Analisis Spasial Variabilitas Tipe Pasang Surut di Selat Madura Bagian Barat Dengan Menggunakan Pemodelan Hidrodinamika

Farhan, Muhammad (2026) Analisis Spasial Variabilitas Tipe Pasang Surut di Selat Madura Bagian Barat Dengan Menggunakan Pemodelan Hidrodinamika. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Pasang surut air laut dipengaruhi oleh gaya gravitasi Bulan dan Matahari serta kondisi morfologi perairan, seperti kedalaman dan penyempitan selat, yang dapat menyebabkan variasi spasial karakteristik dan tipe pasang surut. Selat Madura bagian barat memiliki morfologi yang kompleks sehingga berpotensi menimbulkan perbedaan tipe pasang surut secara spasial. Penelitian ini bertujuan untuk menganalisis variabilitas spasial tipe pasang surut di wilayah tersebut melalui pemodelan hidrodinamika. Pemodelan dilakukan menggunakan Delft3D dengan resolusi grid 200 × 200 meter selama satu tahun, menggunakan data batimetri GEBCO, data angin ECMWF, serta konstanta pasang surut dari model TPXO. Hasil pemodelan divalidasi menggunakan data pengamatan pasang surut dari stasiun Badan Informasi Geospasial (BIG) Surabaya dan menghasilkan nilai Root Mean Square Error (RMSE) sebesar 0,18 m yang menunjukkan kinerja model yang baik. Hasil model selanjutnya dianalisis secara harmonik menggunakan program T-Tide untuk memperoleh amplitudo dan fase konstanta pasang surut utama (M2, S2, K1, dan O1), yang kemudian digunakan untuk menyusun peta co-range dan peta tipe pasang surut berdasarkan nilai Formzahl. Hasil analisis menunjukkan bahwa amplitudo K1 berkisar 0,4–0,5 m, O1 sebesar 0,2–0,3 m, M2 sebesar 0,25–0,50 m, dan S2 sebesar 0–0,40 m. Pola perambatan fase menunjukkan bahwa konstanta diurnal (K1 dan O1) berasal dari dua arah, yaitu Selat Madura bagian timur dan Laut Jawa, sedangkan konstanta semidiurnal (M2 dan S2) merambat dari timur ke barat. Hasil pemetaan menunjukkan bahwa wilayah penelitian didominasi oleh tipe pasang surut campuran dengan kecenderungan dominasi diurnal dan semidiurnal dengan rentan nilai fromzhal 0,75 sampai 2,25.
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Tides are influenced by the gravitational forces of the Moon and the Sun as well as the morphological characteristics of coastal waters, such as depth and channel constriction, which can lead to spatial variations in tidal characteristics and types. The western part of the Madura Strait has a complex morphology that potentially results in spatial differences in tidal types. This study aims to analyze the spatial variability of tidal types in the region through hydrodynamic modeling. The simulation was conducted using Delft3D with a grid resolution of 200 × 200 meters over a one-year period, utilizing GEBCO bathymetric data, ECMWF wind data, and tidal constituents from the TPXO model. The model results were validated using observed tidal data from the Geospatial Information Agency (BIG) station in Surabaya, yielding a Root Mean Square Error (RMSE) of 0.18 m, indicating good model performance. The model outputs were further analyzed using harmonic analysis with the T-Tide program to obtain the amplitudes and phases of the main tidal constituents (M2, S2, K1, and O1), which were then used to construct co-range maps and tidal type maps based on Formzahl values. The results show that the amplitude of K1 ranges from 0.4 to 0.5 m, O1 from 0.2 to 0.3 m, M2 from 0.25 to 0.50 m, and S2 from 0 to 0.40 m. Phase propagation patterns indicate that diurnal constituents (K1 and O1) originate from two directions, namely the eastern Madura Strait and the Java Sea, while semidiurnal constituents (M2 and S2) propagate from east to west. Spatial mapping results indicate that the study area is dominated by mixed tidal types with both diurnal and semidiurnal dominance, with formzahl values ranging from 0.75 to 2.25.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Co-Tidal Chart, Pasang Surut Air Laut, Pemodelan Hidrodinamika, Selat Madura, Tipe Pasang Surut Air Laut, Co-Tidal Chart, Hydrodynamic Modeling, Madura Strait, Sea Tides, Tidal Regime
Subjects:	Q Science > QA Mathematics > QA911 Fluid dynamics. Hydrodynamics Q Science > QB Astronomy > QB415.2 Tides.
Divisions:	Faculty of Civil Engineering and Planning > Geomatics Engineering > 29202-(S1) Undergraduate Thesis
Depositing User:	Muhammad Farhan
Date Deposited:	28 Jul 2026 02:41
Last Modified:	28 Jul 2026 02:41
URI:	http://repository.its.ac.id/id/eprint/137996

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