Table 2 Function relations between the average velocity (u) 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%

u = 0.076Q0.551 sin J0.240

0.981

0.981

40

(8)

Cr ≠ 0%

\(\,u=0.082{(1-Cr)}^{1.165}{Q}^{0.588}\,\sin \,{J}^{0.406}\)

0.966

0.966

120

(9)

All slopes

\(u=0.083{(1-Cr)}^{1.539}{Q}^{0.574}\,\sin \,{J}^{0.340}\)

0.962

0.962

160

(10)

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