Changes

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Flow (''Q'') in an open channel, such as a [[swale]], may be calculated using Manning's equation:

Flow (''Q'') in an open channel, such as a [[swale]], may be calculated using Manning's equation:

<math>Q=VA=\frac{R^{\frac{2}{3}}S^{\frac{1}{2}}}{n}</math>

<math>Q=VA=\frac{R^{\frac{2}{3}}S^{\frac{1}{2}}}{n}</math>

*''P'' = the wetted perimeter of the swale (m)

*''P'' = the wetted perimeter of the swale (m)

*''S'' = the longitudinal slope (m/m)

*''S'' = the longitudinal slope (m/m)

*''n'' = [[Manning's coefficient]] (dimensionless)}}

*''n'' = [[Manning's coefficient]] or 'Manning's n' (dimensionless)}}

 

 

{{:Manning's n}}