AutoCAD Civil 3D - Stormwater

AutoCAD Civil 3D - Stormwater

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Accepted Solution

IDF table error

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07-20-2012 07:59 AM

For some reason, in the IDF rainfall curve window, when i enter my rainfall data into the IDF table tab i receive the following "Data Error": "No Solution: values may be non-uniform or unrealistic. values should increase with return peroid"

 

The problem is i have tried 3 sets of data. one that i know has worked in the past and i am still getting the same error. the rainfall data is from a government website so the numbers should be good.

 

has anyone experienced this problem before?

Be sure to use the "Precipitation intensity" Data Type from the NOAA website rather than the "Precipitation depth".

 

Sounds like you are using the depth values.

Employee
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Registered: ‎05-13-2005
Post 2 of 4

Re: IDF table error

07-20-2012 08:05 AM in reply to: Lyonstp

Which program and what set of numbers are you using?

Matthew Anderson, PE
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Re: IDF table error

07-20-2012 08:32 AM in reply to: Matt.Anderson

sorry, i forgot to mention that. I am using Hydraflow Hydrographs extension for Civil 3D. The data i am using i got off of the NOAA website, they are  "PDS-based point precipitation frequency estimates" i'm using the 1,2,5,10,25,50 & 100 year storm events with 5,10,15,30, 60 minute durations.

Employee
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Registered: ‎05-13-2005
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Re: IDF table error

07-20-2012 09:51 AM in reply to: Lyonstp

Be sure to use the "Precipitation intensity" Data Type from the NOAA website rather than the "Precipitation depth".

 

Sounds like you are using the depth values.

Matthew Anderson, PE
Product Manager
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