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F TW
,
Richard Winston
4
12/23/25
Does LAK automatically suppress RCH and EVT when lake cells are wet?
Hi Richard, thanks for your suggestion. Since my 19 December message, I extended my MF6 test to make
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Does LAK automatically suppress RCH and EVT when lake cells are wet?
Hi Richard, thanks for your suggestion. Since my 19 December message, I extended my MF6 test to make
12/23/25
Velamuri Lakshme Sravya
12/22/25
Cannot open template file and instruction file while using PEST
Hello everyone, I am using modelmuse MODFLOW-NWT for my thesis work. I have setup a modflow model in
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Cannot open template file and instruction file while using PEST
Hello everyone, I am using modelmuse MODFLOW-NWT for my thesis work. I have setup a modflow model in
12/22/25
Zena Tessema
,
Jakab Andras - Gmail
6
12/17/25
Help on configuration problem
Dear Andras Thank you for the valuable information, I will try my best! Thank you once again Andras
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Help on configuration problem
Dear Andras Thank you for the valuable information, I will try my best! Thank you once again Andras
12/17/25
Zena Tessema
,
Richard Winston
4
12/16/25
Request for help
Dear Prof. Richard, Thank you for your response. I would appreciate your help with the configuration
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Request for help
Dear Prof. Richard, Thank you for your response. I would appreciate your help with the configuration
12/16/25
M T
,
Kenneth Ugalde
2
12/14/25
Ask to guid
Hi all. Environmental geologist/hydrogeologist here, with +15 years experience in
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Ask to guid
Hi all. Environmental geologist/hydrogeologist here, with +15 years experience in
12/14/25
Saul Montoya
, …
Abioye, R. Damilola
6
12/11/25
Join this PEST with Model Muse course in January
Randall, Is there a registration for this event? On Thu, Dec 11, 2025 at 10:23 AM Randall Hanson <
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Join this PEST with Model Muse course in January
Randall, Is there a registration for this event? On Thu, Dec 11, 2025 at 10:23 AM Randall Hanson <
12/11/25
Alex Simpson
12/8/25
ModelMuse Error when importing a MODFLOW 6 model
Hello everyone! I'm trying to import one of the USGS test files (found here: https://github.com/
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ModelMuse Error when importing a MODFLOW 6 model
Hello everyone! I'm trying to import one of the USGS test files (found here: https://github.com/
12/8/25
David Lam
, …
Utsho Bhowmik
6
12/7/25
Looking for MODFLOW/GW Modeling Help/Tutor - Rutgers University Student Project
Hi David, Thanks for reaching out and sharing this opportunity. I'd be happy to learn more about
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Looking for MODFLOW/GW Modeling Help/Tutor - Rutgers University Student Project
Hi David, Thanks for reaching out and sharing this opportunity. I'd be happy to learn more about
12/7/25
Alex Simpson
12/3/25
Is MODFLOW Code Verification Published Anywhere?
Hey guys, PhD student here. I'm just starting to learn MODFLOW, and I'm hoping to use its new
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Is MODFLOW Code Verification Published Anywhere?
Hey guys, PhD student here. I'm just starting to learn MODFLOW, and I'm hoping to use its new
12/3/25
Khaoula CHARREK
,
Richard Winston
2
12/2/25
DISV grid gets weird when I refine the grid..
You need to check how the layer elevations are assigned. If you used an object that only assigns
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DISV grid gets weird when I refine the grid..
You need to check how the layer elevations are assigned. If you used an object that only assigns
12/2/25
Lærke Ditlevsen
,
Richard Winston
3
11/26/25
Optimization with EVT package - flopy/mf6
Hi Richard, Thank you for your help - the mf6io.pdf absolutely pointed me in the right direction (I
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Optimization with EVT package - flopy/mf6
Hi Richard, Thank you for your help - the mf6io.pdf absolutely pointed me in the right direction (I
11/26/25
Gabriella Menezes
11/20/25
Questions about ModeMuse/ MT3D USGS
Hello everyone, I'm getting started with groundwater modeling and I'm having some
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Questions about ModeMuse/ MT3D USGS
Hello everyone, I'm getting started with groundwater modeling and I'm having some
11/20/25
milan
, …
Jakab Andras - Gmail
3
11/20/25
Pest in Modelmuse
Milan, I'm not a ModelMuse user, but I'm sure it has a few tutorials about PEST (https://www.
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Pest in Modelmuse
Milan, I'm not a ModelMuse user, but I'm sure it has a few tutorials about PEST (https://www.
11/20/25
bijen bajracharya
, …
Jakab Andras - Gmail
5
11/18/25
Not able to extract mass balance information
As a first option I recommend moving your project on a computer drive. Never use a synching folder to
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Not able to extract mass balance information
As a first option I recommend moving your project on a computer drive. Never use a synching folder to
11/18/25
Mostafa Gomaa Daoud
11/18/25
How to access binary output of vertical displacement (or in general other variable than head)
I am using MODFLOW 6 with Flopy. I am stuck with the CSUB package. I want to get the outputs of the
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How to access binary output of vertical displacement (or in general other variable than head)
I am using MODFLOW 6 with Flopy. I am stuck with the CSUB package. I want to get the outputs of the
11/18/25
martclanor
, …
Saul Montoya
8
11/17/25
VS Code extension for MODFLOW 6
Great Mart I did a TikTok about it: Know more about the VS Code extension for MODFLOW 6. https://www.
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VS Code extension for MODFLOW 6
Great Mart I did a TikTok about it: Know more about the VS Code extension for MODFLOW 6. https://www.
11/17/25
Christian Montoro Paredes
,
Richard Winston
3
11/17/25
forrtl: error (72): floating overflow using PEST
Thank you. The Pest calibration is still giving some problems even with paramter restrictions and the
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forrtl: error (72): floating overflow using PEST
Thank you. The Pest calibration is still giving some problems even with paramter restrictions and the
11/17/25
Sergio Fernando Poveda Salazar
11/10/25
Pilot point interpolation exceeding parameter bounds in PEST–MODFLOW calibration
Hi, I'm calibrating a MODFLOW-2005 model using PEST through ModelMuse. In the locations of the
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Pilot point interpolation exceeding parameter bounds in PEST–MODFLOW calibration
Hi, I'm calibrating a MODFLOW-2005 model using PEST through ModelMuse. In the locations of the
11/10/25
M T
, …
Mahesh Maskey
5
11/10/25
Question
Dear MT, Thank you for sharing this question — it's a situation many of us have faced with
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Question
Dear MT, Thank you for sharing this question — it's a situation many of us have faced with
11/10/25
Dr. Jagadeesh G
11/6/25
New groundwater tool open source
Hi all, I'm excited to share a new groundwater tool that allows us to instantly generate
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New groundwater tool open source
Hi all, I'm excited to share a new groundwater tool that allows us to instantly generate
11/6/25
Fatima Kastali
, …
Richard Winston
5
11/6/25
mfsim.nam File not found
ModelMuse generates a batch file that renames your steady.mfsim.nam to mfsim.nam just before running
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mfsim.nam File not found
ModelMuse generates a batch file that renames your steady.mfsim.nam to mfsim.nam just before running
11/6/25
Dr. Yohannes Yihdego
10/27/25
Re: [MODFLOW] Abridged summary of modflow@googlegroups.com - 5 updates in 1 topic
Hi, Possible causes are boundary condition, contrasting hydraulic conductivity (> 2 order of
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Re: [MODFLOW] Abridged summary of modflow@googlegroups.com - 5 updates in 1 topic
Hi, Possible causes are boundary condition, contrasting hydraulic conductivity (> 2 order of
10/27/25
Ajaykumar Venkatarao
, …
anandconsultants2009
6
10/27/25
Output heads are much higher than initial heads in steady-state MODFLOW model
Dear Sir/Madam: Would appreciate Shoreline modelling experts to contact me on rakeshcshah2003@yahoo.
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Output heads are much higher than initial heads in steady-state MODFLOW model
Dear Sir/Madam: Would appreciate Shoreline modelling experts to contact me on rakeshcshah2003@yahoo.
10/27/25
Chris Kim
,
Jakab Andras - Gmail
2
10/22/25
How do you define layers and assign conductivities in Visual MODFLOW?
This is a rather conceptual question, and the answer may be different depending a few factors. I
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How do you define layers and assign conductivities in Visual MODFLOW?
This is a rather conceptual question, and the answer may be different depending a few factors. I
10/22/25
Fatima Kastali
, …
Richard Winston
6
10/22/25
PEST with MODFLOW 2005 in ModelMuse – No PEST Parameters Assigned
Hello everyone, I'm currently developing a groundwater flow model in ModelMuse using MODFLOW 2005
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PEST with MODFLOW 2005 in ModelMuse – No PEST Parameters Assigned
Hello everyone, I'm currently developing a groundwater flow model in ModelMuse using MODFLOW 2005
10/22/25
Rahena Parvin Rannu
,
Richard Winston
4
10/16/25
error while running modflow within groundwater vistas
How about a unit number of five (+5). MODFLOW sometimes use a negative number to indicate that a
unread,
error while running modflow within groundwater vistas
How about a unit number of five (+5). MODFLOW sometimes use a negative number to indicate that a
10/16/25
Sergio Fernando Poveda Salazar
,
Jakab Andras - Gmail
3
10/16/25
Interrupting PEST calibration
Thank you Andras! I used "/r" parameter and it worked finely. El miércoles, 15 de octubre
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Interrupting PEST calibration
Thank you Andras! I used "/r" parameter and it worked finely. El miércoles, 15 de octubre
10/16/25
Amjad Aliewi
, …
Ajaykumar Venkatarao
5
10/15/25
Converting active cells to inactive cells
In Visual MODFLOW Flex, go to Numerical Model → Property Zone → IBOUND (Active/Inactive). Select the
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Converting active cells to inactive cells
In Visual MODFLOW Flex, go to Numerical Model → Property Zone → IBOUND (Active/Inactive). Select the
10/15/25
Althea Walker-Hallam
10/14/25
SWR model instability
Hi, I was hoping I could get some advice about improving the stability of my SWR channel model. The
unread,
SWR model instability
Hi, I was hoping I could get some advice about improving the stability of my SWR channel model. The
10/14/25
Sven Follin
10/13/25
Methodology for integrated hydrological and hydrogeological flow modelling
Happy to share that the report "Methodology for hydrological and hydrogeological modelling of
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Methodology for integrated hydrological and hydrogeological flow modelling
Happy to share that the report "Methodology for hydrological and hydrogeological modelling of
10/13/25