Evaluation of CO2 fluxes from an agricultural field using a process-based numerical model

Buchner, Jens S.; Šimůnek, Jiřı́; Lee, Juhwan; Rolston, Dennis E.; Hopmans, Jan W.; King, Amy P.; Six, Johan

doi:10.1016/j.jhydrol.2008.07.035

Cited by 23 publications

(18 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The volumetric heat capacity, C s (M/L/T 2 /K), of solid was then calculated as follows: Buchner et al 2008;Sakai et al 2011;Bauer et al 2012;Votrubová et al 2012).…”

Section: Methodsmentioning

confidence: 99%

Thermal properties of representative soils of the Czech Republic

et al. 2013

View full text Add to dashboard Cite

Kodešová R., Vlasáková M., Fér M., Teplá D., Jakšík O., Neuberger P., Adamovský R. (2013) Knowledge of soil thermal properties is essential when assessing heat transport in soils. Thermal regime of soils is associated with many other soil processes (water evaporation and diffusion, plant transpiration, contaminants behaviour etc.). Knowledge of thermal properties is needed when assessing effectivity of energy gathering from soil profiles using horizontal ground heat exchangers, which is a topic of our research project. The study is focused on measuring of thermal properties (thermal conductivity and heat capacity) of representative soils of the Czech Republic. Measurements were performed on soil samples taken from the surface horizons of 13 representative soil types and from 4 soil substrates, and on mulch (bark chips) sample using KD2 PRO device with TR-1 and SH-1 sensors. The measured relationships between the thermal conductivity and volumetric soil-water content were described by the non-linear equations and those between the volumetric heat capacity and volumetric soil-water content were expressed using the linear equations. The highest thermal conductivities were measured in soils on quartz sand substrates. The lowest thermal conductivities were measured in the Stagnic Chernozem Siltic on marlite and the Dystric Cambisol on orthogneiss. The opposite trend was observed for maximal heat capacities, i.e. the highest values were measured in the Stagnic Chernozem Siltic and the lowest in sand and soils on sand and sandy gravel substrate.

show abstract

“…The volumetric heat capacity, C s (M/L/T 2 /K), of solid was then calculated as follows: Buchner et al 2008;Sakai et al 2011;Bauer et al 2012;Votrubová et al 2012).…”

Section: Methodsmentioning

confidence: 99%

Thermal properties of representative soils of the Czech Republic

et al. 2013

View full text Add to dashboard Cite

show abstract

“…Thus the soil heat transport simulation is becoming an integral part of models describing diverse phenomena: the land surface influence on climate and meteorological conditions (Loukili et al 2008), crop growth (Timlin et al 2002), soil CO 2 production (Buchner et al 2008;Bauer et al 2012), ecosystem carbon sequestration (Ju et al 2006), or subsurface soil water evaporation (Sakai et al 2011). The coupled soil water and heat transport modelling was also used to improve the understanding of hydraulic processes below the land surface (Ronan et al 1998;Vogel et al 2011).…”

mentioning

confidence: 99%

“…In many studies (Buchner et al 2008;Bauer et al 2012;Sakai et al 2011) the λ(θ) relationships published by Chung and Horton (1987) are employed; even though they were introduced as λ(θ) approximations for the three soils studied, not as estimates to be used for different soils. The λ(θ) estimation methods assess the soil thermal conductivity in dry and saturated soil conditions using the basic knowledge of the soil composition, and then approximate the shape of the λ(θ) relationship.…”

mentioning

confidence: 99%

On parameterization of heat conduction in coupled soil water and heat flow modelling

et al. 2012

View full text Add to dashboard Cite

Soil water and heat transport plays an important role in various hydrologic, agricultural, and industrial applications. Accordingly, an increasing attention is paid to relevant simulation models. In the present study, soil thermal conditions at a mountain meadow during the vegetation season were simulated. A dual-continuum model of coupled water and heat transport was employed to account for preferential flow effects. Data collected at an experimental site in the Šumava Mountains, southern Bohemia, during the vegetation season 2009 were employed. Soil hydraulic properties (retention curve and hydraulic conductivity) determined by independent soil tests were used. Unavailable hydraulic parameters were adjusted to obtain satisfactory hydraulic model performance. Soil thermal properties were estimated based on values found in literature without further optimization. Three different approaches were used to approximate the soil thermal conductivity function, λ(θ): (i) relationships provided by Chung and Horton (ii) linear estimates as described by Loukili, Woodbury and Snelgrove, (iii) methodology proposed by Côté and Konrad. The simulated thermal conditions were compared to those observed. The impact of different soil thermal conductivity approximations on the heat transport simulation results was analysed. The differences between the simulation results in terms of the soil temperature were small. Regarding the surface soil heat flux, these differences became substantial. More realistic simulations were obtained using λ(θ) estimates based on the soil texture and composition. The differences between these two, related to neglecting vs. considering λ(θ) non-linearity, were found negligible.

show abstract

“…The coupled program was obtained by combining various features from SOILCO2 (i.e., water flow, heat transport, and CO 2 transport) and UNSATCHEM (major ion chemistry) within a new module within HYDRUS-1D. The resulting module of HYDRUS-1D has seen several applications recently to lysimeter and field data (e.g., Bauer et al 2008;Herbst et al 2008;Buchner et al 2008). Results from one application by Buchner et al (2008) are shown in Fig.…”

Section: The Soilco 2 Module Of Hydrus-1dmentioning

confidence: 99%

Selected HYDRUS modules for modeling subsurface flow and contaminant transport as influenced by biological processes at various scales

et al. 2009

View full text Add to dashboard Cite

A large number of modifications or special modules of the HYDRUS software packages have been developed during the past several years to evaluate the effects of a range of biohydrological processes on subsurface water flow and the transport of various chemicals and contaminants. The objective of this manuscript is to briefly review the different modules that were included, and to present various applications illustrating the effects of biological processes on water flow and solute transport and reactions in variably-saturated media.

show abstract

Evaluation of CO2 fluxes from an agricultural field using a process-based numerical model

Cited by 23 publications

References 32 publications

Thermal properties of representative soils of the Czech Republic

Thermal properties of representative soils of the Czech Republic

On parameterization of heat conduction in coupled soil water and heat flow modelling

Selected HYDRUS modules for modeling subsurface flow and contaminant transport as influenced by biological processes at various scales

Contact Info

Product

Resources

About