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Line 11:
Line 11: − + − + − + − + − + − + + + + − <li>[[Partially infiltrating bioretention]]</li>
→Constraints
Infiltration practices are not recommended:
Infiltration practices are not recommended:
<ol>
<ol>
<li>Where the bedrock is within 1 m below the bottom of the proposed BMP.</li>
<li>Where the bedrock is within 1 m below the bottom of the proposed BMP,</li>
<li>Where the seasonal high groundwater level comes within 1 m below the bottom of the proposed BMP. <br>Or in areas where increased infiltration will result in elevated groundwater levels, which can be demonstrated to damage critical utilities or private property. </li>
<li>Where the seasonal high groundwater level comes within 1 m below the bottom of the proposed BMP,<br>Or in areas where increased infiltration will result in elevated groundwater levels, which can be demonstrated to damage critical utilities or private property,</li>
<li>Over swelling clays or unstable sub-soils</li>
<li>Over swelling clays or unstable sub-soils,</li>
<li>Over contaminated soils or sites with high risk of contamination from onsite activities </li>
<li>Over contaminated soils or sites with high risk of contamination from onsite activities, </li>
<li>In flood prone areas where the wastewater system is sensitive to groundwater conditions causing sewer backups, and where LID BMPs have been found to be ineffective. </li>
<li>In flood prone areas where the wastewater system is sensitive to groundwater conditions causing sewer backups, and where LID BMPs have been found to be ineffective,</li>
<li>In areas where the ecology and natural hydrology are dependent upon surface water. </li>
<li>In areas where the ecology and natural hydrology are dependent upon surface water,</li>
<li>Where prohibitions and/or restrictions exist per approved Source Protection Plans (see MOECC guidance).
<li>Where prohibitions and/or restrictions exist per approved Source Protection Plans (see MOECC guidance).
</ol>
</ol>
<br><p>
Infiltration can still be optimized over 'tight' soils with infiltration rates ≤ 15 mm/hr:
<li>[[Partially infiltrating bioretention]]</li></p>
<br>
<br>
<p>Without infiltration, many LID design alternatives exist which can still capture and retain stormwater:
<p>Without infiltration, many LID design alternatives exist which can still capture and retain stormwater:
<ul>
<ul>
<li>[[Bioretention planters]]</li>
<li>[[Bioretention planters]]</li>
<li>[[Rainwater harvesting]]</li>
<li>[[Rainwater harvesting]]</li>