Difference between revisions of "Bioswales: Performance"

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m (Jenny Hill moved page Bioswales: Water quality to Bioswales: Performance: Generalization)
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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>
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]].
<div class="col-md-8">
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.
<table table class="table table-condensed table-striped">
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>
    <tr class=success>
 
        <th class="text-center">Design</th>
{| class="orangetable"
        <th class="text-center">Location</th>
|-
        <th class="text-center">Runoff reduction</th>
!Design
    </tr>
!Location
    <tr>
!Runoff reduction
        <td class="text-center">No underdrain</td>
|-
        <td class="text-center">Washington</td>
|No underdrain||Washington||>98 %
        <td class="text-center">98 %</td>
|-
    </tr>
|No underdrain||United Kingdom||>94 %
    <tr>
|-
        <td class="text-center">No underdrain</td>
|With underdrain||Maryland||46 - 54 %
        <td class="text-center">United Kingdom</td>
|-
        <td class="text-center">94 %</td>
|colspan=2 <strong>Runoff reduction estimate</strong>||<strong>85 %</strong>
    </tr>
|}
    <tr>
        <td class="text-center">With underdrain</td>
        <td class="text-center">Maryland</td>
        <td class="text-center">46 - 54 %</td>
    </tr>
    <tr>
        <td colspan=2 class="text-right"><strong>Runoff reduction estimate</strong></td>
        <td class="text-center"><strong>85 %</strong></td>
    </tr>
</table>
</div>
<div class="col-md-12">

Revision as of 14:09, 11 August 2017

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.

Design Location Runoff reduction
No underdrain Washington >98 %
No underdrain United Kingdom >94 %
With underdrain Maryland 46 - 54 %
colspan=2 Runoff reduction estimate 85 %