8,254
edits
Changes
Jump to navigation
Jump to search
Line 63:
Line 63:
Infiltration: Sizing and modeling (view source)
Revision as of 16:00, 7 September 2017
, 7 years ago→Three dimensional infiltration
The rearrangement to calculate the required footprint area of the facility for a given depth is not available at this time. Elegant submissions are invited.
The rearrangement to calculate the required footprint area of the facility for a given depth is not available at this time. Elegant submissions are invited.
<h3>Drawdown time</h3>
The design of infiltration facilities should be checked for [[drawdown time]]. Target drawdown time is between 48-72 hours.
To calculate the time (''t'') to fully drain the facility:
To calculate the time (''t'') to fully drain the facility:
<math>t=\frac{nP}{qx}ln\left [ \frac{\left (d+ \frac{P}{x} \right )}{\left(\frac{P}{x}\right)}\right]</math>
<math>t=\frac{nP}{qx}ln\left [ \frac{\left (d+ \frac{P}{x} \right )}{\left(\frac{P}{x}\right)}\right]</math>