Calculation of bridge scour using the FWHA HEC-18 formula, Victor Miguel Ponce, Rosa D. Aguilar, San Diego State University

    online_scour_hec18: Calculation of bridge scour using the HEC-18 formula

Formula:

Fr₁ = v₁/(g y₁)^1/2
y_s /y₁ = 2 K₁ K₂ K₃ (a / y₁)^0.65 Fr₁^0.43

[ SI Units (metric): y_s, y₁, a, and L in m ]
[ U.S. Customary Units: y_s, y₁, a, and L in ft ]
[ Fr = Froude number; g = gravitational acceleration ]

Reference:
Evaluating Scour at Bridges,
FHWA Hydraulic Engineering Circular No. 18,
Fifth Edition, 2012.

INPUT DATA:      [Description]     [Sample Input]

Select:

Flow depth y₁ :

Flow velocity v₁ :

Pier width a :

Pier length L :

Angle of attack θ of the flow (degrees):

Pier nose shape:

Bed condition:

OUTPUT:
System of units: SI units (metric)

Pier nose shape: Square nose

Bed condition: Clear-water scour

♦ Scour depth y_s :

Press button to

or recalculate

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