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Found 53 results

  1. 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.
  2. Importing TIN's (ARCMAP .adf) into GMS

    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
  3. 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? According to gms wiki, should be possible to export head stages of rivers. My aim is to export GMS ID of nodes of the coverage (to have the information of X, Y coordinate and GMS ID), so I thought exporting to shapefile would be the easiest way. Is there any other possibility how to export ID of the Nodes with its XY coordinates from coverage to some format that can be then easilly processed (e.g excel,?) Thank you for any advice (I am using GMS 10.1.05) Petra
  4. 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?
  5. GMS 10.2 Has been Released!

    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.
  6. 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 an equivalent oxygen concentration? or should I try more options other than MODFLOW? Regards Dylan
  7. 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
  8. 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 is, i was constructing a more complex multi-layer solids model and tried to convert to modflow. My BCs are constant heads set on the arc of the coverage boundary, kind of surrounding my small catchment of interest, and they are definitely all below the bottom of my first, second and part of the third layer, so how to define the default layer range? (i.e. from 1 to 1, 3 to 12 as I have 12 layers in total, or 1 to 12?). PS: in this coverage I define wells, specific head, layer range for source sink and layer range for areal properties, and tick used for BC option. The first trial I have set was 1 to 12 (dont know if appropriate), converted map to modflow, and could see the blue dots assigned from layer1 to 12 of my conceptual model. All of them indicate the some heads I define in the coverage. (Really? Does it have to be a 58 m head in the even very bottom of my rock layer of 30 m elevation?). As expected, the model warned that lots of heads were below cells' bottom. When removing all of them in sources sinks and running the model in steady state, I found it never converge. A feeling was that I did it wrong when defining BCs. This is where I got confused. Could anyone kindly help? I am using GMS Version 10.0 Thanks for any help Rgds Dylan
  9. GMS 10.1 Has Been Updated!

    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.
  10. 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 reading resources, that would be greater. 2. In the Rate-limited sorption reaction tute, what is the meaning of changing Max. number of cells any particle will be allowed to move per transport step to 2 in the Particle dialog of the Advection package? 3. How to save multiple solutions as a .rts file like what it supposed to import in the Rate-limited sorption reaction tute. Because each time I ran the model it would overwrite the existing solution with a new solution of both Aqueous and Soil given a certain mass transfer coefficient. How to come up with a solution with different runs (i.e. different mass transfer coef in one solution file? Thanks, Dylan
  11. 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 1/9/1986 etc. since no change takes place at these time? In addition, this should assume all the recharge polygons have the same changing points of rate over the space, so what if we have different change in time of these zones, say 1/3/1986 for zone 2 and 1/4/1986 for zone 3 etc. How to set stress periods for this scenario?
  12. Transient calibration using PEST

    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 problems lies here. However I'm not sure how to fix it. If anyone has any idea what's causing this and could help me with a solution I would be very grateful. Jonas
  13. 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
  14. GMS 10.1 Has Been Updated

    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.
  15. GMS 10.1 Has been Updated!

    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.
  16. conceptualize trench in GMS

    Hi everyone, Can any of you help me with the following question please? I am a beginner of GMS modelling. I want to set up a transient modflow of trench pump testing, however I don't know how to conceptualize the trench. The trench is 100m long, 2m wide, 1m deep, with 7 observation bores locating around the trench. The water levels of trench and bores were logged for 5 hours with pumping rate 1000L/min, and I need to set up a modflow and calibrate the model. The Drain (DRN) package seems not suitable for conceptualizing the trench as the water level of trenching decreasing with time. So can I set up the trench as 5 wells with the pumping rate 200L/min each, or any other suggestions how to deal with the trench please? Thank you for any advice/suggestions in advance. Best regards, Lucy
  17. I apologize, but I am new to GMS and relatively new to Modflow. I have a two layer model with glacial till on top of a bedrock layer for a large watershed. I have my rivers as a polygon shapefile with the data as attributes. Each cell has one polygon associated with it since I intersected my modflow grid and ID each river segment by the cell number (see image right side: Top elevation = surface elevation attribute, riverbed elevation= thalwegM_1, and bottom of grid cell is the berktop attribute, and starting head = StartHead1) I import this into the conceptual model where I have one line for each polygon. I understand that GMS will multiple my conductance value by the area within each cell. However, when I map this to modflow, I have multiple lines per grid cell in the River sources and sinks. Can anyone explain to me where these values are all coming from? (see image left side) I think that they are coming from each effected side of the grid cell? In this example cell, I don't know where the last line is coming from. The stage and elevation are much lower and the conductance is so much higher. Thank you anyone for the clarification! Tammy
  18. 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
  19. Femwater - Decay

    Please let me know if GMS FEMWATER supports transport modeling of decay. The interface provides for entry of a decay constant - but my build runs with a non-numeric value entered and no difference in simulation results if a numeric value is specified.
  20. GMS 10.1 Has Been Updated!

    GMS 10.0 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.
  21. GMS 10.0 Has Been Updated!

    GMS 10.0 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. GMS 10.0 has been updated!

    GMS 10.0 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.
  23. GMS 10.0 Has been updated!

    GMS 10.0 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.
  24. GMS 10.0 Has been updated!

    GMS 10.0 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.
  25. Hi there, while setting up a groundwater model i noticed the following differences between the display of date and time. The time unit is set to seconds. The values in the stress periods windows are entered manually and represent the desired time steps, after i added the recharge to the model the RCH Rate windows shows somehow messed up time steps. If I deactive the Show dates/time tick in the RCh rate windows it shows me values like 0,365 ... etc., 365 seconds result in +/- 6:08 minutes which is shown but actually the time steps should cover 1 year, so 365 days should result in 1 year.
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