Author(s): Mirajul Hossain; Xihang Xu; Deborah Villarroel-Lamb; Md Salauddin
Linked Author(s): Md Salauddin
Keywords: No Keywords
Abstract: Artificial porous reefs are widely used for coastal protection; nevertheless, an explicit quantitative design criterion that correlates reef geometries, such as porosity, with wave attenuation efficacy remains absent. This study aims to investigate the correlation between the porosity of submerged reefs and their ability to attenuate waves, with particular focus on the wave transmission coefficient and the reduction of wave energy. In this context, physical modelling of artificial reefs in a wave flume was performed to investigate the effect of reef porosity on wave attenuation, energy dissipation, and overall hydraulic performance for coastal protection structures. Artificial reefs having porosity levels from 0.0 to 0.45 under various wave conditions revealed a notable wave heights and wave energy reduction and demonstrated that the increase of porosity reduces the attenuation potentiality. The findings provide quantitative guidance for optimising porous reef geometries, supporting performance-based coastal management and more reliable nature-based solutions.
Year: 2026