Thanks for the email / program. I am interested in using the program for determining the makeup of waters (and precipitates) following different amounts of evaporation. After reading the manual (text) information it seems that this should work well up to a certain level of salinity (stated as in the range of seawater and above). With this use in mind I have a fwe questions: QUESTION 1: would you recommend software to use at higher salinities? EQ3/6 or something else? Example 1 of PHREEQC determines the speciation of seawater. The data input corresponds to standard water quality for seawater. I have always assumed that this 'standard' WQ for seawater refers to the common elements in their dissolved state. In this instance calcium at 412.3 ppm would be assumed to be nearly all in ionic form. Yet the results of the simulation suggest that about 10% of the calcium is present as CaSO4. While nucleation of CaSO4 can be such that initially it is dissolved I would assume that here CaSO4 implies solids that are precipitated. QUESTION 2: Is this correct? OR am I missing something? Thanks again for your help, Mike Mickley ----------------- Mickley & Associates 752 Gapter Road Boulder, Colorado 80303 303-499-3133 fax 303-499-5305 www.mickleyassoc.com ----- Original Message ----- From: "David L Parkhurst" <dlpark@xxxxxxxx> To: "Mike Mickley" <michael@xxxxxxxxxxxxxxxx> Sent: Wednesday, August 13, 2003 4:08 PM Subject: Re: trouble downloading PHREEQC for Windows > > (See attached file: psetup1510.exe) > > > I don't know. Every once in a while someone has problems and I don't know > if it is us or them. This file is small enough to email. > > 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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