Water and solute transport in agricultural soils predicted by volumetric clay and silt contents

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Water and solute transport in agricultural soils predicted by volumetric clay and silt contents. / Karup, Dan; Møldrup, Per; Paradelo Pérez, Marcos; Katuwal, Sheela; Nørgaard, Trine; Greve, Mogens Humlekrog; de Jonge, Lis Wollesen.

In: Journal of Contaminant Hydrology, Vol. 192, 2016, p. 194-202.

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articleResearchpeer-review

Harvard

Karup, D, Møldrup, P, Paradelo Pérez, M, Katuwal, S, Nørgaard, T, Greve, MH & de Jonge, LW 2016, 'Water and solute transport in agricultural soils predicted by volumetric clay and silt contents', Journal of Contaminant Hydrology, vol. 192, pp. 194-202. https://doi.org/10.1016/j.jconhyd.2016.08.001

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MLA

Vancouver

Karup D, Møldrup P, Paradelo Pérez M, Katuwal S, Nørgaard T, Greve MH et al. Water and solute transport in agricultural soils predicted by volumetric clay and silt contents. Journal of Contaminant Hydrology. 2016;192:194-202. https://doi.org/10.1016/j.jconhyd.2016.08.001

Author

Karup, Dan ; Møldrup, Per ; Paradelo Pérez, Marcos ; Katuwal, Sheela ; Nørgaard, Trine ; Greve, Mogens Humlekrog ; de Jonge, Lis Wollesen. / Water and solute transport in agricultural soils predicted by volumetric clay and silt contents. In: Journal of Contaminant Hydrology. 2016 ; Vol. 192. pp. 194-202.

Bibtex

@article{5738914035c84f01ad9286966080ae7c,
title = "Water and solute transport in agricultural soils predicted by volumetric clay and silt contents",
abstract = "Solute transport through the soil matrix is heterogeneous andgreatly affected by soil texture, soil structure, and macropore networks.This study examined the relationship between tracer breakthroughcharacteristics, soil hydraulic properties, and basic soil properties.Hundred-and-eighty-seven undisturbed soil columns 20 cm in height and 20cm in diameter were sampled from six conventionally managed agriculturalfields in Denmark. The soils exhibited a wide range in texture, with claycontents and organic carbon (OC) contents ranging from 0.03 to 0.41 kgkg-1 and 0.01 to 0.08 kg kg-1, respectively. All experiments were carriedout under the same initial and boundary conditions using tritium as aconservative tracer. The breakthrough characteristics ranged from beingnormally distributed to having more preferential characteristics alongwith an increase in the content of the mineral fines (particles ≤ 50 μm).The results showed that the mineral fines content was strongly correlatedto functional soil structure and the derived tracer breakthrough curve(BTC), whereas the OC content appeared less important for the shape ofthe BTC. Organic carbon was believed to support the stability of the soilstructure rather than the actual formation of macropores causingpreferential flow. The arrival times of 5 {\%} and up to 50 {\%} of the tracermass were found to be strongly correlated with volumetric fines content.The hereby predicted tracer concentration breakthrough points up to 50{\%}of applied tracer mass could be well fitted to an analytical solution tothe classical convection-dispersion equation. Both cumulative tracer massand concentration as a function of time were hereby reasonable wellpredicted from the simple inputs of bulk density, clay and silt contents,and applied tracer mass. The new concept seems promising as a platformtowards more accurate proxy functions for dissolved contaminant transportin intact soil.",
author = "Dan Karup and Per M{\o}ldrup and {Paradelo P{\'e}rez}, Marcos and Sheela Katuwal and Trine N{\o}rgaard and Greve, {Mogens Humlekrog} and {de Jonge}, {Lis Wollesen}",
year = "2016",
doi = "10.1016/j.jconhyd.2016.08.001",
language = "English",
volume = "192",
pages = "194--202",
journal = "Journal of Contaminant Hydrology",
issn = "0169-7722",
publisher = "Elsevier BV",

}

RIS

TY - JOUR

T1 - Water and solute transport in agricultural soils predicted by volumetric clay and silt contents

AU - Karup, Dan

AU - Møldrup, Per

AU - Paradelo Pérez, Marcos

AU - Katuwal, Sheela

AU - Nørgaard, Trine

AU - Greve, Mogens Humlekrog

AU - de Jonge, Lis Wollesen

PY - 2016

Y1 - 2016

N2 - Solute transport through the soil matrix is heterogeneous andgreatly affected by soil texture, soil structure, and macropore networks.This study examined the relationship between tracer breakthroughcharacteristics, soil hydraulic properties, and basic soil properties.Hundred-and-eighty-seven undisturbed soil columns 20 cm in height and 20cm in diameter were sampled from six conventionally managed agriculturalfields in Denmark. The soils exhibited a wide range in texture, with claycontents and organic carbon (OC) contents ranging from 0.03 to 0.41 kgkg-1 and 0.01 to 0.08 kg kg-1, respectively. All experiments were carriedout under the same initial and boundary conditions using tritium as aconservative tracer. The breakthrough characteristics ranged from beingnormally distributed to having more preferential characteristics alongwith an increase in the content of the mineral fines (particles ≤ 50 μm).The results showed that the mineral fines content was strongly correlatedto functional soil structure and the derived tracer breakthrough curve(BTC), whereas the OC content appeared less important for the shape ofthe BTC. Organic carbon was believed to support the stability of the soilstructure rather than the actual formation of macropores causingpreferential flow. The arrival times of 5 % and up to 50 % of the tracermass were found to be strongly correlated with volumetric fines content.The hereby predicted tracer concentration breakthrough points up to 50%of applied tracer mass could be well fitted to an analytical solution tothe classical convection-dispersion equation. Both cumulative tracer massand concentration as a function of time were hereby reasonable wellpredicted from the simple inputs of bulk density, clay and silt contents,and applied tracer mass. The new concept seems promising as a platformtowards more accurate proxy functions for dissolved contaminant transportin intact soil.

AB - Solute transport through the soil matrix is heterogeneous andgreatly affected by soil texture, soil structure, and macropore networks.This study examined the relationship between tracer breakthroughcharacteristics, soil hydraulic properties, and basic soil properties.Hundred-and-eighty-seven undisturbed soil columns 20 cm in height and 20cm in diameter were sampled from six conventionally managed agriculturalfields in Denmark. The soils exhibited a wide range in texture, with claycontents and organic carbon (OC) contents ranging from 0.03 to 0.41 kgkg-1 and 0.01 to 0.08 kg kg-1, respectively. All experiments were carriedout under the same initial and boundary conditions using tritium as aconservative tracer. The breakthrough characteristics ranged from beingnormally distributed to having more preferential characteristics alongwith an increase in the content of the mineral fines (particles ≤ 50 μm).The results showed that the mineral fines content was strongly correlatedto functional soil structure and the derived tracer breakthrough curve(BTC), whereas the OC content appeared less important for the shape ofthe BTC. Organic carbon was believed to support the stability of the soilstructure rather than the actual formation of macropores causingpreferential flow. The arrival times of 5 % and up to 50 % of the tracermass were found to be strongly correlated with volumetric fines content.The hereby predicted tracer concentration breakthrough points up to 50%of applied tracer mass could be well fitted to an analytical solution tothe classical convection-dispersion equation. Both cumulative tracer massand concentration as a function of time were hereby reasonable wellpredicted from the simple inputs of bulk density, clay and silt contents,and applied tracer mass. The new concept seems promising as a platformtowards more accurate proxy functions for dissolved contaminant transportin intact soil.

U2 - 10.1016/j.jconhyd.2016.08.001

DO - 10.1016/j.jconhyd.2016.08.001

M3 - Journal article

C2 - 27509309

VL - 192

SP - 194

EP - 202

JO - Journal of Contaminant Hydrology

JF - Journal of Contaminant Hydrology

SN - 0169-7722

ER -