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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. <div class="col-md-8"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 [ here] ]] {{TOClimit|2}}==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 areas of 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"><panelSuccess><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</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:/panelSuccess>/</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)</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}}
{{:Infiltration trenches: Gallery}}
{{:Infiltration: Construction}}
===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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