Mannings formula is an equation used to calculate waters rate of flow -- in cubic feet per second -- in an open channel such as a ditch or flood control channel. Where n is the coefficient of roughness in the GanguilletKutter formula. Calculate Mannings Roughness Coefficient Calculate Flow Velocity Calculate Hydraulic Radius Calculate Line Slope.
Mannings formula is an equation used to calculate waters rate of flow -- in cubic feet per second -- in an open channel such as a ditch or flood control channel.
V1486R 23 S 12n. According to him Manning was the name of a town in Saxony and from it the surname sprang. When Mannings C is used in the Chezy formula the Manning equation for flow velocity in an open channel results. This form of the equation is for SI units.