Meyer-Peter & Müller Transport Formulation

The dimensionless bed-load transport rate F_b is calculated as

(5.29)   

with

(5.30)   

q’ is the Shields parameter related to skin friction and q_c is its critical value. s is the relative density of the bed sediment, g is the acceleration of gravity and d is the grain diameter.

Note that for situations with fine sediment and/or high current speed, this for­mulation may underestimate the actual transport rates, since only the contri­bution from the bed load transport is accounted for. In case of doubt, you could repeat the simulation using another transport theory (e.g. Engelund & Fredsøe Transport Theory or Zyserman & Fredsøe Transport Formulation) in order to assess the importance of the suspended-load transport for the case being analysed.