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<p>While few field studies of the pollutant removal capacity of bioswales are available from cold climate regions like Ontario, it can be assumed that they would perform similar to [[bioretention cells]]. Bioretention provides effective removal for many pollutants as a result of sedimentation, filtering, plant uptake, soil adsorption, and microbial processes. It is important to note that there is a relationship between the water balance and water quality functions. If a bioswale infiltrates and evaporates 100% of the flow from a site, then there is essentially no pollution leaving the site in surface runoff. Furthermore, treatment of infiltrated runoff will continue to occur as it moves through the native soils. </p>
<p>While few field studies of the pollutant removal capacity of bioswales are available from cold climate regions like Ontario, it can be assumed that they would perform similar to [[bioretention cells]]. Bioretention provides effective removal for many pollutants as a result of sedimentation, filtering, plant uptake, soil adsorption, and microbial processes. It is important to note that there is a relationship between the water balance and water quality functions. If a bioswale infiltrates and evaporates 100% of the flow from a site, then there is essentially no pollution leaving the site in surface runoff. Furthermore, treatment of infiltrated runoff will continue to occur as it moves through the native soils. </p>
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<table table class="table table-condensed table-striped">>
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<table table class="table table-condensed table-striped">
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<tr class=s uccess>
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<tr class=success>
<th class="text-center">Design</th>
<th class="text-center">Design</th>
<th class="text-center">Location</th>
<th class="text-center">Location</th>
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</tr>
</tr>
<tr>
<tr>
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<td colspan=2 class="text-right">Runoff reduction estimate</td>
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<td colspan=2 class="text-right"><strong>Runoff reduction estimate</strong></td>
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<td class="text-center">85%</td>
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<td class="text-center"><strong>85 %</strong></td>
</tr>
</tr>
</table>
</table>