Changes

{{Clickable button|[[Media:Infiltration Sizing.xlsx|Download .xlsx calculation tool]]}}

{{Clickable button|[[Media:Infiltration Sizing.xlsx|Download .xlsx calculation tool]]}}

==One dimensional infiltration==

==To calculate the required depth, where the area of the facility is constrained (1D)==

To calculate the required depth, where the area of the facility is constrained:

<math>d=\frac{D\left[\left( \frac{I}{P} \right )i-q \right]}{n}</math>

<math>d=\frac{D\left[\left( \frac{I}{P} \right )i-q \right]}{n}</math>

To calculate the require facility area or footprint where the depth is constrained:

==To calculate the require facility area or footprint where the depth is constrained (1D)==

<math>P=\frac{IiD}{nd+qD}</math>

<math>P=\frac{IiD}{nd+qD}</math>

<h3>Drawdown time</h3>

==Infiltration of surface ponding time==

The following equation assumes that infiltration occurs primarily through the footprint of the facility.

The following equation assumes that infiltration occurs primarily through the footprint of the facility.

It is best applied to calculate the limited duration ponding on the surface of [[bioretention cells]], [[bioswales]] and [[enhanced grass swales]].

It is best applied to calculate the limited duration ponding on the surface of [[bioretention cells]], [[bioswales]] and [[enhanced grass swales]].  

 

 

To calculate the time (''t'') to fully drain the facility through the footprint area only:  

To calculate the time (''t'') to fully drain the facility through the footprint area only:  

<math>t=\frac{nd}{q}</math>

<math>t=\frac{nd}{K}</math>

==Three dimensional infiltration==

==Three dimensional infiltration==