Changes

[[File:Kortright trench.PNG|thumb|500 px|This infiltration trench features an inlet composed of [[geotextile| filter fabric]] and decorative [[stone| river stone]], which provides some [[pretreatment]] and can easily be removed and replaced as part of routine sediment removal maintenance. For more details click [https://sustainabletechnologies.ca/app/uploads/2016/08/BioVSTrench_TechBrief__July2015.pdf here] ]]  

File:Kortright trench update.png|thumb|600 px|This infiltration trench features an inlet composed of [[geotextile| filter fabric]] and decorative [[stone| river stone]], which provides some [[pretreatment]] and can easily be removed and replaced as part of routine sediment removal maintenance. For more details click [https://sustainabletechnologies.ca/app/uploads/2016/08/BioVSTrench_TechBrief__July2015.pdf here.] <span style="color:red">''A note: The following is an "image map", feel free to explore the image with your cursor and click on highlighted labels that appear to take you to corresponding pages on the Wiki.''</span>

rect 1075 1637 1394 1788 [[OPSS aggregates|Crushed Limestone]]

rect 2206 1708 3336 1944 [[OPSS aggregates|Crushed Limestone]]

 

This article is about underground systems which distribute concentrated flow along a level, linear facility to promote infiltration to native soils. <br>

This article is about underground systems which distribute concentrated flow along a level, linear facility to promote infiltration to native soils. <br>

See [[exfiltration trenches]] for guidance on infiltration trench systems integrated with conventional storm sewers and manholes that provide both infiltration and conveyance functions.  

See [[exfiltration trenches]] for guidance on infiltration trench systems integrated with conventional storm sewers and manholes that provide both infiltration and conveyance functions.  

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==Overview==

==Overview==

[[File:Infiltration Trench.png|thumb|Images and schematic depicting residential infiltration trenches that when installed help reduce the risk of flooding and limit negative impacts to stormwater quality.<ref>The City of Windsor. Stormwater Solutions: Infiltration Trenches. https://www.citywindsor.ca/residents/environment/climate-change-adaptation/climate-resilient-home/Documents/Infiltration%20Trench.pdf. Updated 2021. Accessed 30 August, 2021</ref>]]

[[File:Infiltration Trench.png|450px|thumb|Images and schematic depicting residential infiltration trenches, commonly referred to as [[soakaways]], that when installed help reduce the risk of flooding and limit negative impacts to stormwater quality.<ref>The City of Windsor. Stormwater Solutions: Infiltration Trenches. https://www.citywindsor.ca/residents/environment/climate-change-adaptation/climate-resilient-home/Documents/Infiltration%20Trench.pdf. Updated 2021. Accessed 30 August, 2021</ref>]]

Infiltration trenches are underground, linear, rectangular or trapezoidal excavations with level or gently sloping bottom grade, geotextile filter fabric on sidewalls and top and filled with clean, crushed angular stone or other void-forming structures. They are well suited to sites where available space for infiltration is limited to strips of land between buildings or properties, or along road rights-of-way. They can also be referred to as infiltration galleries.  See [[Perforated Pipe Systems]] fact sheet for guidance on infiltration trench systems integrated with conventional storm sewers that provide both infiltration and conveyance functions.

Infiltration trenches are underground, linear, rectangular or trapezoidal excavations with level or gently sloping bottom grade, geotextile filter fabric on sidewalls and top and filled with clean, crushed angular stone or other void-forming structures. They are well suited to sites where available space for infiltration is limited to strips of land between buildings or properties, or along road rights-of-way. They can also be referred to as infiltration galleries.  See [[Perforated Pipe Systems]] fact sheet for guidance on infiltration trench systems integrated with conventional storm sewers that provide both infiltration and conveyance functions.

{{textbox|1=Infiltration trenches are an ideal technology for:  

{{textbox|1=Infiltration trenches are an ideal technology for:  

===Water Table===

===Water Table===

Maintaining a separation of one (1) metre between the elevations of the base of the practice and the seasonally high water table, or top of bedrock is recommended. Lesser or greater values may be considered based on groundwater mounding analysis. See STEP LID Planning and Design Guide wiki page, [[Groundwater]] for further guidance and spreadsheet tool.

Maintaining a separation of one (1) metre between the elevations of the base of the practice and the seasonally high water table, or top of bedrock is recommended. Lesser or greater values may be considered based on groundwater mounding analysis. See [[Groundwater]] for further guidance and spreadsheet tool.

===Pollution Hot Spot Runoff===

===Pollution Hot Spot Runoff===

Designers should consult local utility design guidance for the horizontal and vertical clearances required between storm drains.

Designers should consult local utility design guidance for the horizontal and vertical clearances required between storm drains.

===Karst===

===[[Karst]]===

Infiltration trenches, chambers and soakaways are not suitable in areas of known or implied karst topography.  

Infiltration trenches, chambers and soakaways are not suitable in areas of known or implied karst topography.

===Setback from Buildings===

===Setback from Buildings===

===Monitoring Wells===  

===Monitoring Wells===  

Recommended for monitoring drainage time between storms.  Monitoring well should be a vertical standpipe consisting of an anchored 100 to 150 mm diameter pipe with perforations along the length within the reservoir, installed to the bottom of the facility, with a lockable cap. Flow-splitting manholes may also be used for drainage time monitoring.

Recommended for monitoring drainage time between storms.  Monitoring wells should be a vertical standpipe consisting of an anchored 100 to 150 mm diameter pipe with perforations along the length within the reservoir, installed to the bottom of the facility, with a lockable cap. Flow-splitting manholes may also be used for drainage time monitoring.

[[File:Monitoring_well.gif]]

[[File:Monitoring_well.gif]]

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==Materials==

==Materials==