Using temperature time-series data for changing microbial rate constant based on Q10 coefficients in PFLOTRAN

[Bisesh Joshi]

Hi all,

I'm trying to develop Reaction Sandbox to incorporate temperature-dependent microbial rates for my biogeochemical reaction network using Q10 coefficients. Please let me know if anybody has done similar work or has example reaction sandbox files for it. Any help is highly appreciated.

Thank you.

Best regards,

Bisesh

--

Bisesh Joshi

PhD student

Water Science and Policy

Graduate College

University of Delaware

901-297-6761

[Hammond, Glenn E]

Buses,

I apologize for the late response. I have been on vacation since Dec 13.

It doesn’t sound like anyone has ideas/examples/experience with your proposed approach. Perhaps, if you provide a short/concise description of your concept/conceptual model, at least a first pass at what you want to employ, others will comment.

Glenn

From: pflotra...@googlegroups.com <pflotra...@googlegroups.com> on behalf of Bisesh Joshi <bjo...@udel.edu>
Date: Sunday, December 14, 2025 at 4:54 PM
To: pflotra...@googlegroups.com <pflotra...@googlegroups.com>
Subject: [pflotran-users: 8635] Using temperature time-series data for changing microbial rate constant based on Q10 coefficients in PFLOTRAN

Check twice before you click! This email originated from outside PNNL.

--
You received this message because you are subscribed to the Google Groups "pflotran-users" group.
To unsubscribe from this group and stop receiving emails from it, send an email to pflotran-user...@googlegroups.com.
To view this discussion visit https://groups.google.com/d/msgid/pflotran-users/CAEvi1ySMJ3z3pt%2B153uk9PAjyBRLLboF-g9T4ftVar2LpCer1A%40mail.gmail.com.

[Sam Shaheen]

Hi Bisesh,

MICROBIAL_REACTION supports the ACTIVATION_ENERGY keyword to implement an Arrhenius temperature-dependent scaling of the rate constant. I believe Q10 values can be converted into an activation energy for the Arrhenius equation. You can use this to avoid needing the reaction sandbox altogether.

-Sam

[Bisesh Joshi]

Thanks for the response, Glenn.  I was looking for a method to incorporate temperature effects on monod kinetics based on available Q10 values.

Thanks, Sam. This suggestion helps a lot.

To view this discussion visit https://groups.google.com/d/msgid/pflotran-users/1612eaf6-c909-421e-8dc5-5d3ec1d70986n%40googlegroups.com.