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Abstract:

We obtain the transverse electric (TE) and transverse magnetic (TM) Fresnel reflection coefficients for different interfaces in the subsoil: air/fresh-water, air/seawater, fresh-water/seawater, air/NAPL (non-aqueous phase liquid), NAPL/water and water/NAPL. We consider a range of NAPL saturations, where the complementary fluid is water with 0.65 ppt (parts per thousand) of NaCl. The common feature is that the TM mode (parallel polarization) has a negative anomaly and the TE mode (perpendicular polarization) has a positive anomaly. For the cases studied in this work, pseudo-Brewster angles appear beyond 40° for the air/NAPL and NAPL/water interfaces and at near offsets (below 40°) for the water/NAPL interface. Pseudo-critical angles are present for the water/NAPL interface. Besides the reflection strength, the phase angle can be used to discriminate between low- and high-conductivity NAPL, when the properties of the upper medium are known. A wavenumber-frequency domain method is used to compute the reflection coefficient and phase angle from synthetic radargrams. This method and the curves can be used to interpret the amplitude variations with angle (AVA) of reflection events in radargrams obtained with ground-penetrating radar (GPR). © 2006 European Association of Geoscientists & Engineers.

Registro:

Documento: Artículo
Título:Fresnel reflection coefficients for GPR-AVA analysis and detection of seawater and NAPL contaminants
Autor:Carcione, J.M.; Gei, D.; Botelho, M.A.B.; Osella, A.; de la Vega, M.
Filiación:Istituto Nazionale di Oceanografia e di Geofisica Sperimentale, Borgo Grotta Gigante 42c, 34010 Sgonico, Trieste, Italy
Instituto de Geosciěncias, Universidade Federal da Bahia, Campus Universitario de Ondina, Salvador-BA, Brazil
Departamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Pab. 1, 1428 Buenos Aires, Argentina
Año:2006
Volumen:4
Número:4
Página de inicio:253
Página de fin:263
Título revista:Near Surface Geophysics
Título revista abreviado:Near Surf. GeoPhys.
ISSN:15694445
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15694445_v4_n4_p253_Carcione

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Citas:

---------- APA ----------
Carcione, J.M., Gei, D., Botelho, M.A.B., Osella, A. & de la Vega, M. (2006) . Fresnel reflection coefficients for GPR-AVA analysis and detection of seawater and NAPL contaminants. Near Surface Geophysics, 4(4), 253-263.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15694445_v4_n4_p253_Carcione [ ]
---------- CHICAGO ----------
Carcione, J.M., Gei, D., Botelho, M.A.B., Osella, A., de la Vega, M. "Fresnel reflection coefficients for GPR-AVA analysis and detection of seawater and NAPL contaminants" . Near Surface Geophysics 4, no. 4 (2006) : 253-263.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15694445_v4_n4_p253_Carcione [ ]
---------- MLA ----------
Carcione, J.M., Gei, D., Botelho, M.A.B., Osella, A., de la Vega, M. "Fresnel reflection coefficients for GPR-AVA analysis and detection of seawater and NAPL contaminants" . Near Surface Geophysics, vol. 4, no. 4, 2006, pp. 253-263.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15694445_v4_n4_p253_Carcione [ ]
---------- VANCOUVER ----------
Carcione, J.M., Gei, D., Botelho, M.A.B., Osella, A., de la Vega, M. Fresnel reflection coefficients for GPR-AVA analysis and detection of seawater and NAPL contaminants. Near Surf. GeoPhys. 2006;4(4):253-263.
Available from: https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15694445_v4_n4_p253_Carcione [ ]