online_scour_froehlich (1988):  Calculation of pier scour using Froehlich (1988) equation   

Fr1 = v1/(g y1)1/2

ys = 0.32 b φ Fr10.2 (be / b)0.62 (y0 / b)0.6 (b / D50)0.08 + b


Reference


SAMPLE INPUT      [Main page]     [Description]

  • Flow depth directly upstream of the pier y1 =  1.0 m

  • Mean flow velocity directly upstream of the pier v1 =  1.0 m/s

  • Pier width in a horizontal direction normal to the flow b =  1.0 m

  • Angle of attack of the flow θ =  0 degrees

  • Median diameter of the bed material D50 =  1.0 mm

  • Pier nose shape D50 :  Round nose

SAMPLE OUTPUT     

         Scour depth ys =  1.4425 m


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