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kgf36 (Civil/Environme)
24 Mar 08 12:26
Hi,
I had tried to create a different thread on a similar subject, but it appears that it has not gone through, so I'm trying again. (sorry if I post twice)
So for a small site, the rational method can be used to find storage volumes for detention basins, is that correct? And if so, how can one find the storage volume for the 100 year 24 hour storm if the IDF curve only goes up to 120 minutes?
cvg (Civil/Environme)
24 Mar 08 13:13
the rational method is not recommended for analyzing a detention basin. the modified rational may be used possibly for conceptual level analysis, however still not recommended. Stick with a rainfall - runoff model which generates a hydrograph and can route the hydrograph through your basin.
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tsgrue (Civil/Environme)
24 Mar 08 20:00
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I suggest reading the thread 鈥淰olume of Runoff Rational Method Formula鈥
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