Swales: TTT

Name	User-assigned swale name
Upstream Node	Name of node on the inlet end of the swale (which is normally the end at higher elevation)
Downstream Node	Name of node on the outlet end of the swale (which is normally the end at lower elevation)
Length (m)	Length of the swale
Manning's Roughness	Manning's roughness coefficient
Upstream Invert Offset (m)	Depth of swale invert above node invert at inlet end of the swale
Downstream Invert Offset (m)	Depth or elevation of the swale invert above the node invert at the outlet end of the swale
Depth (m)	Depth of the swale
Bottom Width (m)	Bottom width of the trapezoidal swale (i.e., open channel) For a triangular channel, enter 0
Left Side Slope (m/m)	Left side slope (run/rise)
Right Side Slope (m/m)	Right side slope (run/rise)
Seepage (mm/hour)	Rate of seepage loss into the surrounding soil

A shallow constructed channel, often grass-lined, which is used as an alternative to curb and channel, or as a pretreatment to other measures. Swales are generally characterized by a broad top width to depth ratio and gentle grades.