The Effect of Discharge, Sediment Transport, Tidal and Land Subsidence in The River Flood Risk Management: Case Study of Sayung River

Indonesia’s extensive coastline and tropical climate make it highly vulnerable to flooding, particularly in coastal regions like the Sayung River in Central Java. This study focuses on flood drivers such as land subsidence, sedimentation, and tidal factors, which have caused severe damage to areas l...

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Bibliographic Details
Published in:Journal of physics. Conference series 2024-12, Vol.2916 (1), p.012017
Main Authors: Nugroho, Eka Oktariyanto, Pranatan, Angga Yoga, Soekarno, Indratmo, Moerwanto, Arie Setiadi, Wulandari, Siska, Nurkhaerani, Fatma, Syakira, Hana, Sadat, Sayed Hashmat
Format: Article
Language:English
Subjects:
Coastal management
Coastal zone
Discharge
Flood management
Floods
Polders
Risk management
Sediment control
Sediment transport
Sedimentation
Sedimentation & deposition
Subsidence
Tide prediction
Two dimensional flow
Unsteady flow
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Summary:Indonesia’s extensive coastline and tropical climate make it highly vulnerable to flooding, particularly in coastal regions like the Sayung River in Central Java. This study focuses on flood drivers such as land subsidence, sedimentation, and tidal factors, which have caused severe damage to areas like Semarang and Demak. Three analyses were conducted: the first employed an unsteady flow model with upstream discharge (Q25) and downstream tidal input. The second used a quasi-unsteady flow model with daily discharge and tidal input. The third was a 2D simulation predicting conditions for the 10th, 20th, and 50th years, factoring in tides, subsidence, sea level rise, and sedimentation. Sediment control measures for the 10th year include embankment construction and channel maintenance, while medium- and long-term solutions involve implementing a polder system with a weir, spillway, reservoir (+4.85 million m3), and pump capacity (+52.45 m3/s). These integrated approaches provide critical insights for flood management in coastal regions threatened by climate change and land degradation.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/2916/1/012017