Sounds like something in your formulation is inconsistent. One example would be Cl decreasing from solution 1 to solution 2, halite is the Cl source, but halite is required to dissolve. Look through each element and consider whether it increases or decreases and whether there is a mineral that is a possible source or sink for each element. Another place to look is with redox. If redox is involved, try adding O2(g) as a reactant that can dissolve or precipitate and see if that points the way to your problem. If you send me the input file, I'll try to take a look. David David Parkhurst (dlpark@xxxxxxxx) U.S. Geological Survey Box 25046, MS 413 Denver Federal Center Denver, CO 80225 h2osoft Sent by: Michele To: David L Parkhurst/WRD/USGS/DOI@xxxx Y Crouse cc: gs-w_h2osoft@xxxxxxxx In-Reply-To: <OF3D9E807B.DAF3204F-ON85256A30.00616249@xxxxxxxx> Subject: problems with uncertainty term in inverse model 04/16/01 10:45 AM ----- Forwarded by Michele Y Crouse/WRD/USGS/DOI on 04/16/01 01:43 p.m. ----- "Barbara Coto Suarez" To: h2osoft@xxxxxxxx <barbarapiri@xxx cc: In-Reply-To: <OF3D9E807B.DAF3204F-ON85256A30.00616249@xxxxxxxx> mail.com> Subject: 04/16/01 01:34 p.m. Hello. I am a Spanish student working with Phreeqc. I am trying to do an inverse modelling and I have problems with the uncertainty term, I am not able to run the program unless I specify a value of 1, and this means a really big error. Can you please give me any advise about this?. I can send you my input file if you need it. Thank you very much. Barbara Coto Suarez Tu correo gratis en MixMail http://www.mixmail.com Ayudanos a ganar los iBest! http://www.ya.com/ibest
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 1975 since Jan 22, 1998.