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Continuity Error "Flow Routing"

Posted by Rawit Thaweesub on August 27, 2011 at 1:26pm

Hi

 

After run simulation, I got the continuity Error "Surface Runoff" is 1.70% and "Flow Routing" is 17.83%. I want to reduce error of flow routing then I have done manys thing that state in SWMM Help but It's not work.

 

Please advise me, how to do that.

 

Thank you.

 

 

 

 

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Replies

  • Rawit Thaweesub August 29, 2011 at 1:04pm

    Thank you very much again

     

  • Robert Dickinson August 27, 2011 at 7:28pm

    Thanks for pointing out your problems with the model.  It turns out that one of your pumps was pumping to  a node NOT connected to the rest of the network, but this should be a data error in the checking. 

     

    3293150234?profile=original

    • Sergio De Hoyos > Robert Dickinson January 9, 2014 at 5:26pm

      Dear Robert,

      I have a similar problem but my routing error is 26.93%. I already checked the model a couple of times and I can't seem to find the problem that is causing the error. What could be other sources of flow routing error in a SWMM model? Thank you for the blog, its a very helpful too!

      Sergio

      • Robert Dickinson > Sergio De Hoyos January 10, 2014 at 7:29am

        Just a short follow up note, you were using kinematic wave routing with a lot of channel storage:  
        The dynamic wave option will work better for you as it has a hot start file and more terms in the St Venant solution.  If you use both the hot start and dynamic wave you will have a small continuity error.

  • Rawit Thaweesub August 27, 2011 at 2:14pm

    Hi Robert,

     

    I already sent to your email.

    Thank you very much for your kindness.

     

     

  • Robert Dickinson August 27, 2011 at 1:57pm

    Hi Rawit,

    Can you send me your model to robert.dickinson@gmail.com - it is always easier to answer these questions with the model.

This reply was deleted.