[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Fw: Transport problem



----- Original Message -----
From: "David L Parkhurst" <dlpark@xxxxxxxx>
To: "Bernd Ehret" <bernd.ehret@xxxxxxxxxxxxx>
Sent: Thursday, June 28, 2001 4:33 PM
Subject: Re: Transport problem



> David
>
>
> David Parkhurst (dlpark@xxxxxxxx)
> U.S. Geological Survey
> Box 25046, MS 413
> Denver Federal Center
> Denver, CO 80225
>
Thank you very much for your information. It's a pity but there are always
some more questions:

1)    identifier -alkalinity in SELECTED_OUTPUT     o.k.

2)
> Both versions appear to be consistent in calculating a pH of 10. I believe
> the program is making the proper calculation for the conditions that you
> have specified. You need to look at the changes in the distribution of
> species for the surface complexes to see what is causing the high pH
> values. It is probably related to the selection of log K values for the
> surface complexes and the initial conditions.

I have done the calculation without surface complexes - and there are the
same results for pH
and only very small differences for concentrations in cell 20 shift 20, see
excel sheets.

Bernd

bernd.ehret@xxxxxxxxxxxxx
ehbernd@xxxxxx

Attachment: 19646008trn.xls
Description: MS-Excel spreadsheet

Attachment: 19646008trn_2.xls
Description: MS-Excel spreadsheet

Attachment: 196460008-22_ohneSurface.in
Description: Binary data

Attachment: 196460008-22.in
Description: Binary data



Project Home Page
Complete Water Resources Division Software
USGS Home Page
Water Resources Division Home Page
NRP Home Page
Help Page
USGS Privacy Statement       

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: https://wwwbrr.cr.usgs.gov/projects/GWC_coupled/phreeqc/mail/msg00272.html
Email:dlpark@usgs.gov
Last modified: $Date: 2005-09-13 21:04:21 -0600 (Tue, 13 Sep 2005) $
Visitor number 2165 since Jan 22, 1998.