Retention ponds why do we need them? My sub-division has two. Can’t the water just get drained to the river?
In: Engineering
During a storm, the peak water levels can last as little as 10 minutes. If you can reduce that peak even a little, then flooding downstream can be prevented.
Where I live, they encourage everyone to have a small 100L water butt attached to domestic roofs, just to help a little bit. If enough people do this, neighbours could be saved from flooding.
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