Observatorio de I+D+i UPM

Memorias de investigación
Communications at congresses:
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
Year:2008
Research Areas
  • Chemistry,
  • Agriculture
Information
Abstract
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.
International
Si
Congress
2008 CMWR International Conference
960
Place
San Francisco, California, EE UU
Reviewers
Si
ISBN/ISSN
Start Date
06/07/2008
End Date
10/07/2008
From page
0
To page
0
Participants
  • 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)
Research Group, Departaments and Institutes related
  • 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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