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{{Clickable button|[[File:TTT.png|400 px|link=http://www.sustainabletechnologies.ca/wp/low-impact-development-treatment-train-tool/]]}}
{{Clickable button|[[File:TTT.png|400 px|link=http://www.sustainabletechnologies.ca/wp/low-impact-development-treatment-train-tool/]]}}
[[File:Swale TTT.png|thumb|Swale element in TTT menu]]
[[File:Swale TTT.png|thumb|Swale element in TTT menu]]
[[Outfall TTT.png|thumb|Outfall element in the TTT menu]]
[[File:Weir TTT.png|thumb|Weir elements may be incorporated as checkdams]]
[[File:Weir TTT.png|thumb|Weir elements may be incorporated as checkdams]]
For detailed scenarios of enhanced swales, the weir element can be incorporated for checkdams.
For detailed scenarios of enhanced swales, the weir element can be incorporated for checkdams.
The alternative is to use the 'enhanced swale' within the LID toolbox, but this incorporates fewer design parameters.
The alternative is to use the 'enhanced swale' within the LID toolbox, but this incorporates fewer design parameters.
A 'swale' has to connect two existing elements within the TTT. Where another element isn't specified an 'outfall' can be used.
{| class="wikitable"
{| class="wikitable"
|+Parameters for 'Swale' elements in the TTT
|+A 'swale' as a conveyance element in the TTT (key parameters)
|-
|-
|Upstream Node||Name of node on the inlet end of the swale (which is normally the end at higher elevation)
|Upstream Node||Name of node on the inlet end of the swale (higher elevation)
|-
|-
|Downstream Node||Name of node on the outlet end of the swale (which is normally the end at lower elevation)
|Downstream Node||Name of node on the outlet end of the swale (lower elevation)
|-
|-
|Length (m)||Length of the swale
|Length (m)||Length of the swale
|-
|-
|Manning's Roughness||Manning's roughness coefficient
|Manning's Roughness||Lower numbers indicate less surface obstruction and result in faster flow. <br>
Suggested range for mown grass (dependent on density) 0.03 – 0.06 <ref name = SWMM> Oregon State Univ., Corvallis. Dept. of Civil, Construction and Environmental Engineering.; Environmental Protection Agency, Cincinnati ONRMRL. Storm Water Management Model Reference Manual Volume I Hydrology (Revised). 2016:233.https://nepis.epa.gov/Exe/ZyPURL.cgi?Dockey=P100NYRA.txt Accessed August 23, 2017.</ref>
|-
|-
|Upstream Invert Offset (m)||Depth of swale invert above node invert at inlet end of the swale
|Upstream Invert Offset (m)||Depth of swale invert above node invert at inlet end of the swale
|Bottom Width (m)||Bottom width of the trapezoidal swale (i.e., open channel)<br> For a triangular channel, enter 0
|Bottom Width (m)||Bottom width of the trapezoidal swale (i.e., open channel)<br> For a triangular channel, enter 0
|-
|-
|Left Side Slope (m/m)||Left side slope (run/rise)
|Left Side Slope (m/m)||Left side slope (run/rise). Suggested value of 3 or 4 if design permits. [[Enhanced swales]]
|-
|-
|Right Side Slope (m/m)||Right side slope (run/rise)
|Right Side Slope (m/m)||Right side slope (run/rise). Suggested value of 3 or 4 if design permits.
|-
|-
|Seepage (mm/hour)||Rate of seepage loss into the surrounding soil
|Seepage (mm/hour)||Infiltration rate of native (or amended) soil
|}
|}