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  1. Today
  2. Is Coastal Modeling System (CMS) have the option to simulate cohesive sediments or it is only for non-cohesive sediments?
  3. Yesterday
  4. Hello! I use the Hec-GeoHMS 10.1 extension in ArcGIS 10.1. After merging 65 subbasins into one basin, I'm trying to river merge all individual streams unsuccessfully. The message from the above action is: disconnected rivers or rivers meeting at confluence can not be merged. I notice that all individual streams are meeting at a confluence. I would like to ask if I'm doing something wrong or if there is an alternative methodology in order to merge all rivers in one.
  5. Last week
  6. Dear Sean Czarniecki, Thank you very much for your kind reply. If these warnings do not influence the accuracy of modeling results I will go to the next steps. Kind regards, An,
  7. The only ways you can fix this is to either add more layers or change the thickness of your layers.....neither of which you probably want to do. If you read up on MODFLOW, you will see that it prefers if you don't make big transitions, but it will still be okay if you have them. We often have a thin confining layer (e.g., 1 m thick) above a thicker layer. For that warning to go away, you would have to make the next layer below no greater than 1.5 m thick, then another below that no greater than 2.25 m thick.....etc. You can see that this is often not practical. I suggest you don't worry about that warning. Other people may feel differently.
  8. Dear Sean Czarniecki, Thank you very much for your kind reply. I would like to fix the Warning: Cell dimensions change more than 50% between cells i=1, j=1, k=3, and i=1, j=1, k=4. Could you please give a solution to fix it? Kind regards, An,
  9. Warnings are not always a problem. The Cell Dimensions warning is telling you that the model results will be better if you have a smoother transition from smaller cells to larger cells (this will often come up based on layer thickness differences). The model will still work - this isn't usually a big concern. The second set of warnings is pretty clear - you need to establish hydraulic conductivities in layers 4 through 8....check your materials. You can also make these changes in other ways by opening the LPF package and editing layers individually, or by making coverages for each layer.
  10. Dear Lalith, Thank you very much for your reply. I solved the problem but I got other errors as the attached figure. Would you please give me advise on solving these errors? Kind regards, An,
  11. When using Modflow NWT and the UZF package and MT3DUSGS the following bug is present in GMS 10.3.7: Specifying the source concentrations in Constant Head cells and NOT as Recharge Concentration The parameters INCUZF and INCUWET (Items 7 and 9 in the input manual for sum package in Mt3DUSGS) must be specified in the SSM package for each recharge period as negative numbers otherwise as it is MT3DUSGS crashes because when they are missing it expects to read recharge concentration Here is a zip file of the model in which the correct sum package has been renamed sim.good and the one resulting from the file save in GMS is named ssm To fix this as GMS is now, one has to map the conceptual model to MT3dUSGS, save the model, manually add the two records for each stress period and run without saving
  12. Earlier
  13. Lalith

    Sarath

    http://gmstutorials-8.0.aquaveo.com/SEEP2D-SheetPile.pdf this is another similar approach
  14. http://gmstutorials-8.0.aquaveo.com/SEEP2D-SheetPile.pdf this is another similar approach
  15. 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
  16. 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
  17. 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
  18. Sarath

    Sarath

    Hello, I am trying to model a support of excavation (SOE) with diaphragm walls along the perimeter of the site and install wells for dewatering within the site. We would like to see the drawdown curves inside and outside the site. Can anyone please give me a direction on this? We don't have a toe cut-off. Thanks
  19. Global Options (among nearly everything else as well) is dimmed. I am trying to export a "Native Text" MODFLOW model. Any solution to this problem.
  20. Dear Lalith, Thank you very much for your help. Unfortunately, I cannot solve this problem. You can see in the Figure after extending the boundary of the study area the Model created another error. Could you or everybody please help me to solve it. If you don't mind I could send my model to your email then you could check it easily. Again, thank you very much for your great help. Yours sincerely, An,
  21. Thanks aghamiri, I can't find any thing helpful!
  22. Thanks Bri, I am using version 10.1.11.
  23. 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.
  24. 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.
  25. 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.
  26. Hello Everyone, I am trying to use GMS to model a dewatering system within in excavation which has cut-off walls on all the sides. I am very new to this software. Can anyone direct me to the right track here? Thanks a lot!
  27. Dear GMS' users, I tried to construct a Modflow model from solid data using hydrogeological boreholes data. Unfortunately, I got an error like the attached figure. Could anyone have any solutions please help me. Thank you very much, Sakura,
  28. Hi everyone! I use the Hec-GeoHMS 10.1 tool in ArcGIS 10.1. I merged all subbasins into one basin, but trying to river merge all individual streams, I encountered problems. The message from the above action is: disconnected rivers or rivers meeting at confluence can not be merged. I would like to ask if there is an alternative methodology in order to merge them all in one. Thank you in advance.
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