In many tidal flat regions like the Yangtze River Delta, vegetation naturally grows alongside dikes and offers wave dissipation benefits. Studies by Suzuki et al. (2019) have shown that vegetated foreshores effectively dissipate waves. They also reduce flow velocities, leading to sediment accumulation, as observed in research by Chen et al. (2012) and Hu et al. (2018). Despite this potential, limited research has explored the influence of vegetation on wave overtopping across coastal dikes. This research employs laboratory experiments within the wave flume facility at Dalian University of Technology in China to investigate how vegetation impacts wave overtopping. The study examines factors like vegetation density, width, and relative height on wave overtopping for both vertical walls and sloping dikes, and establishes relationships between vegetation configurations, wave conditions, and overtopping discharges.
