Table 5 Function relations between the Froude number (Fr) and gravel coverage degree (Cr) and flow discharge (Q) and slope gradient (J) under different conditions.

From: Effects of Simulated Gravel on Hydraulic Characteristics of Overland Flow Under Varying Flow Discharges, Slope Gradients and Gravel Coverage Degrees

Cr

Equation

R2

NSE

n

 

Cr = 0%

\(Fr=0.978{Q}^{0.362}\,\sin \,{J}^{0.356}\)

0.928

0.928

40

(17)

Cr ≠ 0%

\(\,Fr=1.480{(1-Cr)}^{2.456}{Q}^{0.390}\,\sin \,{J}^{0.664}\)

0.931

0.931

120

(18)

All slopes

\(\,Fr=1.221{(1-Cr)}^{2.936}{Q}^{0.378}\,\sin \,{J}^{0.498}\)

0.931

0.931

160

(19)

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