Abstract
Gravel beaches are widespread throughout the world. Over the past decades, researchers in coastal morphodynamics have focused on studying sand beaches. However, gravel beach morphodynamics are still worthy of investigation as gravel material has many practical uses, for example, to nourish eroding sand beaches. This study aims to advance the understanding of the behavior of gravel beaches under wave attack. Physical modelling has been used to investigate the transformation of gravel beaches under normally-incident random and regular waves, for two initial beach slopes. The measurements have been analysed to investigate morphological evolution, wave reflection, and energy dissipation. Wave height, wave period, wave duration, and initial beach slope were all found to influence beach deformation as well as the wave reflection characteristics. The gravel beaches were found to be effective in wave energy dissipation.
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