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Kirk's Achievements


Newbie (1/14)



  1. Yes, start simple and carefully plan horizon numbering and sequencing.
  2. I have used stream flow routing package SFR2 in GMS to model canals. If stages in the canal are above the groundwater elevations they lose water, if canal stages are below the groundwater table, they gain water. Can work quite well, adjusting stream bed conductance to control gain/loss rates.
  3. Aquaveo technical support explained this to me: just enter a different parameter number for the conductance of each arc.
  4. I just created a two year model, with one extra leap year day, having 731 daily stress periods. We decided to use 4 time steps per SP to speed up the run, and it solved just fine with no major error. It has 5 municipal wells with detailed data, but entered as daily rates/stresses. Also had great meteorological data and instrumented monitoring wells in the area. All input was in a daily format. The model runs in about 6 minutes using MODFLOW 2000 in GMS.
  5. I have a functioning, relatively simple one-layer MODFLOW 2000 model with one river consisting of 22 arcs. I would in GMS to run PEST for streambed conductance for each arc, with the goal of matching the heads in observation wells. Is this possible? If so, how do I structure this in GMS?
  6. Thanks Alan. The model I am working with was created by a co-worker, so I am not exactly sure of the sequence of his steps. He seemed to imply that first he used the Solids to HUF command, and then the Solids to MODFLOW command, but with the HUF package selected as the flow package. In the resulting model, I can select a plan view and layer, and in the Display menu turn "cell faces" on. Now, I see four colors of cells, that match the four colors in the materials editor. It seems as though, then, each cell is simply one of the four assigned material HK values. Is that the fact then? If you care to have a look, a file was uploaded to aquaveo's file cloud, and my password to folder was assigned to me as aquaveoKW, uploaded April 19th (13 days ago). The file I uploaded is named ML12-15-16_R1_KW.zip.
  7. The GMS instructions show that using Solids to MODFLOW, Grid overlay with Keq you should get this custom K values assigned to cells, and in that section of there is this neat little image I embedded in this message. It seems like a GMS/MODFLOW user would like to be able to tell what K is actually assigned to each cell in a case like this. But, in GMS, using the HUF package, no K appears for cell-properties when right clicking a cell in the model. It says some parameters are in the Materials-editor. But, how can we see what the intermediate, customized K values are? One of our group noted that this image have used such data to have been created! So how did you get these values out of the model?? Is there some method or steps that I can use to say, export K for layer 4, for example? Thanks for any tips provided! Kirk
  8. Kirk

    ET surface

    A final note: Thanks for the assistance. I followed the steps provided by Alan, and found that the virtually the exact same elevations were reproduced in my MODFLOW ET package as using my copy and paste method. Nice demonstration of how well the software works with elevation datasets. I actually had saved the USGS NED dataset as 2D Scatter points, so just interpolated that product onto the 2D Grid. This worked great. Kirk
  9. Kirk

    ET surface

    Thanks for your detailed reply, Alan, I appreciate this. I will see if I can get that method to work. I am in a testing phase at the moment, working out my methodology for applying the ET in the model. Meanwhile, I just emailed Kyle at Aquaveo a solution that also seemed to work. Here is what I wrote Kyle: Well, I think I have succeeded in getting my elevations placed in the ET package. I simply went to MODFLOW – Global – Top in the Project explorer, and selected “properties.” I clicked on the upper left cell to “select all” of the array. I then opened MODFLOW – ET – ET Surface and again selected all, and used “paste.” It seems to have populated my ET array with surface elevations. That is what I had in mind, so I believe I am good-to-go. However, if you do find a better way to do it, why please let me know. Or, if what I did is not OK for some reason, please let me know that too. Alan, if you think my method might cause me problems, please let me know.
  10. Kirk

    ET surface

    Hi. I am attempting to apply the concepts Alan L. and Rob have brought up. One problem is that I do not know what a U-GRID is. Also, Alan your method sounds very straight forward. But can you possibly explain the steps a little more? How do I interpolate the ET surface to a matching 2D grid? I tried just selecting "grid" in the Project Explorer, and "Convert to" 2D grid, but no top elevation seemed to come into the 2D grid. I need more detailed instructions, but can always revert to entering them all manually. Meanwhile, Kyle with Aquaveo support sent me some instructions too. I'll call Kyle and see if perhaps he can walk me through the steps. Kirk W.
  11. Kirk

    ET surface

    Alan L., see also Rob Virtue's note below. Thanks Rob for sending this workaround, in case Alan's method seems problematic. Alan, indeed the 2D dataset to Array function is greyed out in my GMS application, as noted by Rob. I will try your approach, with the hope that if I have a 2D dataset created and turned on, then the function may be available (i.e. not greyed out). I'll give it a try. I have sent the files to Aquaveo technical support, maybe they will show me the same thing. Kirk
  12. Kirk

    ET surface

    Replying to my own topic here... Or is ET surface simply the top of layer one, and elevation of zero is related to that surface?
  13. Kirk

    ET surface

    I would like to set up ET for a surface defined by a tin (based on DEM), but when I create a coverage, it seems to just ask for "ET Elevation". Can I select a surface to set ET elevations for individual model cells within a larger polygon?
  14. Follow up Note: Todd at Aquaveo submitted this as a bug to the developers of GMS on 9/2-2011. Also he suggested a work around of using a high number of contour intervals with the number of contours option with Block Fill. Kirk
  15. In GMS 7.1.2 I could map my HK data by simply using the cell faces button and options dialogue box to specify "active data set" and "IBOUND" and then auto-compute would give me a nice varied display of HK. Even with somewhat unbalanced HK distributions. In GMS 8.0.8 and 8.0.9 (both) the cell faces options button is no longer there, and instead there is a block fill function in the contour options dialogue box. But the auto-compute will not generate a nice distribution that could be attained in GMS 7.1.2, and even when I specify values for specific HK numbers, I get several values of HK mapped as only one color - at least sometimes! Can anyone tell me how to work this new block fill to work like the old cell faces options worked??
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