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Volume 137
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Proceeding Paper

Analysis of Flood Water Level Profiles and Scouring Potential for a 200-Meter Span Suspension Bridge †

by
Rusandi Noor
*,
Ikhwan Nur Rizal
and
Aulia Zainah Az-Zahra Ramadhani
Department of Civil Engineering, Universitas Muhammadyah Kalimantan Timur, Samarinda 75124, Indonesia
*
Author to whom correspondence should be addressed.
†
Presented at the 9th Mechanical Engineering, Science and Technology International Conference (MEST 2025), Samarinda, Indonesia, 11–12 December 2025.
Eng. Proc. 2026, 137(1), 16; https://doi.org/10.3390/engproc2026137016
Published: 3 June 2026
(This article belongs to the Proceedings of The 9th Mechanical Engineering, Science and Technology International Conference (MEST 2025))
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Abstract

This study analyzes the scouring characteristics of the Mahakam River section to support bridge design and safety assessments. Using a 100-year return period, the design rainfall was determined to be 1246 mm via the Log Pearson III method, resulting in a peak design flood discharge (Q100) of 77,984 m3/s. Hydraulic analysis using a rating curve indicates a flood water level elevation of 32.578 m from the riverbed. Scouring calculations, including construction and stream scouring, were performed using Laursen’s and empirical methods. The results show a total scouring depth of 4.8 cm/year, primarily driven by stream scouring, as construction scouring was zero under current existing conditions. These findings emphasize the necessity of bank protection, such as gabions, to mitigate erosion risks for future infrastructure.
Keywords: Mahakam River; flood discharge; rating curve; stream scouring; bridge hydraulics; log Pearson iii; sediment transport Mahakam River; flood discharge; rating curve; stream scouring; bridge hydraulics; log Pearson iii; sediment transport

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MDPI and ACS Style

Noor, R.; Rizal, I.N.; Ramadhani, A.Z.A.-Z. Analysis of Flood Water Level Profiles and Scouring Potential for a 200-Meter Span Suspension Bridge. Eng. Proc. 2026, 137, 16. https://doi.org/10.3390/engproc2026137016

AMA Style

Noor R, Rizal IN, Ramadhani AZA-Z. Analysis of Flood Water Level Profiles and Scouring Potential for a 200-Meter Span Suspension Bridge. Engineering Proceedings. 2026; 137(1):16. https://doi.org/10.3390/engproc2026137016

Chicago/Turabian Style

Noor, Rusandi, Ikhwan Nur Rizal, and Aulia Zainah Az-Zahra Ramadhani. 2026. "Analysis of Flood Water Level Profiles and Scouring Potential for a 200-Meter Span Suspension Bridge" Engineering Proceedings 137, no. 1: 16. https://doi.org/10.3390/engproc2026137016

APA Style

Noor, R., Rizal, I. N., & Ramadhani, A. Z. A.-Z. (2026). Analysis of Flood Water Level Profiles and Scouring Potential for a 200-Meter Span Suspension Bridge. Engineering Proceedings, 137(1), 16. https://doi.org/10.3390/engproc2026137016

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