Changes

[[File:Bioswale.png||thumb|Bioswale with check dams<br> (vertical scale exaggerated)]]

[[File:Bioswale.png||thumb|Bioswale with check dams<br> (vertical scale exaggerated)]]

[[File:Stepped cells.png||thumb|Stepped bioretention cells alternative for slopes >6 % <br> (vertical scale exaggerated)]]

[[File:Stepped cells.png||thumb|Stepped bioretention cells alternative for slopes >6 % <br> (vertical scale exaggerated)]]

A linear design (surface area typically >2:1 length:width) is a common feature of a swales:

A linear design (surface area typically >2:1 length:width) is a common feature of swales:

*An absolute minimum width of 0.6 m is required for bioswales to promote healthy plant growth, and to facilitate construction,

*An absolute minimum width of 0.6 m is required for bioswales to promote healthy plant growth, and to facilitate construction,

*Grassed swales are usually mown as part of routine maintenance, so the cross section will be triangular or trapzoidal in shape with maximum side slopes of 1:3. The minimum width for this type would be 2 m. See [[Enhanced grass swales#Best cross sections| Best cross sections]]

*Grassed swales are usually mown as part of routine maintenance, so the cross section will be triangular or trapezoidal in shape with maximum side slopes of 1:3. The minimum width for this type would be 2 m. See [[Enhanced grass swales#Best cross sections| Best cross sections]]

Swales may be graded along longitudinal slopes between 0.5 - 6 %:

Swales may be graded along longitudinal slopes between 0.5 - 6 %: