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Found 6 results

  1. cansudemir

    Transient PEST Run with Pilot Points

    Hello dear users and the developers, I am having a problem with Transient PEST calibration (GMS version 10.2.3). My model consists of 1 layer UGrid and have boundary conditions of specified head (along the coast, 0) and GHB. I have done several PEST runs with 90 pilot points in steady state condition. It worked and got results. In the calibration window, it was showing the flow of parameters changing, the graph was being drawn. Then, I changed it to 7 years long transient model. The forward transient run with MODFLOW-USG was successfully done. But when it comes to transient PEST calibration with 90 pilot points, there is nothing going on in the window. No parameters showing up, just the time passes and it says parameter estimation finished. But no results. When I close it with "read the solution", it gives an error saying that: boost::filesystem::remove: The process cannot access the file because it is being used by another process: "C:\Users\user\AppData\Local\Temp\GMS_10980\ppest\slave1\GMS FILE NAME.ba6" During the Parallel PEST run, several cmd.exe are working besides pslave.exe. In the cmd.exe, there is something written by the developer: "Note: This program reads a MODFLOW-USG unformatted file. Sometimes there are problems in reading files of this type due to incompatibilities between different FORTRAN compliers. If there are any such problems please contact ... and I will send you an alternative copy of this program." Can this be the problem of mine in my case? Should I contact the person to ask for the alternative copy? Or what do you recommend? Thank you! Best, Cansu
  2. Hello, I have encountered a problem with exporting native modflow files from GMS. Some of the model parameters are defined using Pilot points. Lets say that I would like to use different version of MODFLOW to calibrate the model. I have succesfully exported the MODFLOW native files and I was able to start USGS version of modflow. The input data are read correctly, first stress period is solved, however during the second period MODFLOW stops. Here is the end of the output file: PERCENT DISCREPANCY = -0.03 PERCENT DISCREPANCY = -0.03 TIME SUMMARY AT END OF TIME STEP 1 IN STRESS PERIOD 1 SECONDS MINUTES HOURS DAYS YEARS ----------------------------------------------------------- TIME STEP LENGTH 2.67840E+06 44640. 744.00 31.000 8.48734E-02 STRESS PERIOD TIME 2.67840E+06 44640. 744.00 31.000 8.48734E-02 TOTAL TIME 2.67840E+06 44640. 744.00 31.000 8.48734E-02 1 1 STRESS PERIOD NO. 2, LENGTH = 29.00000 ----------------------------------------------- NUMBER OF TIME STEPS = 1 MULTIPLIER FOR DELT = 1.000 INITIAL TIME STEP SIZE = 29.00000 PARAMETER "sc1v1 " IN PARAMETER INPUT FILE HAS NOT BEEN DEFINED -- STOP EXECUTION PARAMETER "sc1v2 " IN PARAMETER INPUT FILE HAS NOT BEEN DEFINED -- STOP EXECUTION PARAMETER "sc1v3 " IN PARAMETER INPUT FILE HAS NOT BEEN DEFINED -- STOP EXECUTION PARAMETER "sc1v4 " IN PARAMETER INPUT FILE HAS NOT BEEN DEFINED -- STOP EXECUTION .... PARAMETER "GHB_3405 " IN PARAMETER INPUT FILE HAS NOT BEEN DEFINED -- STOP EXECUTION PARAMETER "GHB_3409 " IN PARAMETER INPUT FILE HAS NOT BEEN DEFINED -- STOP EXECUTION PARAMETER "GHB_3406 " IN PARAMETER INPUT FILE HAS NOT BEEN DEFINED -- STOP EXECUTION When modflow starts no interpolation is performed for the pilot points. I assume there is some custom routine in the GMS version that handles the interpolation from PP to the MF grid array. Please advice how this is supposed to be handled or what am I doing wrong.
  3. I have problems running PEST NSMC with fixed pilot points. Both in my own model and in the NSMC tutorial files, I get the same error message "Cannot open parameter value file nsmcII_200_random_nul.par." and the simulation finishes without completing any iteration. Is this a bug i in GMS? Kind regards, Jonas
  4. Jonas

    PEST and Kriging

    Hi, When i customize the variogram for the pilot points of the HK-field in the nsmc I and II tutorials, and also in my own models, I encounter the problem showed in the attached figure. It seems like the whole field is generated from only one point and not all available ones. I also edited the already set up variogram in the tutorials, and then changed back to its original form and still got the same problem. Any ideas on how to solve this issue? Kind regards, Jonas
  5. Hi! I have set up a model for a municipal water supply in an glacifluvial esker. I want to calibrate the hydraulic conductivity (HK) against steady-state heads in the esker material with PEST and pilot points. I also have other materials in the model but with a fixed HK. The recharge is also calibrated with PEST in three different polygons. The picture below shows layer four (of five). Left shows materials (only bedrock and esker in this layer) together with locations of the pilot points. The middle part shows calibrated heads after PEST has been running. Right shows HK after calibration with PEST. My issue is that the area with esker material (left) does not overlap the area that is calibrated with pilot points in the rightmost picture (non red area). Something that looks strange in particular is the straight paths from the middle to the south of the model that get the same HK as the bedrock although the material is set to esker. It is the same issue in the other layers of the model. Ideas on how to solve this issue are appreciated. Kind regards, Jonas
  6. I am running a model and refined it using the pilot points and am using the HUF package rather than the LPF package as suggested in the tutorial. I am trying to import the optimum values back to the model and do not see a way to attach them to the associated material. I have tried running the model after importing the optimal values and I again get my initial huge errors as the pilot points were never imported. If you have any advice on how to import these values it would be much appreciated. Version is 10.0.11 Greg
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