Table 3

Scour depth prediction equations

InvestigatorEquation
Valentin (1967)  , where D90 = particle size for which 90% are finer by the weight
Altinbilek & Basmaci (1973)  , where Fd = V/(ΔgD50)0.5, where V = issuing jet velocity, g = acceleration due to the gravity, Δ = s − 1, s = relative density of the sediment; ϕ = angle of repose
Chatterjee et al. (1994)
Aderibigbe & Rajaratnam (1998)  , where Fd(95) = densimetric Froude number based on D95
Lim & Yu (2002)  , where = factor to account for the effects of an apron downstream from the outlet, which is given by ; σg = geometric standard deviation
Sarkar & Dey (2005)
Dey & Sarkar (2006)
InvestigatorEquation
Valentin (1967)  , where D90 = particle size for which 90% are finer by the weight
Altinbilek & Basmaci (1973)  , where Fd = V/(ΔgD50)0.5, where V = issuing jet velocity, g = acceleration due to the gravity, Δ = s − 1, s = relative density of the sediment; ϕ = angle of repose
Chatterjee et al. (1994)
Aderibigbe & Rajaratnam (1998)  , where Fd(95) = densimetric Froude number based on D95
Lim & Yu (2002)  , where = factor to account for the effects of an apron downstream from the outlet, which is given by ; σg = geometric standard deviation
Sarkar & Dey (2005)
Dey & Sarkar (2006)
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