Roughness Value in Hydraulics and Waterworks Formulas

Roughness Value is the arithmetic average of the absolute values of the roughness profile ordinates. And is denoted by R_a. Roughness Value is usually measured using the Millimeter for Length. Note that the value of Roughness Value is always positive.

Formulas to find Roughness Value in Hydraulics and Waterworks

fxStrickler Formula for Average Height of Roughness ProtrusionsGo

fxAverage Height of Roughness Protrusions given Mean Velocity of flow in Rough ChannelsGo

Hydraulics and Waterworks formulas that make use of Roughness Value

fxManning's Coefficient using Strickler FormulaGo

fxMean Velocity of flow in Rough ChannelsGo

fxHydraulic Radius given Mean Velocity of flow in Rough ChannelsGo

fxChezy Constant for Rough ChannelsGo

fxHydraulic Radius given Chezy Constant for Rough ChannelsGo

List of variables in Hydraulics and Waterworks formulas

fx Manning’s Roughness Coefficient Go

fx Hydraulic Radius of Channel Go

fx Average Velocity of Turbulent flow Go

fx Shear Velocity Go

FAQ

What is the Roughness Value?

Roughness Value is the arithmetic average of the absolute values of the roughness profile ordinates. Roughness Value is usually measured using the Millimeter for Length. Note that the value of Roughness Value is always positive.

Can the Roughness Value be negative?

No, the Roughness Value, measured in Length cannot be negative.

What unit is used to measure Roughness Value?

Roughness Value is usually measured using the Millimeter[mm] for Length. Meter[mm], Kilometer[mm], Decimeter[mm] are the few other units in which Roughness Value can be measured.

Let Others Know

✖

Facebook

Twitter

Copied!