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<p>Equilibrium scour depth and morphological evolution around submerged spur dikes were investigated through a combination of laboratory experiments and numerical modeling. A series of flume experimental runs under clear-water conditions examined the influence of spur dike geometry, submergence ratio, and flow hydraulics on maximum scour depth. A new empirical equation was developed using nonlinear regression analysis, incorporating data from both the present work and Elawady et al. (Proc Hydraul Eng 45:373–378, 2001), showing improved predictive performance over existing models, including Fang et al. (Int J Sediment Res 21(2):89–100, 2006). Numerical simulations using FLOW-3D Hydro captured the flow–sediment interactions and accurately reproduced scour patterns and temporal scour development for varying submergence conditions. The accuracy was observed under all three submergence ratio conditions (SR = 0, 0.5,0.75) with statistical metrics. The findings offer valuable insights into scour mechanisms and provide a reliable framework for estimating the scour around submerged spur dikes, supporting safer and more effective hydraulic structure design. Special attention was given to instrumentation precision, and potential measurement uncertainties were considered in evaluating the reliability of both experimental and numerical outcomes.</p>

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Influence of submergence ratio on scour morphology around spur dike: experimental and numerical analysis

  • 期刊论文

  • 发表日期：

    2025年10月10日

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  • Sai Guguloth,
  • Abhimanyu Roy Chaudhuri,
  • Niloufar Shafighi,
  • Sumit Kumar

摘要

Equilibrium scour depth and morphological evolution around submerged spur dikes were investigated through a combination of laboratory experiments and numerical modeling. A series of flume experimental runs under clear-water conditions examined the influence of spur dike geometry, submergence ratio, and flow hydraulics on maximum scour depth. A new empirical equation was developed using nonlinear regression analysis, incorporating data from both the present work and Elawady et al. (Proc Hydraul Eng 45:373–378, 2001), showing improved predictive performance over existing models, including Fang et al. (Int J Sediment Res 21(2):89–100, 2006). Numerical simulations using FLOW-3D Hydro captured the flow–sediment interactions and accurately reproduced scour patterns and temporal scour development for varying submergence conditions. The accuracy was observed under all three submergence ratio conditions (SR = 0, 0.5,0.75) with statistical metrics. The findings offer valuable insights into scour mechanisms and provide a reliable framework for estimating the scour around submerged spur dikes, supporting safer and more effective hydraulic structure design. Special attention was given to instrumentation precision, and potential measurement uncertainties were considered in evaluating the reliability of both experimental and numerical outcomes.