Table 3
Scour depth prediction equations
| Investigator | Equation |
|---|---|
| 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) |  |
| Investigator | Equation |
|---|---|
| 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) | |