Changes

==Planning considerations==

==Planning considerations==

===Location===

===Location===

Dry ponds are a useful tool for managing flooding during larger storm events. They are well suited to being placed downstream of other smaller distributed BMPs for occasional backup flood protection.  

Dry ponds are a useful tool for managing flooding during larger storm events. They are well suited to being placed downstream of other smaller distributed BMPs as an end-of-pipe feature for occasional backup flood protection. Where possible, they should be integrated into amenity space, given that users rarely wish to continue outdoor activities during such intense rainstorms.  

Where possible they should be integrated into amenity space, given that users rarely wish to continue outdoor activities during such intense rainstorms.  

===Infiltration===

===Infiltration===

For information about constraints to infiltration practices, and approaches and tools for identifying and designing within them see [[Infiltration]].

For information about constraints to infiltration practices, and approaches and tools for identifying and designing within them see [[Infiltration]]. For guidance on infiltration testing and selecting a design infiltration rate see [[Design infiltration rate]].

For guidance on infiltration testing and selecting a design infiltration rate see [[Design infiltration rate]].

===Risk===

===Risk===

Where temporary storage of water occurs on the surface the depth and rate of rise of the water should be sufficiently low that risks posed by the water body are minimized for site users (taking into account the temporary nature of the storage facility which will mean that the public are not accustomed to its presence). A risk assessment should be undertaken of the frequency and rate of flooding to a range of inundation depths in order that public safety is not jeopardised. <ref name=Ballard>Ballard, B. W., Wilson, S., Udale-Clarke, H., Illman, S., Scott, T., Ashley, R., & Kellagher, R. (2015). The SuDS Manual. London.</ref>

Where temporary storage of water occurs on the surface the depth and rate of rise of the water should be sufficiently low that risks posed by the water body are minimized for site users (the temporary nature of the storage facility will mean that the public are not accustomed to its presence). A risk assessment should be undertaken of the frequency and rate of flooding to a range of inundation depths in order that public safety is not jeopardised. <ref name=Ballard>Ballard, B. W., Wilson, S., Udale-Clarke, H., Illman, S., Scott, T., Ashley, R., & Kellagher, R. (2015). The SuDS Manual. London.</ref>

==Design==

==Design==