Retention ponds why do we need them? My sub-division has two. Can’t the water just get drained to the river?
In: Engineering
Aquatics Tech here. Retention and detention ponds main function is to slow down water entering the drainage system. This is to prevent flooding and erosion. A pond should have a functioning forebay at every inlet. This is like a tiny pond for the main pond. The forebays are meant to trap debris, heavy metals, and sediment. This way one small spot can be dredged instead of the whole pond.
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