> Opps. I sent you the wrong file. Pl. use this. There's 3x times the Cl- in B. I don't think you can dissolve that much halite. Looks to me like the evaporation factor should be larger, about 8 L goes to 1 L. To model this you need to remove the halite, but add balances on Na and Cl. I also doubt that biotite dissolves or precipitates. If you remove halite and biotite, you can probably ignore the potassium, but you'll need a sink for Mg. For starters, I might guess that it is taken up with calcium into calcite. You can model this by adding magnesite and just combine the calcite and magnesite in your head as a magnesian calcite. > Do you have any suggestions about how I can control the water balance during baseflow (&very low evap) months ? I'm attaching an example. There is much more measured flow at B (10x)than at A due to contribution of lateral&baseflow. Perhaps, there are other sub-routines/keywords in phreeqc that I could use ? You need a composition for the ground water that is discharging to the stream. Then you can mix the stream with the ground water to make the final stream water. INVERSE_MODELING allows multiple initial solutions that mix together simply by adding another solution number on the -solutions line. The last solution number is the final water. 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
Please note that some U.S. Geological Survey (USGS) information accessed through this page may be preliminary in nature and presented prior to final review and approval by the Director of the USGS. This information is provided with the understanding that it is not guaranteed to be correct or complete and conclusions drawn from such information are the sole responsibility of the user.
Any use of trade, product, or firm names in this publication is for descriptive purposes only and does not imply endorsement by the U.S. Government.
The URL of this page is:
Last modified: $Date: 2005-09-13 21:04:21 -0600 (Tue, 13 Sep 2005) $
Visitor number 2071 since Jan 22, 1998.