Calculate the channel conveyance.

conveyance(n, A, R, Cm)

## Arguments

n Manning's roughness coefficient (dimensionless). Flow area [$$L^2$$]. Hydraulic radius [$$L$$]. Unit conversion coefficient for Manning's equation. For SI units, Cm = 1.

## Value

The channel conveyance.

## Details

Channel conveyance is routinely calculated in numerical solutions of steady, gradually-varied and unsteady flows. This function is used extensively by internal procedures and is made accessible to the user for convenience.