Table 1 Overview of the test conditions and parameter ranges

Discharge Q (Ls⁻¹)

32, 34, 36, 38, 40

Angle of flow jet from wall θ (°)

150, 120, 90, without jet

Sluice gate opening G (cm)

6, 6.5,7

Froude number upstream of the jump F_r1

2.31–3.71

Froude number downstream of the jump F_r2

0.31–0.41

Flow depth upstream the sluice gate H (cm)

26.6–37.07

Jet velocity to velocity upstream the jump V_j/V₁

0.49–0.71, without jet

Flow depth upstream of the jump y₁ (cm)

4.2–4.9

Flow depth downstream of the jump y₂ (cm)

17.07–19.54

Maximum scour depth D_s (cm)

5–7.2

Length of scour L_s (cm)

65–113.5

Volume of scour V_s (cm³)

13,331–38,088