To address the impact of ship-induced waves on surrounding mangrove wetlands during the operation of the Pinglu Canal project,a novel wave-attenuating floating structure is designed,which combines excellent wave dissipation performance with strong environmental adaptability.To investigate its wave attenuation characteristics,a combined method of three-dimensional numerical simulation using FLOW-3D and in-situ physical model tests is employed.This method quantifies the structure’s effectiveness in attenuating wave height for typical ship waves and explores the influences of water depth,relative submerged depth,and the minimum buffer distance between the structure and mangroves on the wave dissipation effect.The research results indicate that under various relative submerged depths and water depth variations,the novel wave attenuation structure maintains a stable wave height attenuation rate of 55%-75%.The structure consistently achieves a wave height attenuation rate exceeding 55% at various positions relative to the mangrove fringe.Validated by both numerical simulations and physical model experiments,the designed novel wave attenuation structure demonstrates excellent wave dissipation capability and high stability within inland canals.It provides an effective engineering solution for mitigating the erosion of ship-induced waves on the mangrove wetlands along the Pinglu Canal banks,holding significant importance for ensuring the sustainable operation of the canal and the ecological security of its banks.