Kuncoro, Wahyu Adi (2026) Pengembangan Model Pasang Surut Regional Indonesia Melalui Integrasi Model Global dan Pemodelan Hidrodinamika (Studi Kasus: Perairan Kepulauan Nusa Tenggara). Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Pasang surut berperan penting dalam aktivitas maritim, namun model global memiliki keterbatasan di wilayah kepulauan kompleks seperti Kepulauan Nusa Tenggara. Penelitian ini bertujuan mengembangkan model pasang surut regional menggunakan perangkat lunak Delft3D dengan Batimetri Nasional (BATNAS) dan syarat batas (boundary forcing) dari model global TPXO10v2a. Data model global DTU23 dan TPXO10v2a, serta observasi dari 14 stasiun pasang surut Badan Informasi Geospasial (BIG) digunakan sebagai pembanding dan validasi simulasi selama satu tahun. Hasil evaluasi menunjukkan model regional mampu merepresentasikan dinamika pasang surut dengan sangat baik, menghasilkan rata-rata Root Mean Square Error (RMSE) 0,115 m, Mean Absolute Error (MAE) 0,093 m, dan koefisien korelasi (r) 0,979. Performa ini mengungguli model global dengan peningkatan akurasi rata-rata berbasis RMSE masing-masing sebesar 11,18% terhadap TPXO10v2a dan 5,67% terhadap DTU23. Selain akurasi elevasi, model regional berhasil memetakan karakteristik spasial pasang surut secara detail, meliputi distribusi amplitudo, fase, tipe pasang surut, tidal range, dan tidal datum di wilayah Nusa Tenggara. Hasil penelitian ini diharapkan dapat mendukung sistem prediksi pasang surut dan pengelolaan wilayah pesisir di Indonesia.
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Tides play a crucial role in maritime activities, yet global ocean tide models still exhibit limitations in representing complex coastal waters and island regions, such as the Nusa Tenggara Islands. This study aims to develop a regional tidal model using the Delft3D software by utilizing the harmonic constants from the TPXO10v2a global model as boundary forcing. Gridded bathymetry from Batimetri Nasional (BATNAS) was used as the model topography, while data from the DTU23 and TPXO10v2a global model and observations from 14 Badan Informasi Geospasial (BIG) tide gauge stations were utilized for comparison and validation over a one-year simulation period. The evaluation results demonstrate that the regional model effectively reproduces tidal dynamics, yielding an average Root Mean Square Error (RMSE) of 0.115 m and an Mean Absolute Error (MAE) of 0.093 m. This performance outperforms the global models, showing an average accuracy improvement based on RMSE of 11.18% against TPXO10v2a and 5.67% against DTU23. The reliability of the model is further confirmed by linearity tests, achieving the highest average correlation coefficient (r) of 0.979, which surpasses TPXO10v2a at 0.969 and DTU23 at 0.975. Beyond accurate water level elevation, the regional model successfully maps detailed spatial tidal characteristics, including amplitude and phase distributions, tidal types, tidal ranges, and local tidal datums across the Nusa Tenggara region. The findings of this study are expected to support the development of tidal prediction systems and coastal zone management in Indonesia.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Pasang Surut, Delft3D, Pemodelan Hidrodinamika, Model Global, Kepulauan Nusa Tenggara, Tides, Delft3D, Hydrodynamic Modeling, Global Ocean Tide Models, Nusa Tenggara Islands |
| Subjects: | G Geography. Anthropology. Recreation > GC Oceanography > GC89 Sea Level Q Science > QA Mathematics > QA911 Fluid dynamics. Hydrodynamics Q Science > QB Astronomy > QB415.2 Tides. |
| Divisions: | Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Geomatics Engineering > 29202-(S1) Undergraduate Thesis |
| Depositing User: | Wahyu Adi Kuncoro |
| Date Deposited: | 17 Jul 2026 07:22 |
| Last Modified: | 17 Jul 2026 08:45 |
| URI: | http://repository.its.ac.id/id/eprint/135277 |
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