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Infiltration trenches

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This article is about underground systems which distribute concentrated flow along a level, linear facility to promote infiltration to native soils. <br>
For a similar structure, which differs in being designed to receive excess flow and convey it, whilst promoting infiltration to native soils, see [[exfiltration trenches]]. [[File:Kortright trench.PNG|thumb|The infiltration trench at Kortright is topped with [[filter fabric]] and decorative [[stone]], both of which provide some [[pretreatment]] and can easily be removed and replaced as an occasional maintenance task. For more details click [https://sustainabletechnologies.ca/app/uploads/2016/08/BioVSTrench_TechBrief__July2015.pdf here] ]] <div class="col-md-8">
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===Overview=={{float right|{{#widget:YouTube|id=DLXsb1FwKD4}}}}<p>As their name suggests infiltration trenches work primarily to infiltrate and convey stormwater. They are an underground facility and are excellently suited to connecting other components in the treatment train.</p>{{TextBoxtextbox|1=Infiltration trenches are an ideal technology for:
*Installing below any type of surface or landscape
*Balancing the requirements to infiltrate excess stormwater whilst conveying excess}}
<p><strong>'''The fundamental components of an infiltration trench are:</strong> ''' *Layers of [[Reservoir_gravel|coarse aggregate]] to bed the chambers pipe, store and redistribute water.
*[[Pipes|Perforated pipe]]
*[[Geotextiles|Filter fabric Geotextile]] ==Planning considerations==As shown in the illustration above a surface inlet to an infiltration trench may simply be a channel of decorative [[stone]] supported by a[[geotextile]].kSo that at grade it may be indistinguishable from a [[gravel diaphragm]].a geotextileIn function though, the decorative surface course of the infiltration trench needs to remain free-draining down into the trench, whereas the gravel diaphragm is designed to spill over onto adjacent land, leaving sediment behind in the [[gravel]] or [[stone]]channel. </p></div>==Design==<div class="col-md-4"><panelWarning><gallery mode="packed" widths=300px heightsSizing===300px>'''[[Infiltration trench: Sizing and modeling]]'''*Virginia up to 10' (3 m) deep. <ref>Viriginia Department of Transport. (2010).png| Schematic diagram VDOT BMP Design Manual of an underground infiltration trenchPractice. Retrieved March 15, 2018, from http://www.virginiadot.org/business/resources/LocDes/BMP_Design-Manual/Chapter_8_Infiltration_Trench.pdf</galleryref>*Minnesota up to 12' (3.6 m) deep. <ref>Design criteria for Infiltration trench. (2016, September 21). Minnesota Stormwater Manual, . Retrieved 13:25, April 4, 2018 from https:/panelWarning>/stormwater.pca.state.mn.us/index.php?title=Design_criteria_for_Infiltration_trench&oldid=28702.</divref><div class=*"col-md-12...not normally be deeper than 3 to 4 m in order to maximise the length of the flow path to the water table through the unsaturated zone."<ref>-Design of soakaways (2015) www.tiipublications.ie/library/DN-DNG-03072-01.pdf</ref>*There is a cost implication with digging deeper practices, trench boxes may be required to retain the side walls during construction. ==Materials=====DesignAggregate===<h4>Sizing</h4>{{:Infiltration: Sizing and modelingReservoir aggregate}}----===MaterialsPerforated Pipe==={{:GravelPipes}}
*[[Geotextiles]]
 
==Construction==
*[[Construction]]
 
==Gallery==
{{:Infiltration trenches: Gallery}}
 
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===Construction===
{{:Infiltration: Construction}}
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===Incentives and Credits===
<h4>In Ontario</h4>
<h4>LEED BD + C v. 4</h4>
{{:LEED: Rainwater management}}
<h4>SITES v.2 </h4>
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{{:Feedback}}
[[category:infiltration]]

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