Using Display Options with Multiple UGrids

Have you experienced setting display options for an unstructured grid only to see those settings not take? In GMS, each unstructured grid (UGrid) uses its own set of display options. A common reason for display settings not appearing is selecting the wrong UGrid when you have multiple UGrids.

Changing the UGrid display settings will only affect one UGrid at a time. So it is important to make certain the correct UGrid display options are being changed.

There are three ways to reach the Display Options dialog for UGrids:

  • Display Options macro
  • Display Options command in the Display menu
  • Display Options command in the UGrid Data right-click menu in the Project Explorer
Display Options list showing multiple UGrids

Once in the Display Options dialog, check to see which UGrid is active. This is done by looking a the list on the left side of the dialog. The list on the left will indicate which By default, the display option will be set for the active UGrid. So one method to make certain you are setting display options for the correct UGrid, it to make certain that UGrid is the active UGrid in the Project Explorer before entering the Display Options dialog.

Multiple UGrids in the Project Explorer

The Display Options dialog can be used to change display settings for a UGrid that is not active. This is done by selecting the desired UGrid from the list on the left in the dialog. It should be noted that selecting a UGrid in th Display Options dialog does not cause the UGrid to become the active UGrid in GMS. So when you exit the Display Options dialog, you may need to change which UGrid is active in the Project Explorer to see the display setting changes.

It should be noted that which UGrid is active also matters when accessing the Dataset Contours Options dialog.

Hopefully, this helps clarify how to set display options in projects that have multiple UGrids. Make use of Ugrids disaply options in you project using GMS today!

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Converting a 3D Dataset to a 2D Dataset

It sometimes happen where you have a fully developed 3D model in GMS and need to transfer a dataset from the 3D model to a 2D model. GMS provides a way to convert a dataset on a 3D grid to a 2D grid. From there the dataset can be exported as 2D data for use in a 2D model.

To acquire a 2D dataset from a 3D dataset, you need the following:

  • 3D grid
  • 2D grid
  • 3D dataset

To convert a 3D dataset to a 2D dataset, do the following:

  1. In the Project Explorer, select a dataset under a 3D Grid.
  2. Use the Grid menu to select the 3D Data → 2D Data command.
  3. Select option in the 3D Dataset → 2D Dataset dialog.
3D dataset to 2D dataset

The 3D Dataset → 2D Dataset dialog allows choosing which dataset to converted. By default, the dialog will use whichever 3D dataset is active in the Project Explorer. If another dataset is desired, from a MODFLOW simulation for example, you can make the change in the dialog..

The dialog also allows creating the new 2D dataset using one of the following parameters:

  • Maximum value in ij column
  • Minimum value in ij column
  • Average value in ij column
  • Sum of values in ij column
  • Highest active value in ij column
  • Value from k layer

K represents the layer number with 1 being the surface layer, and J and I representing the x and y locations of a cell (or column of cells) in the grid.

Keep in mind that one of the grids could be covering the other so if you want to observe specific data, you may need to turn off other data.

Additional additional information about converting 3D grids to other data can be found on our wiki.

Try out converting 3D datasets to 2D datasets in GMS today!

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Common Installation Issues with XMS

Are you having trouble installing GMS, SMS, or WMS? Here are three common installation issues, and how to overcome them.

Virtual Machines

The main issues when using virtual machines is selecting the correct type of installation. Single-user locks are not compatible with virtual environments. If you are trying to install XMS with a single-user lock and a virtual machine is detected, XMS will not install. You will need a network lock to get around this issue. Network locks are designed to be used with virtual machines. Single-user locks are not capable of being used as a network lock.

Firewalls and User Permissions

Sometimes, a good password will fail to install XMS, This is because your computer actually needs to contact our servers to verify the authenticity of the password. When an internet error comes up, it's typically related to a firewall, user permissions, or antivirus software blocking the connection to our servers.

Try one of these solutions to resolve this issue:

  • Whitelist which ever XMS program you are trying to install and the registration wizard.
  • Temporarily disable the firewall/antivirus software.

Note that firewalls are typically something each company's IT department handles.

If you are running Windows 8 or 10, and you are not running in a virtual environment, then the issue could be caused by a Windows feature called Hyper-V. Disabling Hyper-V can resolve the problem. You can find instructions on how to disable Hyper-V by reading this article.

Hardware locks

When installing a hardware lock, be sure to have your drivers installed and running before attempting to register the lock. Additionally, please also ensure that the lock is plugged into the computer at the time you are attempting to register. (Note that as a security measure, the reburn cannot take place remotely.) For instructions on how to install your specific type of hardware lock please visit our page here.

Feel free to contact our technical support team at for more individual help in troubleshooting any of these problems. Please recognize that Aquaveo technical support can only help troubleshoot individual machine issues to a certain point.

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Changing an Existing Model to be a Predictive Model

When you have a completed GMS model, you can use that same model to create a predictive model. A predictive model is used to make predictions based on hypothetical future scenarios. For example, you may need to create a model that predicts if an aquifer will experience strain with an increased population drawing from the aquifer in the model area.

Groundwater model

In general, a predictive model is created by using an existing model, then altering an aspect of that model based on the hypothesis. You then run the model again and compare your results with your prediction. Any version of MODFLOW, or any of the other available numeric models in GMS, can be used to create a predictive model.

One method of setting up a predictive model might be as follows:

  1. Create and run a steady state model
  2. Calibrate the model to reduce error in the predictive model
  3. Set the transient settings to a future date
  4. Run the transient model

It is important for you to have an expectation of the outcome of the model run so that you can compare the results with that expectation. When the model run is completed, carefully review the model run results to determine the accuracy of the predictions. When creating a predictive model, you can make use of stochastic analyses.

If the predictive model seems to be far outside of your expectations, then you will need to troubleshoot the existing model before running the predictive model. Using a poorly developed existing model often leads to issues in the predictive model. Make certain the existing model has been well calibrated to closely match the field-observed values. If possible, calibrate the existing model to multiple sets of observation data before creating a predictive model.

Now that you know some of the principles in developing a predictive model, creating your own predictive model in GMS today!

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