Gamma ray transmission for hydraulic conductivity measurement of undisturbed soil columns

Moreira, Anderson Camargo; Filho, Otávio Portezan; Cavalcante, Fábio Henrique Moraes; Coimbra, M.M.; Appoloni, Carlos Roberto

doi:10.1590/s1516-89132007000200017

Cited by 6 publications

(3 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Measurements accomplished in the laboratory usually employ samples of disturbed and undisturbed soils. Soil samples can be scanned by a mono or dual energy gamma beam for the bulk density and wetting study [2].…”

Section: Dual-energy Methodologymentioning

confidence: 99%

See 1 more Smart Citation

Using the Dual Energy Gamma-Ray Transmission Technique to Measure Soil Bulk Density and Water Content of Central Southwestern Nigerian Soils

Adejumo¹,

Balogun²

2012

JEP

View full text Add to dashboard Cite

In this work, a radiological technique which simultaneously measures soil bulk density and water contents accurately and quickly in a non-destructive manner at different depths of the soil profile of the major soil series of Central Southwestern Nigeria is developed. Undisturbed samples from Iwo, Ondo, Egbeda, Itagunmodi, Okemessi, Mamu, Origo and Jago soil series of Southwestern Nigeria were collected on monthly intervals from June 2006 to May 2007. Using gamma-ray energy pairs of 122 and 1112 keV; and 344 and 1408 keV obtained from europium-152 (¹⁵²Eu) radionuclide, the attenuation coefficients for soil and water, μ_s, μ_w and consequently ρ_s and θ_v at varying soil depths of these series were calculated. Comparative gravimetric measurements of these soil parameters were carried out. Using the XCOM computer algorithm with the soil elemental concentrations obtained using the Energy Dispersive X-Ray Fluorescence analysis (EDXRF) technique, theoretical estimates of μ_s for the various soil series were obtained and compared with the experimental values. The result of the developed dual energy gamma-ray transmission technique was compared with the gravimetric measurement method and Pearson correlation coefficient (0.987, p < 0.001) was obtained for ρ_s and (0.996, p < 0.001) for θ_v. The results of the measurements showed that θ_v minima with values 0.1931, 0.1987, 0.2377, 0.2111, 0.1738, 0.1701, 0.2334, 0.2341 and minima ρ_s values of 1.21 g/cm³, 1.20 g/cm³, 1.02 g/cm³, 1.38 g/cm³, 1.12 g/cm³, 1.14 g/cm³, 0.64 g/cm³, 1.33 g/cm3 were obtained respectively for the soil series stated above in January. The maxima θ_v with values 0.3621, 0.4212, 0.3962, 0.3794, 0.3049, 0.2811, 0.4415, 0.4416 and maxima ρ_s values of 1.52 g/cm³, 1.67 g/cm³, 1.74 g/cm³, 1.69 g/cm³, 1.70 g/cm³, 1.68 g/cm³, 1.08 g/cm³, 1.54 g/cm³ occurred for these soil series respectively in July except for Mamu soil series which occurred in May. These correlated very well with the occurrence of the Dry and Rainy seasons in the study area. The results of the EDXRF analysis showed that maxima Iron, Fe concentrations of 5.0890 ppm at the depth of 90 - 120 cm into the soil profile, was obtained for Iwo series, 4.4691 ppm at 50 - 70 cm for Ondo, 6.3438 ppm at 15 - 30 cm for Egbeda, 6.6845 ppm at 30 - 50 cm for Itagunmodi, 5.0252 ppm at 90 - 120 cm for Okemessi, 3.4996 ppm at 30 - 50 cm for Mamu, 5.1191 ppm at 50 - 70 cm for Jago and 4.7193 ppm at 90 - 120 cm for Origo. Maxima Potassium, K concentrations of 2.9613 ppm at the depth of 50 - 70 cm, was obtained for Iwo soil series, 2.3315 ppm at 0 - 15 cm for Egbeda, 2.2763 ppm at 70 - 90 cm for Okemessi and 3.3636 ppm at 50 - 70 cm for Mamu. Maxima Ti concentrations of 1.4822 ppm at ...

show abstract

Section: Dual-energy Methodologymentioning

confidence: 99%

“…the subscripts 1 and 2 refer to the low and higher gammaray energies respectively. The exponents of Equations (2) and 3 ln ln…”

Section: Dual-energy Methodologymentioning

confidence: 99%

Using the Dual Energy Gamma-Ray Transmission Technique to Measure Soil Bulk Density and Water Content of Central Southwestern Nigerian Soils

Adejumo¹,

Balogun²

2012

JEP

View full text Add to dashboard Cite

show abstract

“…The main difference between gamma rays and X-rays is their origin, where gamma rays are emitted by the nucleus, whilst electrons orbiting the nucleus emit X-rays [ 258 ]. Single or dual energy gamma rays, as a non-invasive and non-destructive method, can be used for studying the bulk density and wettability of rock and soil samples [ 259 , 260 , 261 , 262 ]. Single energy gamma rays was used by Ursin [ 263 ] to obtain the local water saturation over a cross-sectional area in two-phase flow experiments performed on a heterogeneous porous medium of unconsolidated glass powder.…”

Section: Imaging Techniquesmentioning

confidence: 99%

Review of Microfluidic Devices and Imaging Techniques for Fluid Flow Study in Porous Geomaterials

Jahanbakhsh

Wlodarczyk

Hand

et al. 2020

Sensors

View full text Add to dashboard Cite

Understanding transport phenomena and governing mechanisms of different physical and chemical processes in porous media has been a critical research area for decades. Correlating fluid flow behaviour at the micro-scale with macro-scale parameters, such as relative permeability and capillary pressure, is key to understanding the processes governing subsurface systems, and this in turn allows us to improve the accuracy of modelling and simulations of transport phenomena at a large scale. Over the last two decades, there have been significant developments in our understanding of pore-scale processes and modelling of complex underground systems. Microfluidic devices (micromodels) and imaging techniques, as facilitators to link experimental observations to simulation, have greatly contributed to these achievements. Although several reviews exist covering separately advances in one of these two areas, we present here a detailed review integrating recent advances and applications in both micromodels and imaging techniques. This includes a comprehensive analysis of critical aspects of fabrication techniques of micromodels, and the most recent advances such as embedding fibre optic sensors in micromodels for research applications. To complete the analysis of visualization techniques, we have thoroughly reviewed the most applicable imaging techniques in the area of geoscience and geo-energy. Moreover, the integration of microfluidic devices and imaging techniques was highlighted as appropriate. In this review, we focus particularly on four prominent yet very wide application areas, namely “fluid flow in porous media”, “flow in heterogeneous rocks and fractures”, “reactive transport, solute and colloid transport”, and finally “porous media characterization”. In summary, this review provides an in-depth analysis of micromodels and imaging techniques that can help to guide future research in the in-situ visualization of fluid flow in porous media.

show abstract

Optimizing vertical profile measurements setup of gamma ray attenuation

Mayar

Schmid

Wieprecht

et al. 2019

Radiation Physics and Chemistry

View full text Add to dashboard Cite

Gamma ray transmission for hydraulic conductivity measurement of undisturbed soil columns

Cited by 6 publications

References 11 publications

Using the Dual Energy Gamma-Ray Transmission Technique to Measure Soil Bulk Density and Water Content of Central Southwestern Nigerian Soils

Using the Dual Energy Gamma-Ray Transmission Technique to Measure Soil Bulk Density and Water Content of Central Southwestern Nigerian Soils

Review of Microfluidic Devices and Imaging Techniques for Fluid Flow Study in Porous Geomaterials

Optimizing vertical profile measurements setup of gamma ray attenuation

Contact Info

Product

Resources

About