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Thread: XPSWMM - Unusual 2D grid Values

  1. #1

    Join Date
    Jan 2018
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    12

    XPSWMM - Unusual 2D grid Values

    Hi,

    I am wondering if anyone is able to offer any advice as to why XPSWMM would generate unusual -99999 1D inactive domain grid depth values at the first timestep of a simulation, please see the attached image below, this error occurs at various random locations throught my inactive area.

    Am I likely setting up the model incorectly .

    Image1.jpg

    Cheers

  2. #2
    Senior Member

    Innovyze Employee



    Join Date
    Feb 2013
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    Quote Originally Posted by jaypappa View Post
    Hi,

    I am wondering if anyone is able to offer any advice as to why XPSWMM would generate unusual -99999 1D inactive domain grid depth values at the first timestep of a simulation, please see the attached image below, this error occurs at various random locations throught my inactive area.

    Am I likely setting up the model incorectly .

    Image1.jpg

    Cheers
    Hello, I have some feedback from XPSWMM Support - From the Tuflow
    User Manual


    TUFLOW uses the -99999 value as an internal code to indicatevalues which are not directly entered by the user, but inferred from othersources of data. If your search the document for “-99999” it shows up in manyinstances. For example, page 5-9, Table 5-1 has an instance in which the -99999value is used when the user doesn’t explicitly define the invert elevations fora channel and the inverts are obtained from the channel cross-sections.

    You mention inactive areas, so there might be data associated with those areaswhich he has not entered, and TUFLOW enters the value of “-99999” since it isinferring them from other data. You do not need to worry about the depth valueof -99999 being used, it is just an internal code used by TUFLOW.

  3. #3

    Join Date
    Jan 2018
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    12
    Quote Originally Posted by Robert Dickinson View Post
    Hello, I have some feedback from XPSWMM Support - From the Tuflow
    User Manual


    TUFLOW uses the -99999 value as an internal code to indicatevalues which are not directly entered by the user, but inferred from othersources of data. If your search the document for “-99999” it shows up in manyinstances. For example, page 5-9, Table 5-1 has an instance in which the -99999value is used when the user doesn’t explicitly define the invert elevations fora channel and the inverts are obtained from the channel cross-sections.

    You mention inactive areas, so there might be data associated with those areaswhich he has not entered, and TUFLOW enters the value of “-99999” since it isinferring them from other data. You do not need to worry about the depth valueof -99999 being used, it is just an internal code used by TUFLOW.
    Hi, Thankyou for explaining and clearing up this issue.

    Cheers

  4. #4
    Forum Moderator

    Innovyze Employee



    Innovyze Employee



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    May 2015
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    We are going to move this thread to the Wastewater forum as it is more relevant there.

    Patrick Moore

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