Jump to content
GMS, SMS, and WMS User Forum


  • Content Count

  • Joined

  • Last visited

Community Reputation

0 Neutral

About Lalith

  • Rank
    Senior Member

Recent Profile Visitors

1,416 profile views
  1. Lalith

    Dual domain mass transport

    Found it. Right click on the 3D grid and export it as a shapefile. Now, open the shapefile using ArcGIS and export the attribute table as a txt or csv file or database as you wish.
  2. Lalith

    Dual domain mass transport

    You may need to process data from .UCN files in the MT3DS folder. Please let me know if you have any success. https://water.usgs.gov/nrp/gwsoftware/modelviewer/ModelViewer.html
  3. Lalith

    Dual domain mass transport

    HI kpham89, You get concentrations at all cells at all times in the method Allen has described. I think you have confused the output method "from active dataset to values" with the method that Allen has mentioned. If you right click active dataset graph and select view values, then you only see values from ten cells. What Allen ask you to do is clicking on the active data set in MT3DS data set in the 3D grid, then right click, select view values, select output to text. I hope this is clear. I am, in fact, looking for bit more advanced output option than this. Please let me know if I can obtain the concentration fluxes though every face of cells. I put a more detailed request on this today in this form with the topic "Constituent across each cell face"
  4. Hi, I have successfully created a Modflow model and a MT3DS models and ran them to determine the groundwater flow field and constituent transport in the ground (figure blow is an example of a constituent plume). Model has 10 layers. This model domain is bounded by ocean from one side (red square). A separate hydrodynamic model is run for ocean currents and transport to determine the behavior of constituents that seeps to the ocean. My Modflow and MT3DS models are supposed to provide the constituent flux to the ocean (flow and constituent concentration). I would like to get the constituent flux from each of the model grid cells faces in the ocean side. Would you please let me know how to do this? Thank you, Lalith
  5. Lalith

    draining water to the ground using canals

    HI Kirk, Thank you very much. This is exactly I was looking for. Thank you, Lalith
  6. Lalith

    Initial conditions to MT3DMS

    Hi Sean. Thank you for the suggestion. I will try this and let you know how it goes. Thank you, Lalith
  7. Lalith

    Initial conditions to MT3DMS

    Hi, I have a set of measured Thiophenol concentration values. I can prepare a 3D plume of Thiophenol using 3D Geostatistics tool of GMS (in a 3D grid) in a new GMS project. However, I cannot make this 3D plume grid in an existing model set up that already has both modflow and MT3DMS models in the same region. When I prepare the plume as 3D Grid Data in the same model set up as in modflow and MT3DMS model, GMS requires to delete modflow and MT3DMS 3D grid. The reason why I want to prepare the 3D Thiophenol plume in the same set up as my modflow and MT3DMS model set is because I want to provide the above Thiophonol plume as the initial condition to the M3DMS model? How can I use “3D Data Set -> Grid…” option for this? Or, is my approach to this modeling initial conditions for MT3DMS correct? Please advise me? Any suggestion to resolve this situation is highly appreciated. Thank you, Lalith
  8. Lalith

    GMS crashing when trying to use MODPATH

    How many particles do you release? What is the grid resolution? Did you try this on simple grid model with few particles? Sometimes, complex grid and large number of particles cause this due to the lack of RAM and processing power.
  9. Lalith

    draining water to the ground using canals

    Thank you Sean. I will try this and let you know. Appreciate your prompt response.
  10. Hi All, I would like to check the effectiveness of using canals to draining water into the ground with the gravity (opposite of drain) without using injection well. How do I model this in GMS modflow? Please let me know your suggestions. Thank you, Lalith
  11. Lalith

    Different results from windows 7 and 10

    Can you please elaborate more? Is it a MODFLOW model? regular? USG? NWT?
  12. Lalith

    Well screens

    Hi Allan, I found a bug in modpath. I released particles from the cell faces (not on the water table surfaces). Then I deleted particle starting points that are above and below the screen levels. I just wanted to see the behavior of the particles released from screen levels. model worked fine. No problem. When I saved the model closed it and reopened it later, all particle paths are messed up. It looks like particle release locations are redistributed again on one side of the entire cell. Thank you, Lalith
  13. Did you complete these tutorials here in SEAWAT section? https://www.aquaveo.com/software/gms-learning-tutorials http://xmswiki.com/wiki/GMS:SEAWAT
  14. Lalith

    Well screens

    I use both of these options all the time. I have had no issue. If you do not specify the screen, extraction would be taken place from the layer ranges specified. If you specify the screen levels, it would be taken from the cells that intersect within the screen levels.
  15. If you have refinement on, please check your "bias". reduce that number. you can get rid of them. However that might results in a higher resolution grid, which might lead to higher computational times