Difference between revisions of "Bioswales: Performance"

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|With underdrain||Maryland||46 - 54 %
|With underdrain||Maryland||46 - 54 %
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|colspan="2"<strong>Runoff reduction estimate</strong>||<strong>85 %</strong>
|colspan="2"|<strong>Runoff reduction estimate</strong>||<strong>85 %</strong>
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Revision as of 14:13, 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 %
Runoff reduction estimate 85 %