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Table 3

Values of A, B, and C for different roughness condition and ranges of hc/d50

Roughness conditionhc/d50ABC
Large scale roughness hc/d50 < 2.5 0.33 −1.3 −14.5 
Intermediate scale roughness 2.5 < hc/d50 < 6.6 0.25 −1.2 −12.0 
Small scale roughness 6.6 < hc/d50 < 42 0.15 −1.0 −11.5 
smooth ramp hc/d50 > 42 0.02 −0.9 −25.0 
Roughness conditionhc/d50ABC
Large scale roughness hc/d50 < 2.5 0.33 −1.3 −14.5 
Intermediate scale roughness 2.5 < hc/d50 < 6.6 0.25 −1.2 −12.0 
Small scale roughness 6.6 < hc/d50 < 42 0.15 −1.0 −11.5 
smooth ramp hc/d50 > 42 0.02 −0.9 −25.0 
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