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Hydrology

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  1. Here is the screen capture of the model crash.
  2. 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.
  3. Thanks Michal, I will experiment with that and see if that approach gives me what I need.
  4. 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 constrain the model. Not applying a boundary condition to that part of the model will create a no-flow boundary condition, and that is what i am trying to avoid. Is there a way to achieve the condition that I am looking for?
  5. 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?
  6. I thought that might be the case, thanks.
  7. 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.
  8. 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 -- Merge images including a created background color image. REM -- Created a 1 pixel image with display extents. "c:\software\hydrologic\gms 10.4 64-bit\gdalbin\gdalwarp.exe" --config GDAL_DATA "c:\software\hydrologic\gms 10.4 64-bit\gdalbin" -of GTiff -dstalpha -te 6005738.0000000000000 2110135.0000000000000 6021445.0000000000000 2120129.0000000000000 -ts 1 1 "R:\Temp\GMS_19140\im00005_action1out.tif" -overwrite "R:\Temp\GMS_19140\im00031_image2out_image1merge1onePixel.tif" REM -- Give the 1 pixel image the background color. "c:\software\hydrologic\gms 10.4 64-bit\gdalbin\gdaldem.exe" --config GDAL_DATA "c:\software\hydrologic\gms 10.4 64-bit\gdalbin" color-relief "R:\Temp\GMS_19140\im00031_image2out_image1merge1onePixel.tif" "R:\Temp\GMS_19140\im00031_image2out.tif_image1merge2map.txt" "R:\Temp\GMS_19140\im00031_image2out_image1merge3Background.tif" REM -- Combine 1 or more images using current display view. "c:\software\hydrologic\gms 10.4 64-bit\gdalbin\gdalwarp.exe" --config GDAL_DATA "c:\software\hydrologic\gms 10.4 64-bit\gdalbin" -of GTiff -te 6005738.0000000000000 2110135.0000000000000 6021445.0000000000000 2120129.0000000000000 -ts 1614 1027 "R:\Temp\GMS_19140\im00031_image2out_image1merge3Background.tif" "R:\Temp\GMS_19140\im00005_action1out.tif" -overwrite "R:\Temp\GMS_19140\im00031_image2out.tif"
  9. 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 a different random name for each time the display is redrawn, so we cannot add an exception to our security software for the batch file. A typical name is C\Temp\GMS_21380\img00247_image2.out.bat. I have 9 aerial files in my project so I have to click OK on the security pop ups 100 or more times during a working session with GMS. Is there any way to have GMS not produce these batch files.
  10. 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 pump rate on 3/13/12 in the example below 0.00 ft3/day, or is it 77.33 ft3/day? I want to make sure that I get the mass balance for pumped volume correct. Date gals) (gpm) (ft3/day) 3/12/12 0.0 0.0 0.0 3/15/12 5,212.0 1.2 -232.3 3/16/12 8,674.0 2.4 -462.8 3/19/12 9,752.0 0.2 -48.0
  11. Thanks. I will try that.
  12. 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.
  13. 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.
  14. 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 the drawdown for model 2 starts at the starting gw for the second model, not the starting gw of the first model. It need to have the second model calculate the drawdown from the starting gw of the first model for the drawdown contours to be continuous between the two models. Is there any way to get the second model to use the first models starting gw elevation for the drawdown calculations. Any help would be appreciated.
  15. 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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