical Agency (BMKG) in April 2015. The research conducted shows that the tidal type on Gili Raja's island is Diurnal with a Formzahl number of 3.55 (F> 3.0). This type describes that there is one high tide and one low tide. However, several times there were also two tides and two ebbs with very different heights and periods. The calculation using the least-squares method produces nine harmonic components, including M2, S2, N2 and K2, which form multiple daily tides. K1, O1 and P1 are the harmonic components forming a single daily tidal type, and the following components are M4 and MS4. The value obtained for each harmonic component is the amplitude value and phase difference.