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Abstract
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| The sensitivity of mass fractal dimension (Dm), a spectral dimension (d), and the ratio of the two, ( d Dm ), that relates to the scaling property of dynamical processes in soil such as diffusion, to different threshold criteria was estimated. In order to do so, intact soil samples were collected from four horizons of a Brazilian soil and 3D images, of 45.1 mm resolution (256x256x256 voxels), were obtained. Four different threshold criteria were used to transform CT grey-scale imagery in binary imagery (pore/solid), based on the frequency of CT units. To compare the effect of threshold and soil horizons on the two parameters studied and its ratio, an analysis of variance was performed in a split-plot design. In this study each image is the ?main plot unit? where we have performance four determinations of the parameters. Therefore, it was considered the three locations as blocks, each horizon as main plot effect and each threshold as subplot effect. GenStat® version 12.1 was used to performance these analysis. The significance level of all the statistical analysis was at 5%. | |
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International
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Si |
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Congress
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E.G.U. 2012 9th General Assembly. |
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960 |
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Place
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Reviewers
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Si |
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ISBN/ISSN
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1029-7006 |
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Start Date
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22/04/2012 |
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End Date
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27/04/2012 |
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From page
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1 |
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To page
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1 |
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Geophysical Research Abstracts Vol. 14 |