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{{float right|[[File:Swale_sections.PNG|frameless|300 px]]}}
{{float right|[[File:Swale_sections.PNG|frameless|450 px]]}}
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>