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Line 80:
→Drawdown time to empty facility
<math>t=\frac{d}{K}</math>
<math>t=\frac{d}{K}</math>
==Drawdown time to empty facility==
==Drainage time to empty facility==
[[file:Hydraulic radius.png|thumb|Three footprint areas of 9 m<sup>2</sup>.<br>
[[file:Hydraulic radius.png|thumb|Three footprint areas of 9 m<sup>2</sup>.<br>
From left to right x = 12 m, x = 20 m]]
From left to right x = 12 m, x = 20 m]]