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Lalith

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About Lalith

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  1. Hi Sean, Thank you very much for your prompt response. Best regards, Lalith
  2. Hi All, This is more a fundamental GW question than modeling. Does MODFLOW steady state modeling use the Specific storage (S) in its groundwater flow calculations? I have an inherited steady state MODFLOW GW model where Specific storage (S) is left as 0 but model works. In the model, the hydraulic conductivity, longitudinal dispersivity, and porosity values are specified. Just trying to understand if the simulation results are correct. Your responses and suggestions are very much specified. Thank you, Lalith
  3. Please let me know how this works.
  4. Hi Ted, There are 3 approaches. 1. BC's are marked in red dots can also be specified along red lines. Model will try to better interpolate. the BC's. 2. You can go bit further in this approach as follows by specifying heads along contour lines (basically digitization). If your contour lines are in the form of either CAD or GIS shapefiles, then you can convert them to a line feature easily and specify them as Specified Heads (for All layers or selected layer range). You need to activate the layer range for that if you have multiple layers. 3. Go for MODFLOW-USG
  5. Hi Sakura, I didn't get a chance to read the forum in a while. Sean has given you all the correct advice. You are in good hands. In summary, I would try running the model and would not worry about the warning at this stage.
  6. Lalith

    Sarath

    http://gmstutorials-8.0.aquaveo.com/SEEP2D-SheetPile.pdf this is another similar approach
  7. http://gmstutorials-8.0.aquaveo.com/SEEP2D-SheetPile.pdf this is another similar approach
  8. Hi Sarath, My understanding about your actual condition is limited. With the understanding I grabed from your text, a simple rectilinear modflow model will do this. Diaphragm walls can be represented using a barrier with appropriate HC, (https://www.xmswiki.com/wiki/GMS:HFB_Package). I would start with single 2 layer model (1 above the excavation level and other one below that level). Best regards, Lalith
  9. Lalith

    Sarath

    Hi Sarath, My understanding about your actual condition is limited. With the understanding I grabed from your text, a simple rectilinear modflow model will do this. Diaphragm walls can be represented using a barrier with appropriate HC, (https://www.xmswiki.com/wiki/GMS:HFB_Package). I would start with single 2 layer model (1 above the excavation level and other one below that level). Best regards, Lalith
  10. Hi, Why are your horizons so much off from the solids? Where is your grid? is it completely inside your solids? Can you make only the solid edges and remove the solid faces and also add the grid with a different specified color. I would like to see both the grid and solids frames in the same figure. best, Lalith
  11. Please make the boundaries that are used to create solids little bit larger than the boundaries used to make the modflow grid so that solids would cover the grid sufficiently (make a buffer). Sometimes, grid cells are created that crosses out the boundaries (when using specified heads for example). If the same boundaries are used to create solids, then those solids do not cover these boundary cells and provide this error.
  12. Please make the boundaries that are used to create solids little bit larger than the boundaries used to make the modflow grid so that solids would cover the grid sufficiently (make a buffer). Sometimes, grid cells are created that crosses out the boundaries (when using specified heads for example). If the same boundaries are used to create solids, then those solids do not cover these boundary cells and provide this error.
  13. Please assign two coverages in your conceptual model. One for each set of layers that requires unique GH at the boundary. Assign "layer range" and head properties appropriately as shown below. Please also assign "Default Layer Range" at the bottom in each coverage as you need. For example, one general head boundary condition for the layers 2 to 5 can be assigned in the set up below. Multiple coverages like can be set up in the conceptual model as necessary.
  14. Than you Bri. That works. Wonderful solution.
  15. 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
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