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.
Hello Gabriel,
Are you simulating a coastal scenario? You can look at setting up such a simulation here: Input wave parameters in a coastal simulation. Have you setup this simulation already?
Do you want to model flooding due to tidal intrusion front?
Can you please elaborate a bit more on what you want to simulate?
Regards,
Yashodhan Joshi
Hello Yashodhan,
Hello. Thanks for your reply. I am trying to simulate the hydrodynamic model at the mouth of a river. This is about a river that flows into the sea and I need to calculate how the river currents interact with the variation in sea level.To accomplish this, I ran a 2D model of the ocean side to get the tide in the river mouth domain. I understood that now I should nest the river simulation, correct? At the moment I don't need to calculate waves.
OK, I will provide detailed information on how to setup a nested submodel in OpenFlows FLOOD in the form of a wiki article soon.
Thanks and regards,Luis
Please check the article about Nesting sub-models in coastal applications in OpenFlows FLOOD. It contains a walkthrough guide with all the steps necessary to refine your solution using a nested model approach.
Please let me know if you have any additional questions.
Kind regards,
Luis Fernandes
Thank you very much!I will be testing this suggestion.Regards,
Gabriel Huck
Hello. Thank you for always responding to our queries.In this case I would like to tell you that I have followed the instructions step by step to make the model of the estuary, but even so, the nested hydrodynamic model is not created. The problem is that, by not being able to identify the error, we do not know what it is due to.What can be happening?Is it possible to make a nested model with a curvilinear grid? If possible, where can I find this information?Thanks.
Gabriel,
Can you elaborate on what you mean by "not created"? Are you encountering any message, or are you attempting to complete some action and nothing happens? Any details you can provide (including your FLOOD version number) would be helpful for troubleshooting.
It may also be helpful for you to provide all the files necessary for us to attempt to reproduce the issue. See: How to Export and Import OpenFlows FLOOD Workspaces
Jesse DringoliTechnical Support Manager, OpenFlowsBentley Communities Site AdministratorBentley Systems, Inc.
Jesse, thanks for your help.When I say: "it is not created", I mean that the nested hydrodynamic model is not executed (run).I attach below the exported model, maybe you can test it and identify the error.Thank you very much.Good day!Gabriel Huck
drive.google.com/.../116c3zrW-3bgVCPDvM60-RYLKSCgU0tfw
Hi Gabriel, we are looking into this and will get back to you shortly.
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