Analisis Pola Arus dan Transpor Sedimen Terhadap Fenomena Penggerusan Pilar Jembatan Suramadu menggunakan Pemodelan Hidrodinamika

Nurilhaq, Zidny Omnu (2024) Analisis Pola Arus dan Transpor Sedimen Terhadap Fenomena Penggerusan Pilar Jembatan Suramadu menggunakan Pemodelan Hidrodinamika. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Jembatan Suramadu merupakan infrastruktur vital di Selat Madura yang berperan penting dalam konektivitas ekonomi regional Jawa–Madura. Namun, karakteristik oseanografi kawasan ini, khususnya arus dua arah dan pengaruh musiman menimbulkan risiko penggerusan (scouring) pada pilar jembatan. Jika tidak dipantau secara berkala, fenomena ini dapat memicu kegagalan struktur. Penelitian ini bertujuan memodelkan pola arus dan transpor sedimen serta menganalisis dinamika penggerusan pilar dengan mempertimbangkan dominasi arus dua arah dan variasi musiman. Metodologi yang digunakan adalah pemodelan numerik berbasis perangkat lunak MIKE 21/3 dengan modul Hydrodynamics dan Mud Transport dengan menggunakan data input berupa batimetri, pasang surut, angin, debit sungai, jenis sedimen, dan gelombang. Simulasi dilakukan untuk periode Januari–Desember 2024, dan validasi model terhadap data pasang surut menunjukkan akurasi sangat baik dengan metode MAE sebesar 0,1473 m dan RMSE 0,1771 m. Hasil simulasi menunjukkan arus dominan bertipe bolak-balik arah barat–timur dengan kecepatan rata-rata 0,21–0,25 m/s yang relatif stabil sepanjang musim baik musim barat dan musim timur. Interaksi arus dengan pilar menimbulkan perlambatan aliran di sisi hulu dan percepatan di sisi samping pilar, yang memicu sedimentasi pada area datangnya arus dan erosi di sisi sebaliknya. Pilar P46, P47, dan P49 mengalami penggerusan tertinggi dengan nilai maksimum berturut-turut -0,250 m, -0,248 m, dan -0,246 m serta laju masing-masing -0,000641 m/hari, -0,000630 m/hari, dan -0,000626 m/hari. Sementara itu, pilar P37, P41, dan P56 menunjukkan kondisi lebih stabil. Tren erosi yang terbentuk pada musim barat berlanjut ke musim timur, menunjukkan pola penggerusan konsisten secara spasial dan temporal. Evaluasi ini memberikan dasar penting untuk prioritas pemantauan dan pemeliharaan struktur jembatan demi menjamin keberlanjutan infrastruktur sesuai dengan tujuan SDGs Nomor 9.
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The Suramadu Bridge is a vital infrastructure located in the Madura Strait, playing a key role in supporting regional economic connectivity between Java and Madura. However, the area's complex oceanographic characteristics—particularly the bidirectional current and seasonal variations—pose a significant risk of scouring around the bridge piers. If not regularly monitored, this phenomenon may lead to structural failure. This study aims to model the current patterns and sediment transport, as well as analyze the scouring dynamics around the bridge piers by considering dominant bidirectional flow and seasonal variability. The methodology employs numerical modeling using the MIKE 21/3 software with Hydrodynamics and Mud Transport modules, incorporating input data such as bathymetry, tides, wind, river discharge, sediment characteristics, and wave conditions. The simulation was conducted for the period of January to December 2024, and model validation against tidal data showed high accuracy with MAE of 0.1473 m and RMSE of 0.1771 m. The results indicate that the dominant current follows a tidal-driven bidirectional pattern (west–east) with a relatively stable average velocity ranging from 0.21 to 0.25 m/s throughout both the west and east monsoon seasons. Interaction between the current and bridge piers causes flow deceleration on the upstream side and acceleration along the lateral sides of the piers, triggering sediment deposition in the flow-facing areas and erosion in the zones with increased flow velocity. Piers P46, P47, and P49 experienced the most significant scouring with maximum depths of -0.250 m, -0.248 m, and -0.246 m, respectively, and corresponding scouring rates of -0.000641 m/day, -0.000630 m/day, and -0.000626 m/day. In contrast, piers P37, P41, and P56 exhibited more stable conditions. The erosion trends observed during the west monsoon persisted into the east monsoon, indicating spatially and temporally consistent scouring patterns. These findings provide a critical basis for establishing monitoring priorities to preserve the structural integrity of the Suramadu Bridge and ensure infrastructure sustainability in line with SDG Goal 9.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Current Patterns, Hydrodynamic Modeling, Scouring, Sediment Transport, Sustainable Infrastructure, Infrastruktur Berkelanjutan, Pemodelan Hidrodinamika, Penggerusan, Pola arus, Transpor Sedimen.
Subjects:	Q Science > QA Mathematics > QA278.2 Regression Analysis. Logistic regression Q Science > QA Mathematics > QA911 Fluid dynamics. Hydrodynamics Q Science > QE Geology > QE571 Sedimentation and deposition. Sediment transport. Erosion.
Divisions:	Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Geomatics Engineering > 29202-(S1) Undergraduate Thesis
Depositing User:	ZIDNY OMNU NURILHAQ
Date Deposited:	25 Jul 2025 02:03
Last Modified:	25 Jul 2025 02:03
URI:	http://repository.its.ac.id/id/eprint/120769

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