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Abstract
Sediment accumulation in the Tangga and Sigura-Gura Dams, which are integral parts of the Asahan River hydropower generation system, has significantly reduced their effective reservoir capacity. This issue disrupts operational efficiency and increases the risk of infrastructure damage. This study aims to conduct a technical and economic analysis of three hydraulic dredging system configurations using a Cutter Suction Dredger (CSD) combined with Floating Booster Pumps and a land-based booster pump, in order to determine the most optimal system for sediment removal. Technical evaluation was conducted using the Darcy–Weisbach equation to assess energy loss (head loss), along with a cavitation risk analysis based on the Net Positive Suction Head (NPSH) parameter. Cost analysis referred to the 2025 Unit Price Analysis (AHSP) published by the Indonesian Ministry of Public Works. The results indicate that the configuration comprising 1 CSD unit, 1 submersible pump, 2 floating booster pumps in parallel, and 1 land-based booster pump is the most efficient system. It delivers a slurry flow rate of 600 m³/hour, a total head loss of 72.7 meters, and completes the dredging process within 3 months at a unit cost of Rp147,202.47/m³. Therefore, this configuration is considered technically and economically optimal, and supports the long-term sustainability of hydropower generation operations in the upstream area of the Asahan River.
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References
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- F. Rahman and K. Yusuf, ‘Sustainable Sediment Management’, Journal of Environmental Hydraulics, 2020.
- L. Zhang and H. Wu, ‘Numerical Simulation of Cavitation’, Advances in Mechanical Engineering, 2021.
- M. Z. D. Saputra, ‘Efisiensi Sistem Pompa pada Proyek Irigasi’, Jurnal Teknik FT UNRIKA, 2021.
References
M. Zulfan et al., ‘ANALISIS KERUNTUHAN TUBUH BENDUNGAN AKIBAT OVERTOPPING PADA BENDUNGAN GINTUNG KABUPATEN PURBALINGGA ALTERNATIF 1’, 2024. [Online]. Available: http://jurnal.polinema.ac.id/
I. Z. Nisa, ‘Manajemen Waduk dan Kinerja PLTA di Sumatera’, Jurnal Teknik Sipil FT Unsoed, 2022.
R. Patel, ‘Slurry Pipeline Design for Sediment Transport’, International Journal of Fluid Engineering, 2019.
A. Kausar and others, ‘Optimization of Hydraulic Dredging Systems’, Water Resources Management, 2020.
M. Hossain and A. Rahim, ‘Cost Estimation for Dredging Projects’, International Journal of Project Management, 2021.
I. Zahrotin Nisa’ et al., ‘PERANCANGAN NORMALISASI SUNGAI BOGOWONTO BAGIAN HILIR KAWASAN STRATEGIS NASIONAL YOGYAKARTA INTERNATIONAL AIRPORT’, 2023. [Online]. Available: http://jos-mrk.polinema.ac.id/
S. Kumari and A. Verma, ‘Dredging Equipment Performance and Sediment Flow’, Applied Mechanics and Materials, 2020.
R. Ahmad and M. Mahendra, ‘Evaluation of Dredging Design for Sediment Management’, Journal of Sustainability, vol. 13, no. 2, pp. 112–120, 2021.
Y. Wang and J. Li, ‘Cutter Suction Dredger Efficiency Model’, Ocean Engineering, 2022.
F. Rahman and K. Yusuf, ‘Sustainable Sediment Management’, Journal of Environmental Hydraulics, 2020.
L. Zhang and H. Wu, ‘Numerical Simulation of Cavitation’, Advances in Mechanical Engineering, 2021.
M. Z. D. Saputra, ‘Efisiensi Sistem Pompa pada Proyek Irigasi’, Jurnal Teknik FT UNRIKA, 2021.