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All Journal KAPAL Jurnal Ilmu Pengetahuan dan Teknologi Kelautan REKAYASA IJOCE (International Journal of Offshore and Coastal Engineering) Abdi Dosen : Jurnal Pengabdian Pada Masyarakat Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse) Sewagati Journal of Public Health and Pharmacy
Muhammad Zikra
Teknik Kelautan, Institut Teknologi Sepuluh November Surabaya
Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Mechanical Engineering Medicine & Pharmacology Physics Public Health Social Sciences Other

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Numerical Simulation of Wave Run-Up on Coastal Structure with Hexaloc Armour Units based on the SPH Method Ghazali Hafiz, Muhammad Brilliant Danu; Armono, Haryo Dwito; Zikra, Muhammad
Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Vol 23, No 1 (2026): Article in Press
Publisher : Department of Naval Architecture - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/kapal.v23i1.78197

Abstract

Coastal abrasion and erosion pose a threat to shoreline stability in Indonesia, necessitating the implementation of reliable coastal protection structures, such as breakwaters. Accurate prediction of wave run-up is essential, as crest elevation is crucial, as it directly determines structural safety and the level of protection provided. This study aims to analyse wave run-up on rubble-mound breakwaters with Hexaloc armour units using the Smoothed Particle Hydrodynamics (SPH) method in DualSPHysics, to improve the accuracy and efficiency of design. The numerical model was developed using AutoCAD, SketchUp and simulated under varying wave heights (0.05 – 0.13 m), periods (1.1 – 1.5 s), and one versus two layer armour configurations. Validation was carried out by comparing simulation results with analytical and empirical formulations, particularly Ahrens’ equation. The results indicate that relative run-up ( ) increases with the Iribarren number but tends to stabilize at higher values. Numerical simulations produced run-up ratios ranging from 0.56 – 1.66 for a single layer and 0.63 – 0.86 for a double layer, while theoretical predictions yielded higher values of 1.59 – 2.39. The comparison demonstrates that single-layer Hexaloc arrangements produced slightly higher run-up than double layers, due to increased permeability. A strong correlation was obtained between SPH results and Ahrens’s theory, with a coefficient of determination of  for a single layer,  for a double layer, confirming that both approaches yield consistent outcomes.
Model Planning of Maintenance Dredging (Study Case: East Java Pultipurpose Terminal at Lamongan Shorebase) Rhamadani, Tasya Putri; Zikra, Muhammad; Sambodho, Kriyo
International Journal of Offshore and Coastal Engineering Vol. 9 No. 2 (2025):
Publisher : Department of Ocean Engineering

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962//j225800914.v9i2.8935

Abstract

As one of the important entities in the sea transportation process chain, the port has a vital role as a connection point between regions. East Java Multipurpose Terminal (EJMT) is one of the port terminals which will be used as a connection point for the distribution of goods, especially around East Java Province. The purpose of this paper is to obtain effective and efficient model scenario for maintenance dredging plan at EJMT. The method used in this research is optimization method with a non-linear algorithm approach to determine the minimum cost. The results of this study indicate that the dredging scenario using sediment traps is the most optimum with the total volume of material dredged is 107,671.61 m3. The total duration of the dredging work is around 7 days with total cost around 7.1 billion rupiah or equivalent to 65-70 thousand rupiah per cubic meter
Co-Authors Aji Satria, Muhammad Arwan Arwan Ashfar, Putika Dewi Satria Ahmar Dwito Armono, Haryo Fahmi, Muhammad Baharudin Farisi, Muhammad Al- Firmansyah Firmansyah Frestiqauli, Santi Ghazali Hafiz, Muhammad Brilliant Danu Handayanu Handayanu Haryo Dwito Armono Hashimoto, Noriaki Hashimoto, Noriaki Herman Pratikno, Herman Ikhwani, Hasan Jamaludin M Sakung Kriyo Sambodho Lorentius, Suratno Mitsuyasu, Kodama Muhammad Sabri Syahrir Mukhtasor Mukhtasor Naturezza, Defian Plant, Nathaniel G. Pratikto, Agoes Rhamadani, Tasya Putri Sadli Syam Shade Rahmawati Sitti Rahmawati Sri Hastuti Virgianti Pulukadang Suzuki, Kojiro Suzuki, Kojiro Wirayuhanto, Harish Wisnu Wardhana Yamashiro, Masaru Yamashiro, Masaru