Quote:
Originally Posted by coffeebean
So far, with the storms I have experienced her in The Villages, there has been zero accumulation of water in the street in front of my home. Anyone know how much rain water would stress our water management system in a specific time frame to the point that storm water would enter homes?
|
The drainage system is designed for a "100 year storm event", which is a storm that has so much rain, it's likely to occur only once in a 100 years ... or, a 1% chance of occurring in a given year. In the case of Sumter County, this would mean a storm event which produces approximately 12" of water in a 24 hour period.
The drainage designs have some amount of "built in margin of error", but as always with a computer analysis, the conclusions are only as good as the input.
2 back to back "50 year storms", potentially could yield similar results as a 100 year storm.
I'm not sure how long it takes for the system to recover from a 100 year storm, I suspect it's 72 hours. In other words, if we got 12" of rain in a 24 hour period, it would take 3 days for the system to handle a subsequent 12" of rain, in a 24 hour period.
Just because an event occurred that was greater than a 100 year storm (or back to back events), that doesn't mean homes would flood. It means that the storm water drainage system would be over-whelmed and there would be accumulations of water, where there shouldn't be any. In most cases, the majority of homes would still be above the storm water elevation. Localized conditions could vary.