Calculation of pier scour using the Froehlich (1988) design formula, Bavya Vuppalapati, San Diego State University

       online_scour_froehlich1988: Calculation of pier scour using the Froehlich (1988) formula

Formula:

Fr₁ = v₁/(g y₁)^1/2
y_s = 0.32 b φ Fr₁^0.2 (b_e / b)^0.62 (y₀ / b)^0.6 (b / D₅₀)^0.08 + b

[ SI Units (metric): y_s, y₀, b and b_e in m ]
[ U.S. Customary Units: y_s, y₀, b and b_e in ft ]
[ Fr = Froude number; g = gravitational acceleration ]

Reference

INPUT DATA:      [Description]     [Sample Input]

Select:

Flow depth y₁ :

Flow velocity v₁ :

Pier width b :

Angle of attack θ of the flow (degrees):

Median diameter of bed material D₅₀ :

Pier nose shape:

OUTPUT:
System of units: SI units (metric)

Pier nose shape: Square nose

♦ Scour depth y_s :

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or recalculate

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