Changes

<p>Infiltration of stormwater into underlying soils is one the priority level 1. mechanisms to achieve MOECC Runoff Volume Control targets. In many areas of Ontario, where municipal supplies of potable water are drawn from aquifers, it's also an important mechanism to recharge groundwater supplies.</p>

<p>Infiltration of stormwater into underlying soils is one the priority level 1. mechanisms to achieve MOECC Runoff Volume Control targets. In many areas of Ontario, where municipal supplies of potable water are drawn from aquifers, it's also an important mechanism to recharge groundwater supplies.</p>

{{TextBox|1= Infiltration is promoted through a number of LID BMPs:

{{TextBox|1= Infiltration is promoted through a number of LID BMPs:

#the underlying bedrock is within 1 m below the bottom of the proposed BMP, or

#the underlying bedrock is within 1 m below the bottom of the proposed BMP, or

#the seasonal high groundwater level comes within 1 m below the bottom of the proposed BMP.

#the seasonal high groundwater level comes within 1 m below the bottom of the proposed BMP.

 

===Designing with constraints===

===Designing within constraints===

{{TextBox|1= Infiltration can still be optimized over 'tight' soils with infiltration rates ≤ 15 mm/hr:

{{TextBox|1= Infiltration can still be optimized over 'tight' soils with infiltration rates ≤ 15 mm/hr:

*[[Bioretention: Internal water storage |Bioretention with internal water storage]]

*[[Bioretention: Internal water storage |Bioretention with internal water storage]]

*[[Green roofs]]

*[[Green roofs]]

}}

}}

===Planning===

===Planning===

<h4>Soil infiltration rate</h4>

<h4>Soil infiltration rate</h4>

<p>The bottom of the infiltration BMP must ≥ 1 m vertically separated from the seasonally high water table, and underlying bedrock. This reduces the risk of contaminating groundwater and helps to ensure reliable infiltration rates throughout the year. </p>

<p>The bottom of the infiltration BMP must ≥ 1 m vertically separated from the seasonally high water table, and underlying bedrock. This reduces the risk of contaminating groundwater and helps to ensure reliable infiltration rates throughout the year. </p>

[[category:Infiltration]]

[[category:Infiltration]]