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Line 16: − Exfiltration trenches are similar to [[infiltration trenches]] but differ primarily in the the manner in which stormwater is delivered to the trench.<br>+ − Runoff enters infiltration trenches directly by infiltration from the surface. In exfiltration systems, surface runoff is collected by drainage [[inlets]] and delivered to the trench via subsurface perforated [[pipes]]. − {{TOClimit|2}} − ==Overview==
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Exfiltration trenches are similar to [[infiltration trenches]] but differ primarily in the the manner in which stormwater is delivered to the trench.<br>
Runoff enters infiltration trenches directly by infiltration from the surface. In exfiltration systems, surface runoff is collected by drainage [[inlets]] and delivered to the trench via subsurface perforated [[pipes]].
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==Overview==
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File:Exfitlration .gif|500 px|Typical flow pathway through one section of the Etobicoke Exfiltration system (see performance report for further details) For more details click [https://sustainabletechnologies.ca/app/uploads/2013/03/Exfil_ES.pdf here.]
File:Exfitlration .gif|thumb|600px|Typical flow pathway through one section of the Etobicoke Exfiltration system (see performance report for further details) For more details click [https://sustainabletechnologies.ca/app/uploads/2013/03/Exfil_ES.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 195 134 260 179 [[Exfiltration: Gallery|Manhole]]
rect 195 134 260 179 [[Exfiltration: Gallery|Manhole]]
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Exfiltration systems can be thought of as infiltration trenches that are integrated with conventional stormwater conveyance systems (i.e. catch basins, solid pipes and maintenance holes), designed for both conveyance and [[infiltration]] of excess stormwater.
Exfiltration systems can be thought of as infiltration trenches that are integrated with conventional stormwater conveyance systems (i.e. catch basins, solid pipes and maintenance holes), designed for both conveyance and [[infiltration]] of excess stormwater.
By attenuating runoff volume, they reduce contaminant loads delivered to downstream BMPs, end-of-pipe facilities or receiving waterbodies.
By attenuating runoff volume, they reduce contaminant loads delivered to downstream BMPs, end-of-pipe facilities or receiving waterbodies.