Include Conduit flow travel time in design option in StormCad and CivilStorm

Question

I am using stormcad v8i select series 5 and civil storm v8i select series 5 version with micro station , I Kept the " Include Conduit flow travel time in design " to true, in both applications, but it is taking only rainfall intensity corresponding to minimum travel time (i.e; 10 min. ).Accordingly I am getting larger flows and large pipe sizes in rational method. Is there any specific reason for that. one more thing first I made the layout in CivilStorm and then tried the same model by opening in stormCad. need urgent solution.

Jesse Dringoli · Accepted Answer

Hello Prasad, thanks for sending the files. It appears that there is some type of corruption in your IDF curve and the program appears to be reading the wrong intensities. To resolve this, please create a new IDF storm event and re-add your return events, durations and intensities. I did this manually for the 2 year event, copy/pasting the list of durations and intensities. I switched the rainfall runoff alternative to this new return event and after computing, the conduit intensity values appeared to be correct. 
 Note that I tested this in the latest version, 10.00.00.45. Please check in your version and let us know if this helps.

Include Conduit flow travel time in design option in StormCad and CivilStorm

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