Changes

Narrow, linear cells drain faster than round or blocky footprint geometries.

Narrow, linear cells drain faster than round or blocky footprint geometries.

Divide the area of the practice (''A_p'') by the perimeter (''P'').

Divide the area of the practice (''A_p'') by the perimeter (''P'').

 

==Step 3==

==Step 3==

The 'bowl' area is simply the depressed elevation of the surface compared to the surrounding areas; a space to permit temporary ponding.  

The 'bowl' area is simply the depressed elevation of the surface compared to the surrounding areas; a space to permit temporary ponding.  

The depth of the bowl would not typically exceed 0.5 m due to safety concerns.  

The depth of the bowl would not typically exceed 0.5 m due to safety concerns.  

To estimate the time (''t'') to fully drain the facility:  

To estimate the time (''t'') to fully drain the facility:  

:<math>t=\frac{V_{R}A_{p}} {q'P}ln\left [ \frac{\left (d+ \frac{A_{p}}{P} \right )}{\left(\frac{A_{p}}{P}\right)}\right]</math>

:<math>t=\frac{V_{R}A_{p}} {q'P}ln\left [ \frac{\left (d+ \frac{A_{p}}{P} \right )}{\left(\frac{A_{p}}{P}\right)}\right]</math>

 

==Final step==

==Final step==

Check the mounding of groundwater beneath the facility to ensure no incompatibility with nearby sensitive receptors.

Check the mounding of groundwater beneath the facility to ensure no incompatibility with nearby sensitive receptors.

{{Clickable button|[[File:Hantush.xlsx|Download mounding calculator(.xlsx)]]}}

{{Clickable button|[[File:Hantush.xlsx|Download mounding calculator(.xlsx)]]}}

Note that some adaptations have been made to this tool, from the original [https://pubs.usgs.gov/sir/2010/5102/ hosted by the USGS].

Note that some adaptations have been made to this tool, from the original [https://pubs.usgs.gov/sir/2010/5102/ hosted by the USGS].

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