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About Lalith

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  1. Lalith

    draining water to the ground using canals

    Thank you Sean. I will try this and let you know. Appreciate your prompt response.
  2. 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
  3. Lalith

    Different results from windows 7 and 10

    Can you please elaborate more? Is it a MODFLOW model? regular? USG? NWT?
  4. 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
  5. Did you complete these tutorials here in SEAWAT section? https://www.aquaveo.com/software/gms-learning-tutorials http://xmswiki.com/wiki/GMS:SEAWAT
  6. 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.
  7. 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
  8. Lalith


    Hi, I am working on a MODFLOW and MT3DMS simulation set up. I have some constituent observations at different locations. I would like to create a 3D constituent plume using these observed data and use that 3D plume as the initial condition for MT3DMS model simulation. I am able to make the 3D constituent plume using these observed data with 3D Geostatistic methods. However, I don't know how to map this 3D plume to the MT3DSM grid as the initial condition. Would you please explain this to me? Thank you, Lalith
  9. Lalith

    Curve Number

    Hi, I am trying to calculate curve number for a watershed using soil type and land use data. I am required to use watershed boundary, longest flowpath and drainage point shapefiles from another program. I also have GIS shapefile of soil type and land use. First I made the drainage coverage and projected watershed boundaries, longest flowpath and drainage point shapefiles. created the polygons and calculated basin data. Then I tried to calculate the CN using soil and landuse shapefiles. I used a land use table created by me using the soil and land use data. Please see the attached document for more details. However, my CN calculation provide me an empty output with the following message on it. Would you please help me figure this out. ================================================================================ Runoff Curve Number Report (Generated by WMS) ================================================================================ Fri Oct 20 13:43:33 2017 Thank you, Lalith
  10. Lalith

    CAD, layers and cross sections

    Hi, I have an inherited a GMS modflow model where properties of soils are defined as layers (not as solids). Each layer has several different zones (areas) with different soil characteristics, such as hydraulic conductivity. My client need few different types of outputs. Would you please let me know if they are possible? The required outputs are as follows. 1. Cross section (other than front and side views) showing layers only (not all model grids) and preferably color each zone of different soil types within each layer with different colors. 2. Can the output in 1 be exported to AutoCAD or ArcGIS in 3D? 3. Can the capture zone of each layer due to extraction well be separately output as shapefiles or AutoCAD in 3D? 4. Can the layer elevations be shown in front and side views? Thank you very much and I appreciate your responses and suggestions. Lalith
  11. Lalith

    Infiltration Gallery

    Hi, I have a GMS modflow model. I need to see how effective an infiltration gallery in this modeling domain. If you have modeled infiltration filters using GMS, would you please direct/help me on how to do that? Directing me to any study resources are also appreciated. Do we have any tutorial that would explain this? Thank you, Lalith
  12. Lalith

    MODPATH crashes

    This happened to me as well. My understanding is that this takes up lots of RAM if you create a large number of particles. I would start with total of 20 or 30 particles for entire simulation and increase gradually. That worked for me.
  13. Lalith

    mapping solids to a 3D grid

    Hi, I have built 3D solids using borehole data of quite complex geology. It has so many layers of soil types. However, I do not feel that I should assign layers for each soil type because it will make too many layers to analyze. Should I?. Also, some soil layers do not run across the entire domain. I was thinking these solids should be mapped to a 3D grid with three or four layers with similar hydrogeological characteristics. Can someone please guide me how I should map these data to a 3D grid modflow grid with few layers? Am I going in the proper direction in modeling this? Thank you, Lalith
  14. Hi, I have a multilayer (9 layers) GMS modflow model. I need to select cells within a rectangle area in only three layers (say layers 3,4, and 5) to run modpath and provide these loacations as starting locations for forward particle tracking. Would you please let me know how to do this? I also noticed that, selecting all the cells within the rectangle area also selects lots of cells and running forward tracking hangs the computer. Therefore, I made set of points spaced apart farther than cell dimensions so I can use the option "intersecting objects". Can I select intersecting cells of these points within the rectangle and within only 3 layers? Please let me know. I appreciate your help. Lalith