Ponencias en congresos:
Macroporosity of 2-D cross sections of soil columns via X-ray CT: multifractal statistics and long range correlations for assessing 3-D soil pore structure
Macroporosity of 2-D cross sections of soil columns via X-ray CT: multifractal statistics and long range correlations for assessing 3-D soil pore structure
Año:2008
Áreas de investigación
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Química, -
Agricultura
Datos
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Descripción
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| The objective of this work was to develop the multifractal description of soil porosity values (2-D sectional porosities) as a function of depth with data from binarized 2-D images that were obtained from X-ray CT scans of 12 water-saturated 20 cm-long soil columns with diameters of 7.5 cm. A reconstruction algorithm was applied to convert the X-ray CT data into a stack of 1480 grayscale digital images with a voxel resolution of 110 microns and a cross-sectional size of 690x690 pixels. The series corresponding to the percentage of void space of the sectional binarized images were recorded. These series of depth-dependent macroporosity values exhibited a well defined multifractal structure that was represented by the singularity and the Rényi spectra. We also parameterized the memory, or long range dependencies, in these series using the Hurst exponent and the multifractal model. The distinct behavior of each porosity series may be associated with pore connectivity and furthermore, correlated with hydraulic soil properties. The obtained multifractal spectra were consistent with multinomial multifractal measures where larger concentrations were less diverse but more common than the smaller ones. | |
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Internacional
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Si |
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Nombre congreso
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2008 CMWR International Conference |
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Tipo de participación
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960 |
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Lugar del congreso
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San Francisco, California, EE UU |
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Revisores
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ISBN o ISSN
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DOI
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Fecha inicio congreso
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06/07/2008 |
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Fecha fin congreso
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10/07/2008 |
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Participantes
- Participante: Andrey Guber (USDA-BARC-EMSL)
- Participante: Markus Tuller (Universidad de Arizona, EEUU)
- Autor: Francisco Javier Caniego Monreal (UPM)
- Autor: Miguel Angel Martin Martin (UPM)
- Participante: Yakov Pakepsky (USDA-BARC-EMSL)
- Autor: Fernando San Jose Martinez (UPM)
- Autor: Carlos Garcia-Gutierrez Baez (UPM)
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
- Creador: Grupo de Investigación: Fractales y Aplicaciones en Ciencias del Suelo y Medioambientales (PEDOFRACT)
- Departamento: Matemática Aplicada a la Ingeniería Agronómica
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