MT3DMS simulation with a successive steady state flow model?

[Joseph Krienert]

Hello,

If the link package from a successive steady state model (several stress periods, each in steady state conditions) is used for a transient transport simulation with MT3DMS, I am receiving the following error:

STRESS PERIOD NO.    1

TIME STEP NO.    1
FROM TIME =   0.0000     TO   0.56800E+06

Transport Step:    1   Step Size:  5.6800E+05 Total Elapsed Time:  5.68000E+05
Outer Iter.  1  Inner Iter.  1:  Max. DC =   0.000      [K,I,J]    1    1    1

TIME STEP NO.    2
FROM TIME =  0.56800E+06 TO   0.11360E+07

ERROR: INVALID NUMBER OF STRESS PERIOD OR TIME STEP IN FLOW-TRANSPORT LINK FILE.
NUMBER OF STRESS PERIOD IN FLOW-TRANSPORT LINK FILE =  2
NUMBER OF TIME STEP IN FLOW-TRANSPORT LINK FILE     =  1

Is there means of enabling a serial steady state flow simulation to work with MT3DMS?

[Vivek Bedekar]

Joseph,

It looks like the number of time-steps specified in MODFLOW DIS file is different than the number of "flow" time-steps specified in the MT3D BTN file. Remember, even for steady-state stress periods, one can specify multiple time-steps in the DIS file. Flow time-steps in the BTN file need to be consistent with the DIS file.

One issue with running successive steady-state flow stress periods and simulating transient transport is, you may see mass balance errors in the transport model. Because the successive stress period is steady-state, MODFLOW does not report change in storage of water in the FTL file to MT3D even though the volume of water may change in the successive stress period due to a new head solution, resulting in mass balance errors in the transport simulation.

Vivek Bedekar

www.sspa.com

Sent from Outlook

---

From: mod...@googlegroups.com <mod...@googlegroups.com> on behalf of Joseph Krienert <krie...@gmail.com>
Sent: Monday, August 15, 2016 9:05 AM
To: MODFLOW Users Group
Subject: [MODFLOW] MT3DMS simulation with a successive steady state flow model?

 

--
You received this message because you are subscribed to the Google Groups "MODFLOW Users Group" group.
To unsubscribe from this group and stop receiving emails from it, send an email to modflow+u...@googlegroups.com.
To post to this group, send email to mod...@googlegroups.com.
Visit this group at https://groups.google.com/group/modflow.
For more options, visit https://groups.google.com/d/optout.