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{{Clickable button|[[File:TTT.png|300 px|link=http://www.sustainabletechnologies.ca/wp/low-impact-development-treatment-train-tool/]]}}
[[File:LID TTT.png|thumb|[[Vegetated filter strips]] are found within the LID toolbox]]
{| class="wikitable"
{| class="wikitable"
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|width = 210px|Berm height (mm)||This is the height of the curb which constrains the overland sheet flow of water. Where the bottom of the slope discharges directly into another LID facility without impedance, the value is 0.
|width = 210px|Berm height (mm)||This is the height of the curb which constrains the overland sheet flow of water. Where the bottom of the slope discharges directly into another LID facility without impedance, the value is 0.
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|Surface roughness (Manning’s n)||Lower numbers indicate less surface obstruction and result in faster flow. 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>
|Surface roughness (Manning’s n)||Lower numbers indicate less surface obstruction and result in faster flow. See [[Turf]] for ideas of a good number according to mowing practices.
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|Surface slope (%)||If the slope > 3%, consider using level spreaders to reduce erosion of the surface under high flow velocities.
|Surface slope (%)||If the slope > 3%, consider using [[level spreaders]] to reduce erosion of the surface under high flow velocities.
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!colspan = "2" style="background: darkcyan; color: white; align = center"|Soil (native underlying soil, or amended topsoil)
!colspan = "2" style="background: darkcyan; color: white; align = center"|Soil (native underlying soil, or amended topsoil)
|Thickness (mm)||If topsoil has been amended [[Absorbent landscapes]]
|Thickness (mm)||If topsoil has been amended [[Absorbent landscapes]]
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|Porosity (fraction)||Suggest range 0.35 – 0.4, unless otherwise tested
|Porosity (fraction)||Suggest around 0.4, unless otherwise tested.
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|Field capacity (fraction)||Rowspan=5|Will vary according to native or amended topsoil<ref name = SWMM/>
|Field capacity (fraction)||Rowspan=5|Will vary according to native or amended topsoil<ref> 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>
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|Wilting point (fraction)||Will vary according to native or amended topsoil<ref name = SWMM/>
|Wilting point (fraction)
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|Conductivity (mm/hr)||Will vary according to native or amended topsoil<ref name = SWMM/>
|Conductivity (mm/hr)
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|Conductivity slope||Will vary according to native or amended topsoil<ref name = SWMM/>
|Conductivity slope
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|Suction head (mm)||Will vary according to native or amended topsoil<ref name = SWMM/>
|Suction head (mm)
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|Design drawdown time (hrs)||?
|Design drawdown time (hrs)||Will be determined by regulatory authority, often 48 - 72 hours to reduce nuisance from [[Wildlife#Mosquitoes|mosquitoes]]
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[[category:modeling]]
[[category:modeling]]