Optimising E-Fence porosity for sediment retention: a case study in micro-tidal beaches

Rodzee, Muhammad Fauzi and Zainuddin, Siti Nur Hanani and Taslin, Puteri Nurfarah Adawiyah and Jefri Din, Mohammad Ikhmal Siddiq and Ibrahim, Muhammad Shazril Idris and Ramli, Muhammad Zahir and Mohamed Zam, Mohd Khairulhazlan and Samion, Mohd Kamarul Huda (2026) Optimising E-Fence porosity for sediment retention: a case study in micro-tidal beaches. In: 13th International Seminar on Ocean and Coastal Engineering, Environmental and Natural Disaster Management (ISOCEEN 2025), 2026, Surabaya, Indonesia.

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Abstract

Micro-tidal sandy beaches are prone to erosion due to limited natural sediment replenishment, and sand fences are commonly used as a sustainable mitigation measure for coastal erosion, promoting sediment deposition. In 2022, Effective Sand Fence (E-Fence) structures with a 6 cm porosity were introduced at Pantai Batu Rakit, Terengganu, to address ongoing shoreline retreat. However, there is no standardised guideline for optimal porosity design, particularly in monsoon-dominated regions. By employing a 1:10 scale physical modelling approach, this study aims to investigate the effect of porosity on sediment retention under controlled wave conditions in a 2D wave flume. Two E-Fence configurations with porosities of 10 cm and 20 cm were tested in a 2-hour simulation using hydrodynamic parameters of 1.5 m wave height, 1.0 s wave period, and 3.02 m water level, which replicate the monthly extreme event. A highresolution 3D Terrestrial Laser Scanner (TOPCON GLS-2000) was used to compare the profile changes between pre- and post-simulation, and sediment volume was analysed via Surfer software and Profiler 3.2 XL. The results showed that the 10 cm porosity trapped more sediment (0.128 m³) than the higher 20 cm configuration (0.105 m³), suggesting that lower porosity enhances trapping efficiency. These findings offer practical insights for optimising sand fence designs by adjusting slat spacing to improve coastal resilience.

Item Type:	Proceeding Paper (Other)
Additional Information:	7828/127649
Subjects:	G Geography. Anthropology. Recreation > GC Oceanography
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Science Kulliyyah of Science > Institute of Oceanography and Maritime Studies
Depositing User:	Dr Muhammad Zahir Ramli
Date Deposited:	27 Feb 2026 16:18
Last Modified:	27 Feb 2026 16:21
Queue Number:	2026-02-Q2332
URI:	http://irep.iium.edu.my/id/eprint/127649

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