Magnetic resonance imaging as a non-invasive technique for investigating 3-D preferential flow occurring within stratified soil samples
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Cited by (30)
Characterising soil physical properties of selected Temperate Highland Peat Swamps on Sandstone in the Sydney Basin Bioregion
2022, Journal of Hydrology: Regional StudiesCitation Excerpt :In this study, although signals of dual porosity were not detected in the water retention curves for any of the studied soil layers, the calculated high values for macro-pore volumes (Table 3) suggests the potential for preferential flow pathways, particularly under high rainfall events. There are different methods to identify dual porosity signals over a range of spatial scales, including non-Newtonian fluids (Atallah and Abou Najm, 2018), ground penetrating radar, fluorescent dye (Ghodrati and Jury, 1990), magnetic resonance imaging (Posadas et al., 1996), and continuous-time soil moisture measurements down the soil profile (Arnold et al., 2020). Hence, the employed laboratory analyses would benefit from complementary in-situ monitoring techniques.
Proposition for a new classification of gully erosion using multifractal and lacunarity analysis: A complex of gullies in the Palmital stream watershed, Minas Gerais (Brazil)
2020, CatenaCitation Excerpt :That is, natural fractals are so intricate that one would have difficulty measuring them in a conventional way. The fractal dimension in soil sciences has been used in different ways; the study of water flow within soil is often performed using images because of the practicability of making an assessment without interfering with the soil structure, and such studies have provided good results for the behavior of water flow (Posadas et al., 1996). On other scales, Wang et al. (2008) studied the movement of a gully head caused by water erosion and the influences of land use, and Sampaio et al. (2018) studied the fractal dimensions of entire gullies at the watershed scale.
NMR spectroscopy in environmental research: From molecular interactions to global processes
2011, Progress in Nuclear Magnetic Resonance SpectroscopyCitation Excerpt :Later, Amin and coworkers reported that water distribution in a coarse sand column involved a phenomenon known as wetting front fingering and suggested that this phenomenon took on an increasingly multifractal character with the passage of time [569]. Posadas and coworkers investigated the soil fingering phenomenon using MRI to image a double layer sand column that simulated stratified soil [570]. MRI was used to monitor the water front using spin-echo signals and phase encoding along the vertical axis.
Cadmium transport mediated by soil colloid and dissolved organic matter: A field study
2010, Journal of Environmental SciencesX-ray microtomography to investigate thin layers of soil clod
1998, Soil and Tillage Research