Dear all,
my 2 question refer to the rainfall events calculator.
1) the percentil is calculated on the historical data sheet. The amount is expressed in mm. On the next page "strategies" the "runoff volume required to be managed on site" has to be filled in in cu m. Does it have to be calculated in the following manner? (inteded percentil value - Depression storage- infiltration loss)*365 days * A? I am a bit confused by the use of the 2 different units "mm" and "cu m"...
2) is it correct to multiply the surface area for each Strategie with ist runoff coefficient to obtain the runoff volume managed?
Thank you very much for your answer in advance!
Michael DeVuono
Regional Stormwater LeaderArcadis North America
LEEDuser Expert
188 thumbs up
January 11, 2017 - 10:19 am
Hi Carmen,
mm is a depth of rainfall, cubic meter is volume.
There is a lot more to this credit than multiplying a few numbers together. Runoff volume is calculated via any number of generally accepted methodologies, but again, more involved than a simple math problem.
You really should have a civil engineer or hydrologist look at the calcs for this credit.
Carmen Mielecke
CEOLCEE Life Cycle Engineering Experts
4 thumbs up
January 12, 2017 - 3:42 am
Thank you very much for your answer! The question came from the hydrologist. The Problem is not the calculation in general. He is just unclear about the fill out of the tool.
Dominic Wade
May 18, 2018 - 7:36 am
Hi - i can't find the link to download the Rainwater Events Calculator v4.. Please can you point me in the right direction?
thks