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Mathieu Lamandé

Linking air and water transport in intact soils to macro-porosity by combining laboratory measurements and X-ray Computed Tomography

Research output: Contribution to conferenceConference abstract for conferenceResearch

Standard

Linking air and water transport in intact soils to macro-porosity by combining laboratory measurements and X-ray Computed Tomography. / Katuwal, Sheela; Norgaard, Trine; Møldrup, Per; Lamandé, Mathieu; Wildenschild, Dorthe ; de Jonge, Lis Wollesen.

2012. Abstract from ASA, CSSA and SSSA International Annual Meetings, Cincinnati, Ohio, United States.

Research output: Contribution to conferenceConference abstract for conferenceResearch

Harvard

Katuwal, S, Norgaard, T, Møldrup, P, Lamandé, M, Wildenschild, D & de Jonge, LW 2012, 'Linking air and water transport in intact soils to macro-porosity by combining laboratory measurements and X-ray Computed Tomography', ASA, CSSA and SSSA International Annual Meetings, Cincinnati, Ohio, United States, 21/10/2012 - 24/10/2012.

APA

Katuwal, S., Norgaard, T., Møldrup, P., Lamandé, M., Wildenschild, D., & de Jonge, L. W. (2012). Linking air and water transport in intact soils to macro-porosity by combining laboratory measurements and X-ray Computed Tomography. Abstract from ASA, CSSA and SSSA International Annual Meetings, Cincinnati, Ohio, United States.

CBE

Katuwal S, Norgaard T, Møldrup P, Lamandé M, Wildenschild D, de Jonge LW. 2012. Linking air and water transport in intact soils to macro-porosity by combining laboratory measurements and X-ray Computed Tomography. Abstract from ASA, CSSA and SSSA International Annual Meetings, Cincinnati, Ohio, United States.

MLA

Katuwal, Sheela et al. Linking air and water transport in intact soils to macro-porosity by combining laboratory measurements and X-ray Computed Tomography. ASA, CSSA and SSSA International Annual Meetings, 21 Oct 2012, Cincinnati, Ohio, United States, Conference abstract for conference, 2012. 2 p.

Vancouver

Katuwal S, Norgaard T, Møldrup P, Lamandé M, Wildenschild D, de Jonge LW. Linking air and water transport in intact soils to macro-porosity by combining laboratory measurements and X-ray Computed Tomography. 2012. Abstract from ASA, CSSA and SSSA International Annual Meetings, Cincinnati, Ohio, United States.

Author

Katuwal, Sheela ; Norgaard, Trine ; Møldrup, Per ; Lamandé, Mathieu ; Wildenschild, Dorthe ; de Jonge, Lis Wollesen. / Linking air and water transport in intact soils to macro-porosity by combining laboratory measurements and X-ray Computed Tomography. Abstract from ASA, CSSA and SSSA International Annual Meetings, Cincinnati, Ohio, United States.2 p.

Bibtex

@conference{8709165d9fcf4ff49acd7448421c592d,
title = "Linking air and water transport in intact soils to macro-porosity by combining laboratory measurements and X-ray Computed Tomography",
abstract = "With an objective to link the hydraulic properties of soil with the soil structural properties, air permeability and 5% arrival time of a conservative tracer was measured for large undisturbed soil columns from the same agricultural field. The same soil columns were scanned with a medical scanner from which macropores present in each of the soil column could be reconstructed and quantified after processing of the images. From the images, the total macro-porosity in a soil column and macro-porosity of the restricting layer (limiting quarter) for each sample were quantified and correlated with air permeability and 5% arrival time. Even in the same field high variability in air permeability, ranging from 4.66 to 78.10 µm2, and 5% arrival time of tracer (0.07 to 2.36 h) were observed between the samples. Both air permeability and 5% arrival time of tracer were strongly correlated with macro-porosity (R2 = 0.80 for air permeability: R2= 0.61 for 5% arrival time) and macro-porosity of the restricting layer (R2=0.83 for air permeability: R2= 0.71 for 5% arrival time) over air-filled porosity and all the correlations were positive. The high positive correlation these air and water transport functions with macro-porosity stressed the importance of continuity and tortuosity of pores in air, water and solute flow and transport through the soils. Negative correlations of air permeability, 5% arrival time of tracer and macro-porosity were obtained with bulk density whereas with other soil physical properties such as clay, sand and organic matter content they were only weakly correlated. From the study it was found that quantification of pore characteristics is important in understanding the flow and transport behavior of soils but proper quantification of the much easily measurable macro-porosity is more important.",
author = "Sheela Katuwal and Trine Norgaard and Per M{\o}ldrup and Mathieu Lamand{\'e} and Dorthe Wildenschild and {de Jonge}, {Lis Wollesen}",
year = "2012",
language = "English",
note = "null ; Conference date: 21-10-2012 Through 24-10-2012",

}

RIS

TY - ABST

T1 - Linking air and water transport in intact soils to macro-porosity by combining laboratory measurements and X-ray Computed Tomography

AU - Katuwal, Sheela

AU - Norgaard, Trine

AU - Møldrup, Per

AU - Lamandé, Mathieu

AU - Wildenschild, Dorthe

AU - de Jonge, Lis Wollesen

PY - 2012

Y1 - 2012

N2 - With an objective to link the hydraulic properties of soil with the soil structural properties, air permeability and 5% arrival time of a conservative tracer was measured for large undisturbed soil columns from the same agricultural field. The same soil columns were scanned with a medical scanner from which macropores present in each of the soil column could be reconstructed and quantified after processing of the images. From the images, the total macro-porosity in a soil column and macro-porosity of the restricting layer (limiting quarter) for each sample were quantified and correlated with air permeability and 5% arrival time. Even in the same field high variability in air permeability, ranging from 4.66 to 78.10 µm2, and 5% arrival time of tracer (0.07 to 2.36 h) were observed between the samples. Both air permeability and 5% arrival time of tracer were strongly correlated with macro-porosity (R2 = 0.80 for air permeability: R2= 0.61 for 5% arrival time) and macro-porosity of the restricting layer (R2=0.83 for air permeability: R2= 0.71 for 5% arrival time) over air-filled porosity and all the correlations were positive. The high positive correlation these air and water transport functions with macro-porosity stressed the importance of continuity and tortuosity of pores in air, water and solute flow and transport through the soils. Negative correlations of air permeability, 5% arrival time of tracer and macro-porosity were obtained with bulk density whereas with other soil physical properties such as clay, sand and organic matter content they were only weakly correlated. From the study it was found that quantification of pore characteristics is important in understanding the flow and transport behavior of soils but proper quantification of the much easily measurable macro-porosity is more important.

AB - With an objective to link the hydraulic properties of soil with the soil structural properties, air permeability and 5% arrival time of a conservative tracer was measured for large undisturbed soil columns from the same agricultural field. The same soil columns were scanned with a medical scanner from which macropores present in each of the soil column could be reconstructed and quantified after processing of the images. From the images, the total macro-porosity in a soil column and macro-porosity of the restricting layer (limiting quarter) for each sample were quantified and correlated with air permeability and 5% arrival time. Even in the same field high variability in air permeability, ranging from 4.66 to 78.10 µm2, and 5% arrival time of tracer (0.07 to 2.36 h) were observed between the samples. Both air permeability and 5% arrival time of tracer were strongly correlated with macro-porosity (R2 = 0.80 for air permeability: R2= 0.61 for 5% arrival time) and macro-porosity of the restricting layer (R2=0.83 for air permeability: R2= 0.71 for 5% arrival time) over air-filled porosity and all the correlations were positive. The high positive correlation these air and water transport functions with macro-porosity stressed the importance of continuity and tortuosity of pores in air, water and solute flow and transport through the soils. Negative correlations of air permeability, 5% arrival time of tracer and macro-porosity were obtained with bulk density whereas with other soil physical properties such as clay, sand and organic matter content they were only weakly correlated. From the study it was found that quantification of pore characteristics is important in understanding the flow and transport behavior of soils but proper quantification of the much easily measurable macro-porosity is more important.

M3 - Conference abstract for conference

Y2 - 21 October 2012 through 24 October 2012

ER -