Parameters

Unit

Data Rang

Mean

Std Dev

a) Range of different input-output parameters used for the estimation of scour depth

Velocity (u)

cm/s

21.8 - 73.6

44.67

12.46

Flow depth (Y)

cm

3.8 - 28

13.43

6.21

Particle mean diameter (d₅₀)

mm

0.48 - 7.6

1.92

1.61

Diameter of the pier (D)

cm

2.34 - 7

4.37

1.44

Equilibrium scour depth (d_s)

cm

0.02 - 11.3

4.75

2.39

b) Range of different non-dimensional input-output parameters used for the estimation of scour depth

dimensionless Shields parameter (τ_*)

0.038 - 0.70

0.23

0.17

normalized flow depth (Y/D)

1.06 - 7

3.14

1.2

pipeline diameter cross section of sediment size (D/d₅₀)

3.28 - 145.8

38.17

31.41

Froude number (Fr)

0.2 - 0.83

0.46

0.15

Non-dimensional equilibrium scour depth (d_s/D)

0.008 - 1.66

1.04

0.32