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Re: PHREEQC




> What's the difference between what you did and what I did? Also, I don't
really understand what equilibrium phases does. My understanding is that it
is used to model how the minerals act in water at equilibrium under certain
conditions.

What does the manual say about EQUILIBRIUM_PHASES?

Do you know what saturation indices are?

What are the differences between these three simulations?

SOLUTION 1
EQUILIBRIUM_PHASES 1
      Calcite     0     10
      CO2(g)      -2.0  10
END
SOLUTION 2
EQUILIBRIUM_PHASES 2
      Calcite     -1    10
      CO2(g)      -2.0  10
END
SOLUTION 3
EQUILIBRIUM_PHASES 3
      Calcite     0     0
      CO2(g)      -2.0  10
END

> Then, the final question is, after the sea water and ground water
interaction have been taken care of, do I use equilibrium phases to add in
the limestone aquifer interaction? Thank you again for your help!

You tell me what you think and I'll comment.

David


David Parkhurst (dlpark@xxxxxxxx)
U.S. Geological Survey
Box 25046, MS 413
Denver Federal Center
Denver, CO 80225

Project web page: https://wwwbrr.cr.usgs.gov/projects/GWC_coupled




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