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  1. Yesterday
  2. Anyone? Please let me know if I can clarify the question or provide any additional information.
  3. Hi, I have the same problem. My MODFLOW-USG model is running with certain horizontal and vertical hydraulic conductivity values. However, if I changed the horizontal and vertical K, the model wont converge as a results of dry cells. I am using '(1) Newton with Delta-Bar-Delta' with layer types of 'Convertible' in the LPF Package options (the model wont converge by selecting the 'Convertible Upstream' option). I also using the latest version of MODFLOW. Any advice is greatly appreciated.
  4. Last week
  5. I think you may be right about the XML not necessarily making a good mesh. I'm having success bringing in some breaklines from Civil 3D into the mesh converage for the roadway, then generating the mesh using the XML Scatter. As long as the breakines are not too close together I'm finding. I'm getting good road crown definition and contouring now. Thanks!
  6. I'm creating a fairly simple SRH-2D model simulation with a small inflow hydrograph and Exit-normal flow for boundary conditions. I am right-clicking on the Scatter that came from the XML and Convert>Scatter->2D Mesh. Then I don't have an option to link that mesh to the simulation... Only meshes created from mesh generation coverages have I been able to link to simulations.
  7. Could be a couple things. What type of model are you running? Is that the type of mesh you created? You might need to change the mesh to be used in that type of model, that is my initial guess. You could also convert the scatter to a map coverage and set that to mesh gen type. That could be one work around. There could be other ways, but you need to provide more information. Also, Your XML file might not make a very good numerical model mesh.
  8. I can't seem to be able to link a 2D Mesh that was directly converted from a Scatter (right-click) to a Simulation. I can only seem to link a 2D Mesh that is created from a Mesh Generator coverage. Is there anyway to get the mesh created directly from the Scatter to link up to a Simulation? The Scatter is from a XML file created from Civil 3D, and duplicates exactly the Civil 3D triangulation of the road surfaces... The mesh from the Mesh Generator does not. If we can't link a mesh that was directly converted from a Scatter, what would be the purpose of the directly converted mesh?
  9. Earlier
  10. I am wondering if there is a way to get the porosity in the material properties to transfer over to the MODPATH porosity array. My model is somewhat non-linear so I have to use NWT with upstream weighting and i created the model with solids created from rasters created in EVS so i don't have coverages to do a Map->Modpath command. Any help is appreciated.
  11. This says the breaklines are going to a Scatter... Is there a way to have the Shapefile breaklines go to a Mesh, so that the Mesh triangulation is triangulated along the breaklines?
  12. I can create a nice looking mesh with contours by right-clicking on this project's GEOTIFF file and simply converting to a 2D Mesh, however when I go through the Mesh Generator in order to create an "unobstructed mesh" for simulation using a large four sided polygon to capture my site area, and using the scatter set created from the GEOTIFF, the Mesh Generator only creates one diagonal triangle edge across the polygon for the mesh. What could I be doing incorrectly here?
  13. Hi, I still have the same problem but with another model this time. The problem happens when I add additional parameters for the PEST-estimation. No difference between a PEST calibration with SVD or SVD-assist. Any ideas on how to solve this issue would be appreciated. I run GMS 10.3.5. Jonas
  14. my error occurs in WMS 10.1 I try to save my wms file and I get this error: Error writing DEM data to XMDF.
  15. Hi, I have the same issue to define the bottom elevation of drains (the TIN and Raster aren’t good to define the drain elevation). When I map the drain coverage to MODFLOW, drain elevations always place below the cell bottom elevation. I have a set of drains defined with arcs in layer 1 (top layer) and with polygons in layer 3. I am using the MODFLOW USG and unstructured grid (UGrid). I tried the 'Seepage Face' instead of 'Drain'. However, I am getting this error: “The seepage face type requires a stacked grid. It requires a UGrid with horizontally identical layer (IVSD=-1).” Does anyone know how to solve this issue?
  16. Please try removing the porosity from your equation. Probably, the model calculates the Darcys Velocity , which is simply equals to Q / saturated_area.
  17. Are you using the internal culvert method or HY-8?
  18. Try breaking up your polygons into smaller ones.
  19. Hi fellas, i'm facing the same problem right now and reducing the number of vertices of my Materials polygonisn't working.. Any other suggestion?
  20. Has anyone had an issue saving and running multiple MT3DMS sims inside one gpr file by unchecking the default "save all files in subfolders" and instead assigning a unique *.mts name to each sim? When I close out and reopen the gpr sometimes the MT3DMS solutions all look the same, so maybe I am getting some solution file overwriting. I have checked the directory and all the input & output files are there with different time stamps and the mts file lists the input files correctly. I don't see why this wont work but any insight on the pitfalls of this method or specific instructions are welcome.
  21. Dear GMS users and experts, I am doing my groundwater flow simulation using Aquaveo GMS 10.4.6 version. Do you have any experience in doing calibration and uncertainty analysis by using GMS model? Could you please share some tutorials or examples? Thank you very much for your help, Best regards, Sakura,
  22. It may be easier to merge the mesh coverages, then mesh them. To do that, in the project explorer window, click on one of the mesh map coverages you want to merge. Hold the control button, and click on the other mesh/meshes coverages. Then, right click and select merge. This may be the problem you are having with the meshes (not having 2 selected). Make sure you have more than one selected (use the same procedure as above) to merge. Let me know if this helps or not.
  23. Tamis

    Merge Meshes

    I've been trying to merge two meshes just like it says in the help: https://www.xmswiki.com/wiki/SMS:Merge_2D_Meshes However, when i make right click, doesn't happened anything. is some kind of problem with the tool, or another way to merge meshes? Thanks! Tamara
  24. arto

    Modflow - modpath

    I have a one grid layer steady state modflow model in gms 10 . When I put one particle at a distance of 100 meters away from the intake well, it entered the well in 70 days with default porosity value of 0.3. Material K value is 0.002 m/s. Then I changed the porosity value to value 0.01 and after running modflow again, GMS informs that particle enters the well in two and a half days. I"m "confused", when there is less amount of effective pores available for ground water to move then GMS tells that water moves faster (from one place to other) ?
  25. Hi Fadoua, Please read the following document Chapter 11, Snowmelt of Part 630 Hydrology in National Engineering Handbook. It includes two formulas for snow melt, when raining and when no raining. Regards Rashid
  26. Hi Fadoua, Please read the following document Chapter 11, Snowmelt of Part 630 Hydrology in National Engineering Handbook. It includes two formulas for snow melt, when raining and when no raining. Regards Rashid
  27. Hi Fadoua, Please read the following document Chapter 11, Snowmelt of Part 630 Hydrology in National Engineering Handbook. It includes two formulas for snow melt, when raining and when no raining. Regards Rashid
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