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  1. I have been trying to create a groundwater contour animation in GMS. It seems to work well for short duration timeseries of 300 stress periods, but when I try to create an animation of 3,000 stress periods, the animation seems to be created properly in GMS, but when I play the video, it is all scrambled and garbled. Is there a limit to the number of stress periods that you can use to create an animation?
  2. Dear all, I am trying to model a “subsurface dam” using the Horizontal Flow Barrier (HFB) package which simulates thin low-permeability geologic features to impede the horizontal flow of groundwater. I have a model with two alluvium layers which are shown in the attached schematic figure. In the HFB package, the cell boundary represents a vertical face between two adjacent cells. The question here is how I can define a barrier within one cell (layer) up to a specific level rather than the whole cell thickness (like layer 1 in the figure). Your help and insight would be hig
  3. Dear all I have trouble modeling a square site with different BC. at one side I have river (I put constant head as BC) and no problem in that for modeling. now, 1) at one side I have rock (no flow coming in or out from site at this side) and 2) at other side of square area I have no BC (I mean the water can flow out of area etc) what is the difference in modeling number 1 and 2? how to difine them in my model? my model currently have active cells in coverage so I think it means all sides I have rock, right? Thank you, Zara
  4. We are about to start a 3D dam seepage model. We have done several similar models over the last few years in a finite element, unstructured mesh model code similar to FEMWATER. This time, we've decided to start with a MODFLOW model due to funding and scheduling issues. I've been wondering if a MODFLOW-USG model will meet our needs, and eliminate the need to switch to an FEM model sometime in the future. I took a MODFLOW-USG class several years ago, and have been looking for an opportunity to use it, but have not stayed up to date with the current condition of the interface in GMS. I've do
  5. Hi there, When I want to map my conceptual model on UGrid (Unstructured Grid) , it works till 6% and then it shows the following error: "Boost. Geometry overlay invalid input exception" I stuck in this step and I need your precious help. Any points would be highly appreciated. Many thanks in advance for your time and help.
  6. Hello Dear Alan and GMS Users, I’ve prepared boreholes, cross section and stratigraphy solids using GMS Version 10.4. I created first 2D Quadtree UGrid and then I selected Horizons -> UGrid from Borehole menu to map Horizons (Solids) to the 3D UGrid (Quadtree). I faced the following error and I cannot figure out how I can solve the problem: “No dataset defined for scatter set Horizons. Cannot continue” Your prompt help and response would be highly appreciated.
  7. hi everybody, How do link GMS and Matlab software? can you give me any instruction for this, please? This case is very much emergency for me, It will be very helpful if you can share your experiences or suggestions. It will be very much appreciated.All the best,
  8. hi everybody, How do link GMS and Matlab software? can you give me any instruction for this, please? This case is very much emergency for me, It will be very helpful if you can share your experiences or suggestions. It will be very much appreciated. All the best,
  9. I set up a new color ramp for contouring. I want to show drawdown values: blue for positive values, red for negative values and white to zero value. Is it possible to assign no color to the zero values so that I can see the raster map under the contouring layer? My workaround was to save GMS project to image file, open it in Quantum GIS and set the transparent color to white. Thank you Daniele
  10. Hey all! I have a question regarding boundary condition set up. I am working on a regional model of an large aquifer field which is used for drinking water purposes. Hydrologic and hydrogeologic conditions are at this stage of the research verry clear. We are dealing with open aquifer field where boundary condition is representing inflow to the aquifer from surrounding sedimentary formations. We have calculated the infow using National groundwater recharge model and at this stage we have data of infow (Q [m^3/s]) for every cell of the boundary condition. Is it possible to calculate t
  11. GMS 10.3 has been Updated! The 64-bit full installation can be downloaded here. The Tutorials can be found here. Bug fixes can be found here.
  12. Hi everybody, Both of groundwater modeling system(GMS) and surface water modeling system(SMS) are well known. Is it possible link them to evaluate flow exchange and pollution transport in river-aquifer interactions? Thank you for even the slightest mention about this. Azade
  13. GMS 10.3 has been Released/Updated! The 64-bit full installation can be downloaded here. The Tutorials can be found here. Bug fixes can be found here.
  14. Hi all, A bit of a simple question but I can't find the answer anywhere in the help files. I've been provided with some ARCGIS TIN's (.adf files within the TIN folder) and I'm struggling to import them into GMS. Is there a conversion that must be completed before this will work or am I missing something really simple as GMS just spits out errors at present. Thanks in advance M
  15. Hello, I am struggling with exporting the river coverage to shapefile - mainly I want to export the nodes with its ID and the head stages to shapefile I do it in standard way: Export Coverage - and choosing the .shp extension. Then I can export arcs and point file (polygon no as my coverage doesnt contain any polygons). The shp with arcs is exported without any problem, but what I am mainly interested is the shapefile with points. That is created but it doesn' t contain any data. (it contains just the names of attributes, but under that novalue). Is there any problem? Accord
  16. Currently you can not get cell to cell flow budgets with MODFLOW-USG. This is a feature that can really help troubleshoot problems and analyze if the model is behaving correctly. Any plans in providing this in MODFLOW-USG?
  17. GMS 10.2 Has been Released!The 64-bit full installation can be downloaded here.The Tutorials can be found here.Bug fixes can be found here.
  18. Hi everyone, I am currently doing a project regarding in-situ chemical oxidation of BTEX using persulfate solution, and trying to use RT3D to represent the process. As reading the literature the reaction should be a pseudo 1st-order kinetic reaction model, but the only relevant option I found in the reaction package is the inst. aerobic degradation of BTEX which only offers oxygen as the electron acceptor. In this case, could someone familiar with the persulfate or other similar oxidation mechanisms tell how to construct the RT3D model? convert the persulfate concentration to
  19. It would be great if you could add a feature to save the locations of your toolbars. If this is already a feature then please let me know the steps to save them. Thank you - Greg
  20. Hi all, I have come up with some errors when running the tute model of TUTE: MODFLOW – Generating Data from Solids that indicate “changing heads are below the bottom of cell xxx". It is so weird that a tute brings up a problem like this. Having read a thread in the forum suggesting to remove the BC of constant heads from the sources sinks coverage, I found many cells dry out with red triangular flags after a modflow run. I knew it was different from what is instructed in the tute sheet, but it seems plausible for me that without those BC these cells could dry out. A further question
  21. GMS 10.1 Has been Updated!The 32-bit full installation can be downloaded here.The 64-bit full installation can be downloaded here.The Tutorials can be found here.Bug fixes can be found here.
  22. Just came up with a question regarding where to apply different solution schemes for the advection package activated in the MT3D or RT3D model, and the cases are based on the tutorials 1. Can someone please explain further why we choose the Standard finite difference method for both the Sequential anaerobic degradation and BTEX degradation with multiple electron acceptors, MMOC for the Rate-limited sorption reaction, MOC for both Instantaneous aerobic degradation and Double-Monod model, 3rd order TVD (ULTIMATE) for all MT3D tutorial cases, etc. If there were relevant recommended rea
  23. I am a junior learner running through the general tutorials of MODFLOW, GMS and have come up with some confusion relating to the steps. 1. What happen to the right part of zone 3 with a constant recharge rate when importing csv file automatically matching zone name? The other zones are assigned correctly except for this part of zone 3. 2. In the tutorial it states the stress periods should match three changing point of recharge rate, i.e. 1/1/1986, 1/3/1986, 1/7/1986 (actually it is four including 1/10/1986). What is the purpose to set 1/5/1986, 1/6/1986 and 1/9/19
  24. Hi, I've been trying to calibrate my transient model using PEST, however I'm experiencing some difficulties. It executes the estimation process and finishes the parameter estimation but it fail's to give me any new values for the chosen parameters. This only happens when I try to calibrate it as a transient model. When I run it in steady state there are no problems and it estimates new values for my parameters. When I run it as a transient model there is a message in the PSLAVES windows that pops which states that the "Total sum of squared, weighted residuals: NaN", and I think the
  25. Hello all, We do have a license for Modflow-Surfact which I tried to use through GMS by running it as a third-partly executable but with no luck. No outputs were generated. Does any one has experience with running Modflow-Surfact with GMS? Thanks Mahmoud
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