MODFLOW Users Group

When I say PEST interface, I refer to all input files Flex creates in order to run PEST. These files

Hello Kaed, Assuming you have similar geological formations or lithological layers in all the

Hi, I am currently conducting a groundwater safety assessment using MODFLOW-2000/2005 with a regional

Dear Nasrin, I hope you are doing well. Regarding the high output head values you are encountering in

I guess it happens when well coordinates are outside the grid boundaries!! Regards, Askar From:

Hi, Is there anyone yet who managed to get it working on Mac or Linux?? Although I just use flopy

Hi, If i remember it right then -1 means that a constant head will be applied from the initial heads

To be short, because they are difficult to measure directly as compared to other parameters such as

Hey Modflow users…. Our two books are being published by John Cherry's Groundwater Project on

Hi all, Does anyone know if it's possible to do sequential decay with MF6? I found something in

you could set a higher RCLOSE (residual change) or HCLOSE (head change) in the solver, it will result

Thank you for the prompt response. I will check as suggested. On Wed, Aug 27, 2025 at 10:56 PM felix

New tutorial in our blog useful for water supply evaluation and design: Inflow modeling to

I'm running MPATH7 on the LA Basin model, which is MF-6. It is a huge model that starts in 1971

The flow rates for each well for each time step are listed in the budget file. On Fri, Aug 15, 2025,

Hi All, In both consulting and research projects that use tools like SWMM, MODFLOW, and other water

Hi all, particularly PHT3D users, I'm simulating transient flow and reactive transport (ion

MODFLOW6 with mf6Voronoi can handle the simulation of specific tasks related to the mine industry. We

Hello everyone, As part of my master's thesis, I've been using Modflow 6 and ModelMuse to

I am not sure if my previous reply posted correctly (I did to author and not to all). It does indeed

Define your stress periods and time steps. It is best to experiment with different time steps and

Hi Sudarsan, Thanks for sharing your experience. It turned out in my case it's because some of

Anything written in the output file (.out) ? Regards, Askar From: mod...@googlegroups.com <

Dear Jakab, Thank you for your clear explanation. It turns out that in my Pest package i did not

So, GMS sometimes does this where if you have a lot of GHB cells that have head below cell bottom, it

Hi Singh, I am happy to guide you. You can send your file here or send it to rab...@seoe.sc.edu On

You may be losing too much water out of the model from your lowest layer. Experiment by (1)

Hi everyone, I carried out a regional groundwater model setup using MODFLOW-OWHM 2.3 and ModelMuse

Hello there, I am using MODFLOW6 in ModelMuse for groundwater analysis. I am using PEST auto

To me, this sounds like you haven't set up your zones the way you think you have. On Sat, Jul 19,