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

Re: thanks




> 1- The Program always give me Error,[ it is impossible to balance
solution
with input uncertainties ] I used default uncertainties and tried to change

it.

Look at the charge balance for your solutions, it is printed out at the top
of the distribution of species. Apparently, your solutions have > 10%
charge imbalance. Check that the analyses are defined correctly and try to
figure out what is the reason for the large imbalance. The uncertainty for
inverse modeling must be greater than half of the percent charge imbalance
error.


> 2-  Why program calculate SI from initial solution . It is supposed to
calculate SI from final solution not from the initial [ as i have two
solution
only one initial and the other final]

PHREEQC calculates a distribution of species and SI's for every solution
defined in SOLUTION data blocks. It is necessary to calculate the total
concentrations, charge balance, and alkalinity that is used in inverse
modeling.

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





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/msg00171.html
Email:dlpark@usgs.gov
Last modified: $Date: 2005-09-13 21:04:21 -0600 (Tue, 13 Sep 2005) $
Visitor number 1647 since Jan 22, 1998.