The Use of Gamma Ray Computed Tomography to Investigate Soil Compaction Due to Core Sampling Devices
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| Format: | Artículo científico |
| Language: | en |
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Sociedade Brasileira de Física
2004
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| _version_ | 1876460577715388416 |
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| author | Luiz F. Pires |
| author_facet | Luiz F. Pires |
| contents | The Use of Gamma Ray Computed Tomography to Investigate Soil Compaction Due to Core Sampling Devices Luiz F. Pires Robson C. J. Arthur Vladia Correchel Osny O. S. Bacchi Klaus Reichardt Rene P. Brasil Camponez do Física, Astronomía y Matemáticas Compaction processes can influence soil physical properties such as soil density, porosity, pore size distribution,and processes like soil water and nutrient movements, root system distribution, and others. Soil porositymodification has important consequences like alterations in results of soil water retention curves. These alterationsmay cause differences in soil water storage calculations and matric potential values, which are utilized inirrigation management systems. Because of this, soil-sampling techniques should avoid alterations of samplestructure. In this work soil sample compaction caused by core sampling devices was investigated using thegamma ray computed tomography technique. A first generation tomograph with fixed source-detector arrangementand translation/rotational movements of the sample was utilized to obtain the images. The radioactivesource is 241Am, with an activity of 3.7 GBq, and the detector consists of a 3 in. x 3in. NaI(Tl) scintillationcrystal coupled to a photomultiplier tube. Soil samples were taken from an experimental field utilizing cylinders4.0 cm high and 2.6 cm in diameter. Based on image analyses it was possible to detect compacted regions in allsamples next to the cylinder wall due to the sampling system. Tomographic unit profiles of the sample permittedto identify higher values of soil density for deeper regions of the sample, and it was possible to determine theaverage densities and thickness of these layers. Tomographic analyses showed to be a very useful tool for soilcompaction characterization and presented many advantages in relation to traditional methods. 2004 artículo científico 0103-9733 https://www.redalyc.org/articulo.oa?id=46434505 en http://www.redalyc.org/revista.oa?id=464 Brazilian Journal of Physics application/pdf Sociedade Brasileira de Física Brazilian Journal of Physics (Brasil) Num.3A Vol.34 |
| format | Artículo científico |
| id | redalyc_46434505 |
| institution | Redalyc |
| language | en |
| publishDate | 2004 |
| publisher | Sociedade Brasileira de Física |
| spellingShingle | The Use of Gamma Ray Computed Tomography to Investigate Soil Compaction Due to Core Sampling Devices Luiz F. Pires Física, Astronomía y Matemáticas The Use of Gamma Ray Computed Tomography to Investigate Soil Compaction Due to Core Sampling Devices Luiz F. Pires Robson C. J. Arthur Vladia Correchel Osny O. S. Bacchi Klaus Reichardt Rene P. Brasil Camponez do Física, Astronomía y Matemáticas Compaction processes can influence soil physical properties such as soil density, porosity, pore size distribution,and processes like soil water and nutrient movements, root system distribution, and others. Soil porositymodification has important consequences like alterations in results of soil water retention curves. These alterationsmay cause differences in soil water storage calculations and matric potential values, which are utilized inirrigation management systems. Because of this, soil-sampling techniques should avoid alterations of samplestructure. In this work soil sample compaction caused by core sampling devices was investigated using thegamma ray computed tomography technique. A first generation tomograph with fixed source-detector arrangementand translation/rotational movements of the sample was utilized to obtain the images. The radioactivesource is 241Am, with an activity of 3.7 GBq, and the detector consists of a 3 in. x 3in. NaI(Tl) scintillationcrystal coupled to a photomultiplier tube. Soil samples were taken from an experimental field utilizing cylinders4.0 cm high and 2.6 cm in diameter. Based on image analyses it was possible to detect compacted regions in allsamples next to the cylinder wall due to the sampling system. Tomographic unit profiles of the sample permittedto identify higher values of soil density for deeper regions of the sample, and it was possible to determine theaverage densities and thickness of these layers. Tomographic analyses showed to be a very useful tool for soilcompaction characterization and presented many advantages in relation to traditional methods. 2004 artículo científico 0103-9733 https://www.redalyc.org/articulo.oa?id=46434505 en http://www.redalyc.org/revista.oa?id=464 Brazilian Journal of Physics application/pdf Sociedade Brasileira de Física Brazilian Journal of Physics (Brasil) Num.3A Vol.34 |
| title | The Use of Gamma Ray Computed Tomography to Investigate Soil Compaction Due to Core Sampling Devices |
| topic | Física, Astronomía y Matemáticas |
| url | https://www.redalyc.org/articulo.oa?id=46434505 |