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River package and river import from MODFLOW

CH
Christian Haars, modified 10 Months ago.

River package and river import from MODFLOW

Youngling Posts: 18 Join Date: 3/25/17 Recent Posts
Hey guys,

I am trying to establish a river into my model. I created the necessary files for bottom, stage, inf factor and conductance with ISG-Edit. However, as soon as I try to run the model, an error occurs.I attached the list-file. All the related IDFs are assigned to layers automatically.

How do I properly import a river from MODFLOW 2005 into my model? Using the import function in iMOD does not work.

Best regards,
Christian
river package modlfow import
Frans Roelofsen, modified 11 Months ago.

RE: River package and river import from MODFLOW

Padawan Posts: 59 Join Date: 11/11/13 Recent Posts
Hi Christian,

From the attached logfile I find out you run with iMODFLOW 3.4.
-> Are you aware version 3.6 was released recently?
I am not sure it will solve your issue but you can try.

From the logfile I can not derive what caused the error.
In your results directory there is another log file with the standard Modflow 2005 content.
You find it as <your result dir>\mf2005_tmp\*.list
-> if this file cannot help you find the problem, please share it in this forum.

You write about a problem importing a river from MODFLOW 2005.
This modflow import tool only supports the import of a complete model (not a single river file).
-> Please share the error message or error window and the forum community can maybe help.

To finalize; your write you created an ISG river file first, converted it into IDF grids and included it in the RUN file under the RIV module.
-> Did you consider to include the river in the RUN file under the ISG module referring to your *.isg file directly?

Kind regards,
Frans
CH
Christian Haars, modified 11 Months ago.

RE: River package and river import from MODFLOW

Youngling Posts: 18 Join Date: 3/25/17 Recent Posts
Thanks for the answer, Frans. I did not try to include the river under ISG in the RUN file.

I just requested v3.6 and will then try the river tutorial first. Hopefully that will solve my issues and enable me to properly include the rivers into my model.

Best regards,
Christian
CH
Christian Haars, modified 10 Months ago.

RE: River package and river import from MODFLOW

Youngling Posts: 18 Join Date: 3/25/17 Recent Posts
Dear community,

I am working with v3_6 now. So far the ISG feature looks a lot better than before. Still, I encountered two problems:

1. However, I haven't unerstood the difference between using an RIV or SFR applicable ISG feature.

2. Moreover, my 'old' ISG from v3_4 still only has the old settings and options available. Can I change that somehow? Importing the old imf-file seemed to work and so far I haven't found any other problems than the one mentioned.

Best regards,
Christian
Frans Roelofsen, modified 10 Months ago.

RE: River package and river import from MODFLOW (Answer)

Padawan Posts: 59 Join Date: 11/11/13 Recent Posts
Hi Christian,

See whether chapter 12 of the iMOD Manual helps you to understand the general difference of the RIV and SFR package (manual chapter 12.20 and 12.28).
Feel free to ask a detailed questions on both modules.

Do you mean with your second question that you want to convert a standard ISG file to a SFR style ISG?
In the iMod Batch library there is the ISGTOSFR Function.
As you can see from the manual, the update of that function is still in progress. At present, this function is not robust enough.
An alternative route is perhaps to use the function IPFTOISG.

Kind regards,
Frans