The suspended-load adaptation coefficientαsmay be related to the near-bed sediment concentrationcbbycb = αsCswhereCsis the depth-averaged suspended sediment concentration. Since it is not reasonable for the near-bed concentration to be larger than the bed concentration, it follows that the adapatation coefficient should be limited as
1)
\hat{α}_{sk} = \min (α_{sk},ρ_{dk}/C_{sk})
where
ρ_{dk}= user-sepcified dry bulk density [M/L3]
C_{sk}= suspended sediment mass concentration [M/L3]