MODFLOW-2005 inputs

[木耳]

Good afternoon everyone, I'm a student who is new to studying groundwater flow modeling.

I obtained the MODFLOW input file through Visual MODFLOW and tried running it using the modflow-2005.exe file in the command prompt, but it displayed an error and couldn't run.

this picture shows the error information. Please help me, thank you.

[Boyce, Scott E]

Unit 0 to 6 are reservered for Fortran standard I/O and should not be used. MODFLOW also reservers 98 and 99 for its temporary files. The problem is your name file is declaring the list to use 6 as the unit number with:

LIST  6  list.txt

Typically, its best to make unit numbers >100 and they need to be unique for each file that is being opened (you can reuse the unit number after that point when referencing the file).

For example,

DATA 121 input.txt​

makes input.txt associated with unit number 121. If you want to reference the file by unit you could do something like

EXTERNAL 121​.

Note if you use in the place of MODFLOW-2005, MODFLOW-OWHM (based off of 2005), unit numbers are optional for packages.

So you could change:

LIST  6  list.txt​

with just

LIST   list.txt​

Also you can reference data files by name for full path, such as

DATA 121 ./dir/input.txt

could be referenced as:

EXTERNAL 121

or

EXTERNAL ./dir/input.txt

or

EXTERNAL input.txt

Note if you reference just the filename and it is not unique an error is raised saying you must specify the full path due to not knowing which file to use.

Code and Download page:

https://code.usgs.gov/modflow/mf-owhm 

Main Landing Website

https://www.usgs.gov/software/modflow-one-water-hydrologic-flow-model-mf-owhm 

Main Documentation (I usually recommend the first 20 pages and Appendix 4 for new users):

https://pubs.er.usgs.gov/publication/tm6A60 

If you program in Fortran, this is my attempt at a lot of library files to help with coding:

https://code.usgs.gov/fortran/bif

Hope that helps out,

Scott

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From: mod...@googlegroups.com <mod...@googlegroups.com> on behalf of 木耳 <shol...@gmail.com>
Sent: Tuesday, October 17, 2023 12:02 AM
To: MODFLOW Users Group <mod...@googlegroups.com>
Subject: [EXTERNAL] [MODFLOW] MODFLOW-2005 inputs

 

 

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