Factor C3 for partially buried pipes

Symbol
$C_{g3}$
Formulae
$\frac{2C_{g1}}{\beta_b \left(\pi-\beta_b\right) \sqrt{{C_{g2}}^2-1}}$Morud & Simonsen $C_{g2}$ > 1
$\frac{1C_{g1}}{\beta_b \left(\pi-\beta_b\right) \sqrt{{C_{g2}}^2-1}}$Morud & Simonsen $C_{g2}$ ≤ 1