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- W2154413014 abstract "Assessment of changes in porosity (φ) along depth for soils with surface crusting is difficult because conventional soil physical investigation tools are destructive and usually require a long period of time for preparation and analysis of the samples. Computed tomography (CT) has frequently been used as a method to evaluate soil structure in a non- destructive, sensitive, and rapid manner. CT data can be used for measuring at a millimetric scale changes in φ along depth for soils with surface crusting. The main objective of this work was to investigate the sensibility of the gamma-ray CT to assess soil structural changes along depth in samples presenting structural crust. CT images were taken with a first generation scanner of 1.14 mm resolution along eight different soil layers within the 0−28 mm depth. Porosity increased along depth up to the 14−17.5 mm layer. Through the analysis of the φ distribution of each layer it was possible to show that the sealed surface layer presented φ values of approximately 30%, while the other layers were greater than 30% up to 60% (macropore regions). The sealing crust thickness was estimated to be in the range of 2.3−3.5 mm." @default.
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- W2154413014 date "2007-01-01" @default.
- W2154413014 modified "2023-09-23" @default.
- W2154413014 title "Gamma-ray computed tomography as a tool to evaluate porosity changes along depth for surface crusted soils" @default.
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