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  2. Hi Jonathan, I was dealing with similar issue some time ago. There is not a satisfying way how to do it in GMS. The solution depends on the complexity of the task, but it involves grid level approach. You can isolate cells by material, select boundary cells by intersecting with boundary Arc (from Top view, Orto off) and adding a Sink/Source term. In some situtions it may be convenient to map BC form conceptual model to all layers and delete from grid where appropriate. This works if the boundaries do not overlap. Or you can modify the Package outside GMS with some script.
  3. I had been using WMS version 10.1. In that version, I was able to read in a .tiff file in the "GIS Data" folder in Project Explorer. From there I would right-click the file and select, "Convert to Land Use Grid". The program would then read it as a Grid file in the Map Data folder below Coverages. Now with WMS 11.0 version, I do not have the "Convert to Land Use Grid" or "Convert to Soil Type Grid" as options available in the menu after right-clicking on the .tiff file. I do have those options if I get Land Use data from the map server, but not if I export it from ArcMap as a .tif file. I made sure it was an 8-bit pixel depth file when loading into WMS GIS Data just as is the .tif file one would get from the Map Server. Is there a reason or a work-around? Can you fix this? It seems like a minor omission. Dan
  4. Last week
  5. Hello I have a project file which is related to 10 years ago and it was made with gms 3.5 (modflow 4.2) but when i try to open it it will fail to translate the modflow correctly So is there anyway that i can translate it correctly and run that model to check the results... Thanks for reading Regards
  6. Hey, I'm currently using the Conceptual Model Approach to assign General Head Values to my Modflow-Model. I have two main aquifers, separated by a confining unit and I want to assign different head values for each. Since my grid expands over about 500 cells in vertical direction every aquifer extends over several grid layers, but height is not consistent over the whole domain. Is there any approach like assigning head values to materials? Thank you a lot, Jonathan
  7. I've seen that be resolved before by using the "clean..." tool under the Feature Objects menu. Maybe you have some dangling arcs or other things that make it hard to read all the way through?
  8. Bri

    Modpath, Modflow-NWT

    No problem! I'm glad I could help.
  9. Than you Bri. That works. Wonderful solution.
  10. Bri

    Modpath, Modflow-NWT

    I did a little looking on the USGS website, and it looks like it MODPATH works with MODFLOW-NWT, but you need to set IPHDRY to a positive number in the UPW package. I got that info from here: https://water.usgs.gov/water-resources/software/MODPATH/UsingModpathWithModflow-NWT.txt
  11. Earlier
  12. Hi, I have a working Modflow-NWT steady state model. However, it does not trace capture zones using modpath. Error message states as: " RUN STOPPED because cell thickness is negative" Does modpath work with Modflow-NWT? Any help is appreciated. Thank you, Lalith
  13. Tamis

    scatter as lidar

    Is it possible to treat scatters with the lidar tools for classification and so ? i have the *.txt with points from a lidar flight, i want to use the classification tools to clean/eliminate high vegetation and buildings for example. Any contribution will be appreciate ... Regards! Tamis
  14. Hi there, When I want to map my conceptual model on UGrid (Unstructured Grid) , it works till 6% and then it shows the following error: "Boost. Geometry overlay invalid input exception" I stuck in this step and I need your precious help. Any points would be highly appreciated. Many thanks in advance for your time and help.
  15. Update - some confusion on the client's part. They were trying to install Arc Hydro which would require ArcGIS. Not sure if they have successfully installed GMS yet. Stand by... Ted I'm asking this question on behalf of a client - they are upgrading their GMS license to 10.4 (I believe that's the version - waiting for confirmation) with a single-user USB dongle. During the installation process of GMS, the installer asks for a ArcGIS license. They don't have one. What circumstances would require a license to ArcGIS? Is there a work around? Thanks Ted
  16. Hello! I'm running precipitation data every 10 min in a small watershed, using SCS Curve Number, Clark Unit hydrograph and Recession methods. When I'm trying to distribute the 10 min data in hourly data, I notice that the peak flow of the flow hydrograph is a little reduced. But trying to distribute the 10 min data to 5 min data, I find that both hydrographs are the same. Is there a threshold in the time step of precipitation data that Hec-HMS produces the same results?
  17. Hi all, New user to TUFLOW/SMS trying to overcome this issue (pictured). When importing a 2dm mesh data (created from TUFLOW Tutorial 06) which featured a 1d solution area along the river and a 2d solution area at the floodplains, I have observed that the Z elevation values of the 1D area is positioned above the 2D area. This does not affect the viewing of results in plan view but I am curious if there would be a way to properly align the two areas so that results viewing would be realistic in 3D view. Thank you very much, Tyson
  18. Thanks Michal, I will experiment with that and see if that approach gives me what I need.
  19. Hi Rachel, The problem is probably that the concentration observation file is not generated after your model finishes. Therefore PEST complains that it cannot find it. The reasons for this could be many. I suggest you to study how model equivalent concentration observations are generated with VM. Alternatively, you could do it manualy with MOD2OBS program from PEST utility suit for instance. When not sure what to do, read PEST manual.
  20. Hi, I think that what you describe could be achieved by general head boundary. Without specifying head at the boundary modflow cannot calculate groundwater gradient between the cell and the external region. So I think the problem is unsolvable the way you try to aproach it. I suggest using GHB package. If you have no information about heads outside the model domain, you could for instace specify GHB head the same as some initial model result head and together with lower conductance the head in the boundary condition cells will vary based on pumping/injection in the model domain. For higher conductance values the boundary will resemble constant head boundary while for lower values it will act more as no flow BC. The key is to find the right value which could be achieved through parameter estimation process.
  21. Hi Bri, thanks for the response. I am familiar with the references that you indicated. I often use the specified head and head dependent flux boundaries. I havent used the specified flux boundary, but that is not what I am looking for. What I am trying to set up is a boundary condition that will allow free flow across the boundary without restriction, so that the flow across the boundary will vary in time, depending on the amount of water that i pump into or out of the model domain. I don't want to necessarily fix the head across the boundary either because I think that would overly constrain the model. Not applying a boundary condition to that part of the model will create a no-flow boundary condition, and that is what i am trying to avoid. Is there a way to achieve the condition that I am looking for?
  22. If you just need a list of areas, one thing you can try is to choose File | Save As..., then under "Save as Type" choose "Attribute Files." That'll save a .txt file that has the area for all your basins. I hope that helps!
  23. The Online Guide to MODFLOW has a page about boundary conditions here. In short, there are three different boundary condition types, including a specified head boundary condition. You can look at the GMS Tutorials page for advice on how to set up your boundary conditions, especially in the tutorials labelled "MODFLOW - Conceptual Model Approach." I hope this helps!
  24. You may want to email this directly to technical support. They can be reached at support@aquaveo.com.
  25. If he goes into MODFLOW -> Global Options, he can find a checkbox labelled "Save native text copy." If he checks that and then runs MODFLOW again, he should get the native files in the MODFLOW_text folder associated with the project. Hope that helps!
  26. Thank you Chris24 for your support. May someone from the staff respond to this question, please?
  27. Is the default boundary condition in MODFLOW a no flow boundary? If so how would I create a boundary condition that allows flow, but has a fixed head at either end of the boundary?
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