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Numerical Modeling of Local Scour Around Spur Dikes

Author(s): J. Peng; N. Tamai; Y. Kawahara; G. W. Huang

Linked Author(s): Yoshihisa Kawahara, Peng Jin, Nobuyuki Tamai

Keywords: Numerical model; Local scour; Scour depth; Spur dike; Bed load transport

Abstract: Local scour and deposition around submerged spur dike was numerically simulated in the present paper. A sediment transport model of bed load that interacts with 3D turbulent flow was developed. Computation of the bed load transport took into account the influence of bed slope on both critical bed shear stress and bed load transport rate. The predicted scour hole profiles agreed reasonably well with a measurement. The developed model was applied to a spur dike flow over movable bed. The results clarified transient characteristics of local scour with time and the bed topography at equilibrium state.


Year: 1999

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