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Geochemist's Workbench Support Forum

John Lisle

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  1. Good afternoon, I've been trying to figure out the rational behind assigning values to the "power", "powerA" and "powerD" options in the kinetic microbial reaction page of the Reactants window in GWB11. I've read through the GWB Reaction Modeling Guide (rel. 11), the Microbial Kinetics chapter in G&BRM book and the various videos and tutorials on your website. Its not clear to me when to use these options and what determines my decision to enter nothing, enter 1 or a value greater than 1 (which I've seen in some of the examples). My interest in using this option of GWB is I'm trying to model microbial processes (at this point just in solution and not on the aquifer matrix) in an anaerobic and reduced (-350 mV) groundwater system. I'm currently using a spreadsheet method to generate data from the kinetic model described by Jin & Bethke's series of papers and Chp 18 in G&BRM but would like to move these calculations into GWB due to the graphs and other data generated and to compliment the geochemical analyses. If you could provide some guidance on how these variables and the values entered influence the outputs from the analyses I would be truly grateful. If there are specific papers or other resources which can guide me through this please send those along and I'll work through those.
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