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  2. Dear All, I have a UGrid MODFLOW model and I want to use the layer elevations of this model for another model. Therefore, I want to convert the UGrid MODFLOW layers to 2D scatter points. Then it will be easy to interpolate to MODFLOW layers. It is easy to do this process in 3D Grid but it looks it is somehow complicated in UGrid. Thanks for your help and answer. Best regards, Aziz
  3. Hello Everyone, Can you inform me about the maximum limit of nodes to run FEMWATER in GMS. In my study domain there are 3830 nodes in 2D mesh and 72404 nodes in 3D mesh. Thank you in advance.
  4. Just realized I never replied, but it is a bug with GMS. Apparently, you cant use the EVT package if there are areas where your mode layers crop out. For example, my layer 1 only exists in part of the model domain. If you are trying to use USG and EVT in GMS it just wont assign the bondary condition. The developers are looking at it, but it hasn't been fixed yet to my knowledge.
  5. I am running GMS 10.5 with MODFLOW USG. I can run my model using either the PCGU or xmd solvers, but they have very long run times (greater than 24 hours for 26 stress periods). So I purchased the SAMG solver yesterday. I enabled it today and that went smooth. However, when I run the model (using any NONLINMETH), the model starts the first iteration and immediately crashes with no error given. I then tried running the model in the command line and got the following (below). Any ideas on how to get it working? I have contacted technical support, but thought someone here might have gone t
  6. I wonder if there is a way in GMS to define GHB head as a calibration parameter, i.e. to allow the model to change it during the calibration process.
  7. Hi, I am trying to use PHT3D for modelling a system with kinetic reactons. Can anyone suggest a tutorial or a research paper on how to do this? Thank you Kanchana
  8. I am working on a sediment transport model and trying to add a specified sediment inflow to the inflow boundary condition using the "file" option available in the SRH-2D Linear BC settings. I am creating a txt file and giving it a .dat file extension based on information from the SRH-2D sediment transport user manual but am running into the error below in the SRH-2D solver. I have tried different formats for the input .dat file but with no luck. Has anyone dealt with this before? Thanks.
  9. Dear all, How can one determine the mean annual wave height over the model grid from the wave model output of all the wave events and the frequency of occurence of each wave event. Can this be done in the dataset toolbox? How can one import the table of frequencies of occurence? Thanks for your assistance Regards Harris
  10. I have been trying to create a groundwater contour animation in GMS. It seems to work well for short duration timeseries of 300 stress periods, but when I try to create an animation of 3,000 stress periods, the animation seems to be created properly in GMS, but when I play the video, it is all scrambled and garbled. Is there a limit to the number of stress periods that you can use to create an animation?
  11. MT3DMS is not compatible with MODFLOW-USG with unstructured grids. It is possible that it would work with structured grids but I have not tried it.
  12. Thank you very much for your quick replies, Sean! It is very appreciated.
  13. Ooh....I *might* have come up with the answer. I recall something like this happening in the past for a transient run. I think the first stress period was okay, but then the rest weren't. You know how we use the box to check off using the previous stress period? I think that you might look at the button for "Edit All Use Previous" in the ET dialog box. If you see that they aren't all "1", then you may have some stress periods where you didn't enter data and it sees no ET. Look into that. Curious - what version are you using? I think I brought this issue up in the past, but I'm not sure
  14. Yes it does. There are even cells right next to a river that are not dry and GMS will not assign an EVT boundary condition to them because they are not in layer 1.
  15. Hello there, I am trying to make use of the fieldgen code as underlined in the GMS manual: https://www.xmswiki.com/wiki/GMS:Gaussian_Field_Generator I am using GMS v10.5. The model is 3-layers with a non-uniform structured grid. Hydraulic conductivities for layer 1 and 3 are parameterized using pilot points (~60 for each layer) and kriging. I am trying to generate random HK datasets for these two layers using the gaussian field generator option. When I try to run fieldgen for 20 realizations, I run into an error message that I can't really figure out, asking for a program recom
  16. Thanks, but it seems that I did not have any wells assign to the model boundary.
  17. My point on the New Conceptual Model is that you were asking why you couldn't add a Coverage. You can't make a coverage without first having a conceptual model (it doesn't have to have anything in it except your new coverage. I will have to look into it, but I'm wondering if you would be able to visually show the drain symbols and then export them as a shape file, pull them in as points, and then convert them to drains in a coverage....just brainstorming here. You would probably lose the attributes of the drain though. You might be able to export/copy them to Excel at some point, but t
  18. TomC

    Adding Drain Cells

    Thanks! I have edited them with the selection and Dialogue Box. A little onerous but its modelling. Recreating a New Conceptual model out of this 4,000,000 node model might be a BIG task for me. Is this possible by exporting and then importing to a New Conceptual frame work? Also - I am looking to evaluate individual drain node flows. I can only get total flow when selecting one or more nodes. I would like to export the CCF for a select number of drain cells to graph and evaluate.
  19. If you have a well activated that doesn't have any flow, you can just leave it. This is a warning, not an error that will be a problem. If you aren't supposed to have any wells without flow, then add a flow to them.
  20. Dear all, how to solve this warning?
  21. Does your ET depth actually reach the groundwater? That's all I can come up with quickly.
  22. That ended up being the problem. My TIN was created from the river coverage. So if the TIN did not fully cover a cell where the river coverage assigned a river BC, then the stage would be assigned a zero value. So, I had to make my transient TIN to overlap anywhere where the river coverage assigned a river BC before it would assign the proper stage.
  23. I am trying to use the EVT package with my transient MODFLOW USG model. Layer 1 represents some closed landfills only and then pinches out. Layer 2 represents the material below ground surface at the rest of the Site. EVT is only being applied to layer 1 (the landfill) and not layer 2 even though layer 2 is also the uppermost model cell where the landfill doesn’t exist. It does not matter which option I use to identify where evapotranspiration will occur (I.e. NEVTOP can be set at 1, 2, or 3 and this will still occur). Any suggestion on how to get EVT to work?
  24. Anybody else have this problem? After a month or 2 the grids started displaying again, but now Feb 2021, they have stopped displaying again, even for older models that worked fine a few years ago.
  25. If you have multiple coverages for flow budget zones, then map a visible zone coverage to MODFLOW, when you run the USGS ZONEBUDGET tool it will pick up all zones, whether active or not, even if they overlap. This is much like the bug with grid activation coverages where all "activation" areas are mapped, including inactive coverages. The worst case is where you have zones with the same ID number in more than one coverage and there is no way to tell which is the "real" zone. Assuming you don't want to delete the alternative zone coverages, it can be fixed by de-selecting "Zone budget
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