Changes

The exceptions are the depth (''d'') and Permeable area (''P''), as only one of these is required to find the other.  

The exceptions are the depth (''d'') and Permeable area (''P''), as only one of these is required to find the other.  

Note that some of these parameters are limited:

Note that some of these parameters are limited:

*The ''maximum'' total depth will be limited by construction practices i.e. not usually > 2 m.

#The ''maximum'' total depth will be limited by construction practices i.e. not usually > 2 m.

*The ''maximum'' total depth may be limited by the [[Infiltration| conditions underground]] e.g. the groundwater or underlying geology/infrastructure.

#The ''maximum'' total depth may be limited by the [[Infiltration| conditions underground]] e.g. the groundwater or underlying geology/infrastructure.

*The minimum total depth may be limited by the need to support vegetation i.e. not < 0.6 m.

#The minimum total depth may be limited by the need to support vegetation i.e. not < 0.6 m.

 

#The area P for a [[green roofs]], [[absorbent landscapes]] and [[permeable paving]] may be very similar or equal to the catchment area, so that the I/P ratio is close to 1.

 

#[[Infiltration trenches]], [[Infiltration chambers| chambers]] and [[bioretention cells]] have a maximum recommended I/P ratio of 20.

*The area P for a [[green roofs]], [[absorbent landscapes]] and [[permeable paving]] may be very similar or equal to the catchment area, so that the I/P ratio is close to 1.

*[[Infiltration trenches]], [[Infiltration chambers| chambers]] and [[bioretention cells]] have a maximum recommended I/P ratio of 20.

{|class="wikitable"

{|class="wikitable"

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

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

<strong>[[Media:Infiltration Sizing.xlsx|Download .xlsx calculation tool]]</strong>

<strong>[[Media:Infiltration Sizing.xlsx|Download .xlsx calculation tool]]</strong>

[[category: modeling]]

[[category: modeling]]

[[category: infiltration]]

[[category: infiltration]]