In order to close the system of equations describing the sediment transport, bed change, and bed sorting equations, the fractional depth-averaged total-load concentration potential (Ctk*) must be estimated from an empirical formula. The depth-averaged concentration potential is defined as
1)
C_{tk}^{*}=\frac{q_{tk}^{*}}{Uh}
whereqtk*is the total-load transport potential for thekthsediment size class.
HEC-RAS 2D Sediment supports the following Transport Potential Formulas: