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Also known as infiltration basins.  

Also known as infiltration basins. Dry ponds are a grassed alternative to [[bioretention]] cells. This permits the landscape to be accessed and used as an amenity space.

 

==Overview==

==Overview==

Dry ponds are recommended as [[flood control]] structures to accommodate occasional excess overflow downstream of other structural BMPs. They should be integrated into the landscape as useful, accessible public space.

Dry ponds are recommended as [[flood control]] structures to accommodate occasional excess overflow downstream of other structural BMPs. They should be integrated into the landscape as useful, accessible public space.

===Sizing===

===Sizing===

The surface storage volume of a dry pond (''A_p'') is determined:

The surface storage volume of a dry pond (''A_p'') is determined:

<math>A_{p}=\frac{RVC_T\times A_{c}}{f'\times t}</math>

<math>A_{p}=\frac{RVC_T\times A_{c}}{f'\times t}</math>

*''f''' = design infiltration rate (mm/hr)

*''f''' = design infiltration rate (mm/hr)

*''t'' = [[drainage time|time permitted for ponding to infiltrate]] (hrs) (typically 48 hours)}}

*''t'' = [[drainage time|time permitted for ponding to infiltrate]] (hrs) (typically 48 hours)}}

===Modeling===

===Modeling===

{{:Dry ponds: TTT}}

{{:Dry ponds: TTT}}

==Gallery==

==Gallery==