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Water surface at downstream

  • Mar 23 2020
  • evannielfuentes

Hello, iRIC Software Experts!

I don’t understand what is happening with the downstream water surface level. At first, I tried to input the tide level selecting “read from file” with varying tide level however the result does not seem to follow.
then I tried selecting “constant value” with the recorded highest tide level (2.1m) but then it gives the same result.

Please see attached consolelog and youtube link below.


iRIC does not ensure the safety of the attached file.


  1. evannielfuentes says:

    starting at 81600 sec, the downstream water level seems like breathing.

    Please advise

  2. UC-1h says:

    I don’t know why the calculation errors.
    I suggest the following trials to identify the cause.
    Try to refine calculation mesh.
    Try to adjust dt(calculation time step)
    Try to calculate in a narrow range.

  3. evannielfuentes says:

    Thank you for your reply.
    What I did is I created a new project with the same data. The result was different, gave me a better output.

    Is it possible to generate cross section with with equal interval, say at every 20 meters, and with reflected max depth after calculating in Nays2dFlood?

  4. UC-1h says:

    It is possible to generate cross section by using the two functions.

    Function for extracting calculation result on arbitrary cross-section


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