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re: How years of storm water pond construction are causing issues in Baton Rouge metro area
Posted on 9/14/21 at 9:54 am to CarRamrod
Posted on 9/14/21 at 9:54 am to CarRamrod
quote:
storm water pond constructions isnt causing these issues
You're wrong, though. The ponds are only designed to manage between a 4% and 10% annual probability event. Beyond that, they absolutely allow the development to increase discharge into our streams. We've seen 2 events under 0.2% annual probability in the last 5 years. We see multiple 1% events each year. Until Atlas 14 is updated in about a year, we're going to see that the design storms are pretty grossly underestimated.
We are rapidly altering the hydrology of the parish with all the development. Unfortunately, the developers are going to push back hard against the needed reforms, and capitalism will defeat common sense once again.
Posted on 9/14/21 at 10:04 am to Galactic Inquisitor
quote:
Until Atlas 14 is updated in about a year, we're going to see that the design storms are pretty grossly underestimated.
This is another good point about the frequency data. A lot of the existing infrastructure was designed with frequency data from TP-40, which had a publication date in 1961.
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