- Tytuł:
- Gamma-ray computed tomography as a tool to evaluate porosity changes along depth for surface crusted soils
- Autorzy:
-
Pires, L. F.
Bacchi, O. O. S.
Reichardt, K.
Dias, N. M. P. - Powiązania:
- https://bibliotekanauki.pl/articles/146838.pdf
- Data publikacji:
- 2007
- Wydawca:
- Instytut Chemii i Techniki Jądrowej
- Tematy:
-
gamma-ray attenuation
soil density
soil structure
soil surface sealing
241 Am
applied nuclear physics
gamma tomography - Opis:
- Assessment of changes in porosity (ö) 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 nondestructive, sensitive, and rapid manner. CT data can be used for measuring at a millimetric scale changes in ö 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 ö distribution of each layer it was possible to show that the sealed surface layer presented ö 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.
- Źródło:
-
Nukleonika; 2007, 52, 3; 125-131
0029-5922
1508-5791 - Pojawia się w:
- Nukleonika
- Dostawca treści:
- Biblioteka Nauki
Artykuł