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Line 1: − Many of the dimensions in a bioretention system are relatively constrained by the performance requirements of the individual component. There is greatest flexibility in the ponding depth and the depth of the storage reservoir beneath the optional underdrain pipe. The order of operations in calculating these dimensions depends on whether an underdrain is desired. + − + − + − |-+ − ! Component+ − ! Void ratio+ − ! Recommended depth (with underdrain pipe)+ − ! Recommended depth (no underdrain pipe) + − |-+ − | Ponding depth+ − | 1 − | 300 mm − − |- − | [[Mulch]] − | − * 0.7 for wood based − * 0.4 for aggregates − | colspan="2" |75 ± 25 mm − |- − | [[Biofiler media]] − | 0.3 typical − − * 300 mm to support turf grass and accept only roof runoff − * 600 mm to support flowering [[perennials]] and decorative [[grasses]] − * 1000 mm to support [[trees]] − |- − | [[choker gravel|Choker course]] − | 0.4 typical − − |- − | Embedding reservoir − | 0.4 − | Is equal to underdrain pipe diameter − | Not applicable − |- − | Storage reservoir − | 0.4 − | See below − | See below − − − − − # Determine what the planting needs are and assign appropriate depth of media. − # Determine what the pipe diameter needs to be and assign appropriate depth of reservoir. − # Determine maximum possible storage reservoir depth (''d<sub>S</sub>''): − <math>d_{S}=f'\times38.4</math> − {{Plainlist|1=Where: − *''f''' = Design infiltration rate in mm/hr, and − *38.4 comes from multiplying desired drainage time of 96 hours by void ratio of 0.4}} − − ==Sizing without an underdrain pipe== − # Determine what the planting needs are and assign appropriate depth of media. − # Determine what the pipe diameter needs to be and assign appropriate depth of reservoir. − # Determine maximum possible storage reservoir depth (''d<sub>S</sub>''): − <math>d_{S}=f'\times38.4</math> − {{Plainlist|1=Where: − *''f''' = Design infiltration rate in mm/hr, and − *38.4 comes from multiplying desired drainage time of 96 hours by void ratio of 0.4}} − ''Then'' − # Determine maximum permissible ponding depth (''d<sub>P</sub>''): − <math>d_{P}=f'\times19.2</math> − {{Plainlist|1=Where: − *''f''' = Design infiltration rate in mm/hr, and − *19.2 comes from multiplying desired drainage time of 48 hours by void ratio of 0.4. Note that conceptually the drainage of the ponded area is limited by ex-filtration at the base of the practice.}} − + + + + + + + + + + + Line 77:
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Line 43: − − == Wishlist == − *Extension:Scribunto − :To enable the use of: − **Module:Clade − **Module:Weather box − *Mobile FrontEnd − + − + − + − + − + + + + + + − + Line 131:
Line 78: − <div class='tableauPlaceholder' id='viz1508348769899' style='position: relative'><noscript><a href='https://wiki.sustainabletechnologies.ca/index.php/Drawdown_time'><img alt='Dashboard 1 ' src='https://public.tableau.com/static/images/St/StormIntereventTimesOntario/Dashboard1/1_rss.png' style='border: none' /></a></noscript><object class='tableauViz' style='display:none;'><param name='host_url' value='https%3A%2F%2Fpublic.tableau.com%2F' /> <param name='embed_code_version' value='2' /> <param name='site_root' value='' /><param name='name' value='StormIntereventTimesOntario/Dashboard1' /><param name='tabs' value='no' /><param name='toolbar' value='yes' /><param name='static_image' value='https://public.tableau.com/static/images/St/StormIntereventTimesOntario/Dashboard1/1.png' /> <param name='animate_transition' value='yes' /><param name='display_static_image' value='yes' /><param name='display_spinner' value='yes' /><param name='display_overlay' value='yes' /><param name='display_count' value='yes' /><param name='filter' value='publish=yes' /></object></div> <script type='text/javascript'> var divElement = document.getElementById('viz1508348769899'); var vizElement = divElement.getElementsByTagName('object')[0]; vizElement.style.minWidth='420px';vizElement.style.maxWidth='650px';vizElement.style.width='100%';vizElement.style.minHeight='620px';vizElement.style.maxHeight='920px';vizElement.style.height=(divElement.offsetWidth*0.75)+'px'; var scriptElement = document.createElement('script'); scriptElement.src = 'https://public.tableau.com/javascripts/api/viz_v1.js'; vizElement.parentNode.insertBefore(scriptElement, vizElement); </script>+ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +
→.
{{Widget
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{| class="wikitable"
|author=Michael Platzer
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This widget allows you to embed [http://www.flickr.com/search/?q=flowers&w=all Flickr Search Queries] to your wiki page.
| See below
| colspan="2" |
| colspan="2" |100 mm
|}
==Determine maximum overall depth==
To insert this widget, use the following code:
<nowiki>{{#widget:</nowiki>{{PAGENAME}}<nowiki>
|query=flowers
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== Sample result ==
{{#widget:{{PAGENAME}}
|query=flowers}}
{{Comments}}
----
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==Stuff I've done==
==Stuff I've done==
*Restrict account creation
Flow (''Q'') in an open channel, such as a swale, may be calculated using Manning's equation:
*pdf Handler
<math>Q=VA=\frac{R^{\frac{2}{3}}S^{\frac{1}{2}}}{n}</math>
*Multimedia viewer
Where:
*YouTube
<math>R=\frac{A}{P}</math>
*Google analytics
{{Plainlist|1=Where:
*''Q'' = the flow in the swale (m<sup>3</sup>/s)
*''A'' = the cross sectional area of the swale (m<sup>2</sup>)
*''P'' = the wetted perimeter of the swale (m)
*''S'' = the longitudinal slope (m/m)
*''n'' = Manning's coefficient (dimensionless)}}
==Test stuff==
==Test stuff==
<gallery mode=Slideshow>
<gallery mode="packed-overlay">
Swale TTT.png|Textey text
Swale TTT.png|Textey text
LID TTT.png|Captiony caption
LID TTT.png|Captiony caption
{| class="wikitable"
!Permeability
|D<sub>15</sub> Base/D<sub>15</sub> Bedding layer > 5
|-
!Choke
|D<sub>50</sub> Base/D<sub>50</sub> Bedding layer > 25
|-
!Choke
|D<sub>15</sub> Base/D<sub>85</sub> Bedding layer > 5
|}
==.==
{| class="wikitable"
|
!Surface filter
!Underground filter
!Perimeter filter
!Pocket filter
!Organic filter
!Bioretention
|-
!Ultra-urban
|Maybe||Ideal||Yes||Maybe||Maybe||Maybe
|-
!Parking lots
|Ideal||Yes||Ideal||Yes||Yes||Ideal
|-
!Roads
|Maybe||Maybe||Maybe||Maybe||No||Yes
|-
!Residential
|Maybe||Maybe||Maybe||Yes||Maybe||Yes
|-
!Landscaped
|No||No||No||No||Maybe||Ideal
|-
!Rooftop
|Yes||Yes||Yes||Yes||Yes||Yes
|}