> I want to simulate the movement of an acidic water through a calcite-bearing soil and graphically illustrate the "banding" that one would see as Fe and Al hydroxides, and thereafter Mn oxides, precipitate. But I am not sure how to setup the advection block to output the correct data to the selected output file. I should be able to do this with one cell, and move progressived pore volumes through. Somehow I need to graphically display the amount of mineral versus a "distance" rather than a pore volume ( i think). I'm not sure how you want to convert time to distance, but USER_PUNCH will allow you to make any calculation you want. The variable TOTAL_TIME contains the simulation time and can be used in Basic statements in USER_PUNCH. > One thing I have done is produced a titration curve where I reacted calcite with the water in increments, and indeed it shows Fe and Al precipitating before Mn. But, it would be nice to have a "depth versus mineral concentration" plot that shows the banding I have observed in the field. Can you provide any suggestions? Seems like you should set up a multi-cell column and plot the amounts of the mineral with distance. You can use -equilibrium_phases to put the data into the selected output file, or use the MIN function in Basic statement in USER_PUNCH. 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 2002 since Jan 22, 1998.