Line 1: |
Line 1: |
| {{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]] |
|
| |
|
Line 6: |
Line 7: |
| 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) |
| |-
| |
| |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) | | |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 |
Line 28: |
Line 30: |
| |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 |
| |} | | |} |
|
| |
|