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Lalith

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About Lalith

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  1. Lalith

    SEAWAT in Modflow-NWT

    Update about this situation. Aquaveo technical assistance confirmed that SEAWAT in GMS is compatible only for modflow2000. In modflow-NWT and modflow2005 there is a package for saline intrusion (SWI2 under additional packages) but its more 2D and is not as sophisticated as SEAWAT.
  2. Lalith

    SEAWAT in Modflow-NWT

    I set up a SEAWAT model for my model to account salt intrusion. My model is quite similar to the Aquaveo tutorial except I did not have an initial concentration and head values like in the tutorial. I used my steady state modflow heads as the initial heads and made up salt concentrations along coastline. However, my model runs very quickly and does not produce heads or concentrations and provides following message. Only difference in my model vs tutorial one is technically my model run in Modflow-NWT. Is this a problem? Would you please let me know? In addition my model has concentrations in mg/L (I set it up this way because there are other concentrations to be run in here later).
  3. Lalith

    Constituent across each cell face

    Hi Michael, Thank you for the tip. This is very helpful. I will update you with the progress. I kind of did similar thing to get the flux. Right click on .ccf file and separate them into data sets and one data set is the flow through the constant head BC. Since I know the concentration in each cell, I managed to get the flux across by multiply concentration by flow across. Thank you again for sharing knowledge. Lalith
  4. Lalith

    Constituent across each cell face

    Hi Michael, Thank you very much for showing the option. This "The package can also compute a mass flux associated with a group of MODFLOW boundary conditions." is the one I was looking for but I was not able to figure it out. Any other detail available on how to calculate flux across the BC conditions from each cell? Please let me know. Your suggestions will be very helpful. Thank you, Lalith
  5. Lalith

    Dual domain mass transport

    I also had this issue when I exported the desired data set. It did not export values properly. Probably, a bug in GMS. Just select the entire grid and all data sets. You will get the values. I know this is not the ideal way with lots of unnecessary data sets. You can report this to Aquaveo so that can fix it in their next version. For the moment, please go by all data sets for entire grid. Just a side though about way around this bug. Save your file as and delete all other unnecessary datasets that you do not want to export and now export entire grid and select all data sets (you have only your desired data set here). This is a way around.
  6. 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.
  7. 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
  8. 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"
  9. 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
  10. Lalith

    draining water to the ground using canals

    HI Kirk, Thank you very much. This is exactly I was looking for. Thank you, Lalith
  11. 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
  12. 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
  13. 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.
  14. Lalith

    draining water to the ground using canals

    Thank you Sean. I will try this and let you know. Appreciate your prompt response.
  15. 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
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