Numerical and Experimental Investigation of the Impact of Beach Deformation on Wind-Blown Sand

Abstract This study investigates the effects of beach deformation on wind-blown sand transport through physical model experiments and numerical simulations. The experiments were conducted using a 34-m-long open channel, focusing on three scenarios: flat surfaces (Experiment A), sloped surfaces (Experiment B), and sloped surfaces with wave action (Experiment C). A piston-type wave paddle and a blower were used to simulate wind and wave conditions. Wind-blown sand transport rates were measured, and each scenario's experimental coefficients for Kawamura's equation were calculated. The results showed a gradual increase in $$K$$ K values, with 0.482 for Experiment A, 0.538 for Experiment B, and 0.617 for Experiment C, highlighting the influence of slope and wave action. Numerical simulations were performed using the CADMAS-STR-STM model, which integrates fluid, structure, and sediment transport. The simulation results were consistent with experimental data, demonstrating the increasing trend of wind-blown sand transport due to wave effects.