Hello. I am trying to model the estuary of the Negro River. I've been trying for a long time to find a suitable model, but I can't get the model to run correctly.The domain is as follows (due to the availability of metering stations). I have the following options:1- Model with a single grid for the entire domain including the section of the Negro River (blue box in image 1).2- Model a parent model and then include a submodel with a curvilinear grid for the river (image 2).According to what you can see, what can you advise me?I was trying to run the model with the option mentioned in point 1, and this throws the error that I show in image 3.Is there any possibility of being able to do these queries in a personalized way? Thanks.
Hello Gabriel,
It's important to know what the objective of the model is to better help you guide you in laying out the areas you need to simulate.
1) This is a valid option but the area of simulation is very wide and to be able to simulate the river accurately you'll need a very fine grid, which will result in a very large number of grid cells
2) Nesting a submodel is the best approach. If you want to run the river using a curvilinear grid you'll need to setup the parent grid also as curvilinear. The nested grid needs to have the same orientation as the parent grid. You can use the "Create Nested Grid" tool to create a nested grid from the parent grid.
From the images you've presented it seems that there is a clear inconsistency in the bathymetry values of the nested (river) model and the parent (coastal) model. You must make sure the bathymetric referential you're using in both grids is the same. Also if there are intertidal areas at the nested model open boundary (i.e. grid cells than get wet and dry during the simulation) this is normally cause for creating numerical instabilities.
From figure 3 however I see that the model is "crashing during the construction phase not during calculations. Could you send the model files so we can have a look and see what's causing the problem? Thanks and regards,Luis