This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

Estuary with tidal intrusion

Hi, I'm trying to simulate an estuary (the mouth of a river in the sea) but I can't find any information about the steps to follow to model the river that flows into the sea. I have already simulated the tidal hydrodynamic model in the estuary domain using MOHID Water. Then you should do a hydrodynamic model for the whole (tide + river discharge). Is there a guide with steps to follow for this type of simulations? Where can I find it? The explanations I have found are applied to MOHID Land, land drainage, urban flooding.
Thank you.

Parents Reply Children
  • Hi Gabriel, we are looking into this and will get back to you shortly.


    Regards,

    Jesse Dringoli
    Technical Support Manager, OpenFlows
    Bentley Communities Site Administrator
    Bentley Systems, Inc.

  • Hello Gabriel,

    I took a look at your model setup and: 

    You've setup the "father" model hydrodynamic module to output time series results and set a path to the time series location file that does not exist

    I have fixed that and ran the model. Then I got an error message related with the existence of isolated grid cells in your bathymetry files (both for the father and the son model). This results in the model generating a corrected bathymetry file. So far so good, but for some reason it seems that FLOOD is also activating an option that if this happens the simulation does not stop. To fix this you should open both the father and son Model.dat input files in a text editor and change: 

    STOP_ON_BATHYMETRY_CHANGE : 0

    to 

    STOP_ON_BATHYMETRY_CHANGE : 1

    Then run the simulation again and after it starts the model will stop and warn you that it has changed the bathymetry. You should then change the bathymetry file path to the newly generated file. You'll have to do it for the father and son domains,

    After I've fixed  it and ran the simulation, another error is produced: 

    ReadAssimilationFilesName - ModuleAssimilation - ERR01

    This is caused by the fact that in the "son" domain Hydrodynamic module you've set to True the option Data Assimilation and Flow Relaxation. 

    When you do that you'll need to activate the Assimilation module in your simulation options and then configure it accordingly. Given your simulation consists of two 2D domains forced only by tide, you'll possibly don't even need to activate the Data Assimilation and Flow Relaxation. In case you want to do it you may want to look at this article from the MOHID Water wiki (see example 2): 

    Please let me know if this solves your problem or if you need any additional information. 

    Kind regards,
    Luis

     

  • Hi Luis, thanks for your reply.

    I will try these steps to avoid errors.
    Do you think that I can configure the model in another way to make it a little more practical (simplify) to execute? This means, correcting the grids, using other types of grids, improving the bathymetries?
    I will appreciate your reply.
    Sincerely,

    Gabriel

  • Hi Gabriel,

    Without knowing the details and objectives of your simulation, I can't make many recommendations, but looking now in a little more detail to your grids/bathymetries I see the following: 

    1) the father grid has many areas that possibly didn't have enough bathymetry data and you've possibly chosen not to extrapolate during the bathymetry interpolation process. This produces many areas where the bathymetry is set to -55 (which is a default in OpenFlows FLOOD for undefined bathymetry value). If you play with the bathymetry color scale and plot all values below zero with a violet color you should see those areas easily, see example below (but there are at least 7-8 areas like this). 

    2) The son grid does not have sufficient resolution to model the upstream part of the river (see image below). The resolution should allow for adjacent grid cells to share a face. If not flow will not pass from one to the other. Also, the son bathymetry has the same problems in some areas as described in point 1)

    Having more details on what you're trying to simulate I could make other suggestions .Maybe use a curvilinear grid for the river?

    Hope this helps. Kind regards;
    Luis

  • Thank you for your response and I apologize for the delay in my response. I have managed to solve the problem but due to the resolution of the grid, I have not been able to simulate the river. To solve this problem, I have tried to make a curvilinear grid, but the software throws an error that I show below.
    I will be grateful if you can guide me to solve the problem.