> I will be using PHREEQC to model soil & ground water controls on solute fluxes with Jamie Shanley at the Sleepers River WEBB site. Great. I think there must be a good story there with all the information they have collected. > I first posed this question to Don Siegel since he taught an Aqueous Geochem course using PHREEQC last spring and he suggested writing directly to you. I have dissolved organic carbon data and want to include these data in model runs. Can DOC be incorporated into PHREEQC as concentration input data? I have not had any luck when looking through the manual for DOC as a solution species. Can you direct me to any resources regarding DOC as an input parameter to PHREEQ? I'm not sure what you want to do with the DOC in the model. The wateq4f.dat has Fulvate and Humate defined, but that is only useful for metal-binding calculations. You can define a Doc "element" with SOLUTION_MASTER_SPECIES and SOLUTION_SPECIES and then enter the Doc, but that would essentially produce a conservative element that moves with the water. You could expand on that and react the Doc by using a KINETIC reaction (and associated RATE) that removes Doc and introduces C, 2H, and O into the solution, which would simulate organic decomposition, but maybe that isn't a big reaction at Sleepers River? So if you tell me what you really need to calculate, I can probably give you some advice on how to proceed. 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 3374 since Jan 22, 1998.