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__NOTOC__
__NOTOC__
<div class=floatright>
<imagemap>
Image:Infiltration.png|thumb|700 px|This is an image map; clicking on components will load the appropriate article.
|url=https://www.lucidchart.com/documents/embeddedchart/631751be-b877-47b3-9117-86a79a5bf2b0"
poly 315 507 208 555 317 605 423 555 [[Drainage time]]
rect 210 658 426 730 [[Details]]
rect 568 522 728 594 [[Underdrain]]
poly 73 27 39 75 75 126 179 126 215 78 181 27 [[Infiltration]]
poly 268 25 235 75 270 123 364 124 395 76 365 25 [[Infiltration: Testing]]
</div>
rect 237 185 397 225 [[Select BMP type]]
rect 238 266 397 329 [[Bioretention: Sizing]]
</imagemap>
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{{textbox|
{{plainlist|
{{plainlist|
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}{K}</math>
<math>t=\frac{d}{K}</math>
==Drawdown time to empty facility==
==Drawdown time to empty facility==