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All Journal Jurnal Ilmu dan Teknologi Kelautan Tropis KAPAL Jurnal Ilmu Pengetahuan dan Teknologi Kelautan JURNAL RISET TEKNOLOGI KELAUTAN Civil Engineering Journal Journal TEPAT: Teknologi Terapan untuk Pengabdian Masyarakat EPI International Journal of Engineering Jurnal Penelitian Enjiniring Fakultas Teknik Unhas Zona Laut : Jurnal Inovasi Sains dan Teknologi Kelautan Riset Sains dan Teknologi Kelautan Collaborate Daily Book Series
Hasdinar Umar
Departemen Teknik Kelautan Fakultas Teknik Universitas Hasanuddin
Automotive Engineering Biochemistry, Genetics & Molecular Biology Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Library & Information Science Public Health Transportation

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Journal : Civil Engineering Journal

 1 
A Novel Exact Solution of Longshore Current and Its Application on Permeable Groin Umar, Hasdinar; Assidiq, Fuad M.; Triatmadja, Radianta; Baeda, Achmad Y.
Civil Engineering Journal Vol 11, No 2 (2025): February
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/CEJ-2025-011-02-07

Abstract

One major environmental problem exacerbated by longshore currents is beach erosion. Groins are a common defense tactic built perpendicular to the shore. However, conventional impermeable groins promote downstream erosion and disrupt sediment movement. Permeable groins provide a more environmentally friendly option, allowing some sediment to flow through. This study examines the effects of permeable groins on longshore currents. Permeable groins are not included in currently used longshore current equations. This study fills this gap by creating a new longshore current velocity equation considering permeable groins. The longshore current equation with the groin was developed based on the momentum equation in the longshore direction without the influence of lateral mixing and the assumption that base friction will rise due to the groin. Therefore, it was determined that the base shear stress after the groin was equal to the base shear stress plus the drag caused by the groin. The result shows that the longshore current equation through the groin is a function of the breaking wave parameter and the resistance parameter owing to the groin. Longshore current velocities with and without permeable groins of different densities were measured in wave basins. We collected information on groin characteristics, current velocities, and breaking wave heights. This investigation validates the shortcomings of the current equations. Doi: 10.28991/CEJ-2025-011-02-07 Full Text: PDF
Assessing Sediment Transport and Shoreline Dynamics in High-Energy Tropical Coasts Umar, Hasdinar; Paotonan, Chairul; Rachman, Taufiqur; Nur, Sitti Hijraini; Muhiddin, Amir H.; Maming, Muhammad Idhil; Andriadi, Andi M. Rezky; Assidiq, Fuad Mahfud
Civil Engineering Journal Vol. 11 No. 7 (2025): July
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/CEJ-2025-011-07-022

Abstract

This research examines coastal erosion in North Galesong, Indonesia, by validating longshore sediment transport (LST) equations and predicting shoreline changes over ten years. To evaluate sediment movement and coastline alterations, it integrates field data on sediment grain size and wave characteristics with numerical modeling techniques, including the CERC equation and finite difference methods. Sieve analysis revealed a range of sediment textures (D50: 0.17–0.65 mm), predominantly medium-fine sand. Wave analysis indicated a dominance of moderate energy southwesterly waves (1.5 m height, 6.39 s period) that aid sediment transport. The empirical LST models, calibrated with local data, closely matched numerical simulations (error <20%), predicting an annual net northward sediment transport of 406,869 m³. Shoreline analysis across 15 segments showed significant spatial variability: severe erosion occurred in Cell 4 (Δy = -0.82 m), while Cell 3 saw accretion (Δy = +0.68 m), influenced by wave direction, sediment supply, and coastal morphology. This study underscores the value of hybrid empirical-numerical methods in data-scarce regions and emphasizes the need for local model calibration to enhance coastal resilience. The findings inform sustainable management practices, promoting adaptive strategies to address sediment imbalances and hydrodynamic changes due to climate factors.
Co-Authors ., Ashury A. Arwin Amiruddin Abdurrahman, Muh. Asad Achmad Yasir Baeda Achmad Yasir Baeda Adisasmita, Sakti Adji Alie, Muh. Zubair Andriadi, Andi M. Rezky Ariska Ariska Assidiq, Fuad M. Assidiq, Fuad Mahfud Baeda, Achmad Y. Baeda, Achmad Yasir Baeda Yasir Bulawan, Chofifah Datu Caronge, Muhammad Akbar Chairul Paotonan Chairul Paotonan Chairul Paotonan Daeng Paroka Daeng Paroka Daeng Parokka Deni Mulyawan dj, ashury F.M. Assidiq Firman Husain Hasan, Wahyuni Humairah, Indah Putri Ichwanul Haq Bahtiar Ilham Alkhaer Ilham Alkhaer Indah Puspita Sari, Indah Puspita Juswan . Juswan Sade K, Riswal Kurniawan, Abdi Maming, Muhammad Idhil Muhammad Zubair M Alie Muhammad Zubair Muis Alie Muhiddin, Amir H. Munadiah, Nurul Nadjmi, Nurul Nasir, Andi Mega Mustika Nizam Nizam Novriany Amaliyah Nur Yuwono Pairunan, Teguh Pongmada, Silman Radianta Triadmadja Rahman, Sabaruddin Rahman Rahmi Amin Ishak Sabaruddin Rahman Sabaruddin Rahman Sabaruddin Rahman Sabaruddin Rahmanr Sakinah, Whina Sitti Hijraini Nur Taufiqur Rachman Taufiqur Rachman Taufiqur Rachman Taufiqur Rachman Taufiqurrahman Taufiqurrahman Tuharea, Natasha Dewanti Umar, Muh. Fitrah Ramadhan