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Everything posted by Hydrology

  1. I tried the PCGN solver and it was awesome to see it use 90% of my 24 cores. But, strangely the PCGN took 17 hours to run using all 24 cores, where the PCG solver only took 30 minutes to run basically using one core.
  2. Hi thanks for responding. I have the 64bit option and parallel option checked. I am using the PCG package. Has the PCG package not been parallized?
  3. I don't know if this should be under the MODFLOW directory, but I have been trying to see if I can speed up my GMS runs. I have a GMS MODFLOW model that is taking about an hour to run and I would like to shorten that run time. I see that I am using about 2.5% of my CPU utilization and I am running about 300 kB/s in disk access time, well below the capacity of the CPU or disk. I have a dual processore Xeon system with 12 cores for each processor running at 3.2GHz. My disk drive is 4-2TB M.2 NVME SSD's running in a Raid 0 array in a PCIe slot. The system has 256GB of RAM. This configu
  4. This is a little late for adding to this topic, but your path name is really long. Try shortening up your directory path name and see if that helps.
  5. I am setting a drain with a specific elevation in a MODFLOW run, but the final gw elevation for the cell that the drain is located in, is not the same as the elevation that I set for the drain. It seems to vary depending on the hydraulic conductivity that I set for the layer that the drain is in. For low layer conductivities, the final drain elevation in the cell is close to the elevation that i specified for the drain, but for higher layer conductivities, the gw elevation in the cell can be several feet higher than the specified drain elevation. How can I get the drain to force the elevati
  6. Wrong forum. Move your question to the WMS forum.
  7. I just recently started having a problem displaying the grid. I create the grid and it is visible, but as soon as I map it to Modflow, the grid within the model boundary dissapears. You can still see the grid outside the model boundary until you activate cells in coverage, then those grid lines as they should. I have played around with the display options in 3D Grid Data, but the cell edges will not display. I have this same problem on about 7 different GMS models. It seemed to just start about a week or two ago. Does anybody else have this problem, or know of a fix. I just figured out
  8. I think that the problem ended up being a conflict between GMS and our firewall "Comodo". GMS creates 5 or 6 batch files in the Temp directory every time you zoom or pan the display. It then executes the batch files sequentially to redraw the bitmap. Our firewall would send up a popup every time GMS executed one of those batch files because batch files can be a big security risk. These popups would often occur 300 to 500 times during a single GMS session. I tried turning the firewall off to avoid the warnings, and that is what caused GMS to stop displaying bitmapped graphics completely.
  9. The files are local, but are on a different drive than the model files. I will try moving them to the GMS model directory and see if that helps.
  10. I have been working with a GMS model with two TIFF files for background information. After several days of working correctly, the model stopped displaying the imagery. It always took a long time to display them, but after 30 sec to a minute they would display. I deleted the images and reopened them but GMS still does not diaplay them. I tried closing GMS and reopening it, but GMS will still not display them. Does anybody know what is causing this, or have a workaround?
  11. Here is the screen capture of the model crash.
  12. I have a weird problem. I have a transient model that runs fine if I set the Output Control to "Output at last time step of each stress period". But when I set Output Control to "Output At Every Time Step", the program immediately crashes when I try to run it. Has anybody run into this problem before? I have tried to attach a screen capture of the crash error, but the forum wont let me even though it is only 112KB. The MODFLOW output file just contains the first the few lines of the run header.
  13. Thanks Michal, I will experiment with that and see if that approach gives me what I need.
  14. Hi Bri, thanks for the response. I am familiar with the references that you indicated. I often use the specified head and head dependent flux boundaries. I havent used the specified flux boundary, but that is not what I am looking for. What I am trying to set up is a boundary condition that will allow free flow across the boundary without restriction, so that the flow across the boundary will vary in time, depending on the amount of water that i pump into or out of the model domain. I don't want to necessarily fix the head across the boundary either because I think that would overly const
  15. Is the default boundary condition in MODFLOW a no flow boundary? If so how would I create a boundary condition that allows flow, but has a fixed head at either end of the boundary?
  16. I thought that might be the case, thanks.
  17. Does a horizontal flow barrier block the entire layer based on what layers your barrier coverage is assigned to, or can you set the bottom elevation of the barrier by clicking on the attributes in map view and setting the bottom elevation in the Z column. I have not seen much on line that has given me a definitive answer. All of the descriptive drawings always show the whole layer being blocked by the barrier, but that may be just for simplicity.
  18. I will try to see if they can do this. Since this type of program behavior fits a classic malware attack profile, anyone running GMS has been banished to a trailer behind the office where there is no internet connection or connection to the server. So now we have no direct access to the project files on the server, and we are not allowed to put anything developed on this computer back on the server. We have never had this problem with previous versions of GMS, so I will see if we can go back to an older version of GMS. Below is a typical script from the batch files. REM -- Merg
  19. I have just upgraded to GMS 10.4 and I am having a compatibility issue with GMS and our Network security. Apparently with 10.4, whenever a graphics file, like an aerial photograph, is displayed, the program creates a temporary batch file that it executes and then erases. This happens for each aerial file you have in your project, and the batch files are created each time you pan or zoom your display. These batch files are considered security risks by our security software, and I get a pop-up asking me to allow/not allow the batch file to run each time I move my display. Each batch file has
  20. Are the pumping rates interpolated between time periods? I have pump totalizer data on irregular time steps and I am trying to make sure that I am representing them correctly in the pump time series. In the example below I show the date and the totalizer readings in (gals). I convert the total gals to an average gpm computed over the time period since the last reading, then to a ft3/day for input into modflow. Does modflow interpolate the flow between time steps, or does it use a specified flow rate for each time step until another one is specified (stepped pump rate). For example is the
  21. Is there a way that I can rotate the display so that north is not straight up? I have an existing model and I would like to rotate it around 45 degrees before I make an animation of groundwater drawdown due to pumping.
  22. Thanks, that is what I ended up doing after tech support pointed me in the right direction. So far it seems to be working, although the AVI files are coming up with different horz and vert values, so i can't combine them. I am going to try and generate them again, being vary careful not to change the plan view window in the GMS interface. I think that the AVI size is set by your window size, so if you change or move your GMS window, the video size changes.
  23. Hi, I am trying to make an animation of drawdown contours that spans several models. The first model is a transient run from Time-1 to Time-2 and reflects a specific model condition. I then duplicate that gms model and remove a barrier. I then run this second model in transient mode from Time-2 to Time-3. The starting gw level for the second model is set at the 3d surface of the last step from the first model. I can create animations for each of the two models and merge them together. This works fine for actual gw elevation contours, but it does not for drawdown contours, because th
  24. Sometime over the last few weeks the grid lines for the 3D grid in modflow have stopped being visible. I have been using GMS for many years and have never had this problem. They are visible when you create the grid, but become invisible once you map your model to MODFLOW. They are highlighted in the 3D grid options in the Display Menu, but are still not visible. This started happening on all our computers pretty much at the same time
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