Modeling the effect of soil meso- and macropores topology on the biodegradation of a soluble carbon substrate

Laure E. Vogel, David Makowski, Patricia Garnier, Laure Vieublé-Gonod, Yves Coquet, Xavier Raynaud, Naoise Nunan, Claire Chenu, Ruth E. Falconer, Valérie Pot

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Abstract

Soil structure and interactions between biotic and abiotic processes are increasingly recognized as important for explaining the large uncertainties in the outputs of macroscopic SOM decomposition models. We present a numerical analysis to assess the role of meso- and macropore topology on the biodegradation of a soluble carbon substrate in variably water saturated and pure diffusion conditions . Our analysis was built as a complete factorial design and used a new 3D pore-scale model, LBioS, that couples a diffusion Lattice-Boltzmann model and a compartmental biodegradation model. The scenarios combined contrasted modalities of four factors: meso- and macropore space geometry, water saturation, bacterial distribution and physiology. A global sensitivity analysis of these factors highlighted the role of physical factors in the biodegradation kinetics of our scenarios. Bacteria location explained 28% of the total variance in substrate concentration in all scenarios, while the interactions among location, saturation and geometry explained up to 51% of it.
Original languageEnglish
Pages (from-to)123-136
Number of pages14
JournalAdvances in Water Resources
Volume83
Early online date30 May 2015
DOIs
Publication statusPublished - Sep 2015

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macropore
topology
biodegradation
substrate
carbon
modeling
soil
saturation
geometry
soil structure
physiology
sensitivity analysis
decomposition
kinetics
water
bacterium
effect
analysis

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Vogel, L. E., Makowski, D., Garnier, P., Vieublé-Gonod, L., Coquet, Y., Raynaud, X., ... Pot, V. (2015). Modeling the effect of soil meso- and macropores topology on the biodegradation of a soluble carbon substrate. Advances in Water Resources, 83, 123-136. https://doi.org/10.1016/j.advwatres.2015.05.020
Vogel, Laure E. ; Makowski, David ; Garnier, Patricia ; Vieublé-Gonod, Laure ; Coquet, Yves ; Raynaud, Xavier ; Nunan, Naoise ; Chenu, Claire ; Falconer, Ruth E. ; Pot, Valérie. / Modeling the effect of soil meso- and macropores topology on the biodegradation of a soluble carbon substrate. In: Advances in Water Resources. 2015 ; Vol. 83. pp. 123-136.
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Vogel, LE, Makowski, D, Garnier, P, Vieublé-Gonod, L, Coquet, Y, Raynaud, X, Nunan, N, Chenu, C, Falconer, RE & Pot, V 2015, 'Modeling the effect of soil meso- and macropores topology on the biodegradation of a soluble carbon substrate', Advances in Water Resources, vol. 83, pp. 123-136. https://doi.org/10.1016/j.advwatres.2015.05.020

Modeling the effect of soil meso- and macropores topology on the biodegradation of a soluble carbon substrate. / Vogel, Laure E.; Makowski, David; Garnier, Patricia; Vieublé-Gonod, Laure; Coquet, Yves; Raynaud, Xavier; Nunan, Naoise; Chenu, Claire; Falconer, Ruth E.; Pot, Valérie.

In: Advances in Water Resources, Vol. 83, 09.2015, p. 123-136.

Research output: Contribution to journalArticle

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AU - Coquet, Yves

AU - Raynaud, Xavier

AU - Nunan, Naoise

AU - Chenu, Claire

AU - Falconer, Ruth E.

AU - Pot, Valérie

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