Jump to content
GMS, SMS, and WMS User Forum


  • Content count

  • Joined

  • Last visited

Community Reputation

0 Neutral

About LeoCN-IL

  • Rank
  1. Errors in risk analysis of stochastic modeling

    Hi, can you be more specific? Do you mean you cannot continue completing the risk analysis and it was interrupted by the "error" information? If so, maybe try to use the new version of GMS. I upgraded to the latest version (GMS10.2? maybe) and the problem was solved. Of course, you need to make sure there are no other errors with the model you built. Hope it can give you some idea to solve the problem. Cheers!
  2. Hi, I'm writing to ask if there is such a function in GMS stochastical modeling that can stochastically randomize the distribution of parameters within the aquifer. I know in GMS, we can randomize the value of different parameters (for example, to randomize the hydraulic conductivity K by defining the sampling range to produce several realizations). But I want to ask if it's possible to generate a stochastically distributed aquifer with one or two parameters being stochastically distributed within the aquifer (for example, K is stochastically distributed within the aquifer by following lognormal distribution, therefore, the aquifer is with different K values at different location, rather than the different constant value for different realizations). I think this may represent the natural heterogeneous aquifer better. I know in HYDRUS 3D, it is possible to construct such an aquifer, but MODPATH is not supported in HYDRUS, therefore, I want to ask if it's possible to do it in GMS. Thanks so much for your attention and any comments are welcome! Yue
  3. Errors in risk analysis of stochastic modeling

    Hi Alan, thanks! Yes I just did like that and it works. But still, I'm not able to contour these datasets. I just feel it's quite strange. Cause I had worked in another model to delineate the probabilistic capture zone plume. After I run the risk analysi, the plume graph just came out on the screen automatically, together with the files. However, in the model I'm working on right now, it doesn't work. I only received the datasets without graph shown on screen. Do you maybe have any ideas about how to contour these datasets? Thanks sooo much!
  4. I'm now conducting risk analysis based on the stochastic modeling in order to get the probabilistic capture zone distribution graph. However, when I finished the risk analysis, GMS only produced several datasets, without the distribution graph shown on the screen. These datasets are named by name of the wells and I believe they can be used for contouring. Anybody knows how to operate it? Thanks!
  5. Errors in risk analysis of stochastic modeling

    Thanks for your comments, Alan. I was also thinking these datasets should be contourable. However, I tried several time, i turned on the contour option and set for the color fill, but I cannot get the probability plume. I only got the same color on th screen, without any plume circles. May I ask for another question? The model was built on HUF package. The hydraulic conductivities were given by the material types(rather than by layers). If I want to randomize the K value as well, can I just modify the K values in the material module( change them into negative values)? Then run the stochastic model. Or I need to do as the tutorial: indicator stochastic modeling? Many thanks!
  6. Errors in risk analysis of stochastic modeling

    I've tried to not to redefine the smaller local area, just work on the original large model. I chose the recharge of the small study area as the parameter to be randomized and run stochastic modeling, for example, I run 10 realizations. The results came out successfully and I received the groundwater head simulation results of these 10 realizations. Then I tried to do risk analysis based on these results. This time, there is no error with it. However, I cannot get the probabilistic capture zone distribution graph. Instead, I only received several data files with the name of all the pumping wells in my model. I have no idea how to deal with the data. I tried to export one of the data and open it by Excel, but I don't really understand what it means (it contains lots of 0 and 1). Can anyone tell me how can I get the probabilistic capture zone distribution picture? I attached the screenshot of my GMS model. Also I attached one of the files. Thanks! 14112902.dat
  7. I'm working on using GMS-MODFLOW to delineate the capture zone stochastically. The conceptual model I'm working on is built based on HUF package (run in HUF Package). As it's a quite large area, but my study area is just a smaller one inside. Therefore, I build smaller coverage to define the study area with specific head boundaries. Then I run MODFLOW and MODPATH again, so the results only come from the smaller study area. However, when i was trying to run the stochastic model, which took the recharge rate of the study area as the parameter with different probabilities. I defined the key value of the recharge rate, and run it stochastically, everything went well. I got the results of these realizations. Then i was trying to do the risk analysis, in order to generate the probabilistic capture zone distribution. However, it showed that"MODPATH had errors, cannot read error files", that I can not get the results of the probabilistic capture zone distribution. Do you have any idea that what's the problem with it? As it's the essential part of my graduate project, it's really important that I should fix the errors ASAP. Your kind help and assistance would be greatly appreciated.