Abstract
Spur dikes are vital structures are used to control erosion and manage flow dynamics. This study evaluates the effectiveness of multiple spur dikes in reducing scour depth around the first dike by adjusting their spacing and length. Numerical simulations were performed using the FLOW-3D-hydro model, incorporating the RNG k-ϵ turbulence model to account for low-intensity flow conditions. Results showed that parallel spur dikes significantly influenced flow direction, reducing scour depth near the first dike. Optimal configurations, with spacing set at twice the length of the dike, reduced scour depth by up to 30%. The numerical model used a nested mesh configuration for precise flow capture. A comparison of experimental and numerical results showed a strong correlation, with an R² of 0.94, RMSE of 0.03, and P-bias of 2.5%. These findings confirm the accuracy of the FLOW-3D model in simulating scour dynamics, offering key insights for hydraulic engineering applications.
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