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*Minimum residence time of 5 minutes.
*Minimum residence time of 5 minutes.
*Maximum flow velocity 0.3 m/s
*Maximum flow velocity 0.3 m/s
*Bottom width between 0.6 - 2.4 m
*Bottom width between 0.75 - 3.0 m
*Minimum length 30 m
*Minimum length 30 m
*Minimum length between checkdams <u>></u> 5m
*Maximum depth of flow should be 50% height of grass for regularly mown swales, to maximum of 75 mm, or 33% height of vegetation for infrequently mown swales.
*Maximum depth of flow should be 50% height of grass for regularly mown swales, to maximum of 75 mm, or 33% height of vegetation for infrequently mown swales.