Pedogeochemical models on prognosis and control of radon fluxes from humid tropical landscapes over granite
Abstract The principal relationships between radon (222Rn and 220Rn) exhalation intensities and the morpho-dynamic elements of humid tropical landscapes have been established and analyzed with the objective of elaborating Rn exhalation models, which can be used on the scale of small habitational nuc...
Ausführliche Beschreibung
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| Autor*in: |
Rebelo, A. M. A. [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2003 |
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| Schlagwörter: |
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| Anmerkung: |
© Springer-Verlag 2003 |
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| Übergeordnetes Werk: |
Enthalten in: Environmental geology - Berlin : Springer, 1975, 44(2003), 2 vom: 07. Jan., Seite 158-168 |
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| Übergeordnetes Werk: |
volume:44 ; year:2003 ; number:2 ; day:07 ; month:01 ; pages:158-168 |
| Links: |
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| DOI / URN: |
10.1007/s00254-002-0740-7 |
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| 245 | 1 | 0 | |a Pedogeochemical models on prognosis and control of radon fluxes from humid tropical landscapes over granite |
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| 520 | |a Abstract The principal relationships between radon (222Rn and 220Rn) exhalation intensities and the morpho-dynamic elements of humid tropical landscapes have been established and analyzed with the objective of elaborating Rn exhalation models, which can be used on the scale of small habitational nuclei. The current radioactive processes of generation, emanation and migration of Rn, in relation to its exhalation rates on a landscape slope of granitic rock having normal U and Th contents, were correlated with the latosol-podzolic soil association developed as a product of supergene processes during geological and pedological times and also with the water regime of an overlying phreatic aquifer. This approach, encompassing pedogeochemical models of radionuclide dispersion linked to soil systems and surface geochemistry, was framed within a tridimensional, interdisciplinary and systemic focus, using concepts of nuclear physics, climate and hydrogeology. The characteristic signatures of elementary landscapes include (1) different landforms, namely eluvial, transeluvial and superaqual, (2) residual soils having varying types, thicknesses and perma-porosities and (3) radioanomalies corresponding to different U and Th concentrations, secondary hosting minerals and also to different pedological ages. Considering these factors and their spatial relationships and on the basis of moisture content of soils, it is postulated that the highest Rn exhalation rates, especially of 222Rn, are confined to superaqual and transeluvial landscapes. In an eluvial landscape, the Rn fluxes are found to be less important even though gamma anomalies exist mainly due to the presence of resistant minerals containing U and Th. In short, the products of supergene alteration organized in a sloping system can exhibit Rn exhaling intensities higher than that measured on unaltered subjacent rock. Hence, the understanding of U, Th, Ra and Rn behavior on a surface environment is fundamental for the formulation of prognostic Rn exhalation models associated with the elementary humid tropical landscapes. Further, the pedogeochemical information provides important clues supplementing the lithostructural data for delineating preferential sites of Rn fluxes especially on scales compatible to small habitational nuclei or unitary dwellings. | ||
| 650 | 4 | |a Radon fluxes |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a Pedogeochemical models |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a Humid tropical landscapes |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a Radioactive processes |7 (dpeaa)DE-He213 | |
| 700 | 1 | |a Bittencourt, A. V. L. |4 aut | |
| 700 | 1 | |a Mantovani, L. E. |4 aut | |
| 700 | 1 | |a Rossi, T. B. |4 aut | |
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10.1007/s00254-002-0740-7 doi (DE-627)SPR003043320 (SPR)s00254-002-0740-7-e DE-627 ger DE-627 rakwb eng Rebelo, A. M. A. verfasserin aut Pedogeochemical models on prognosis and control of radon fluxes from humid tropical landscapes over granite 2003 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Springer-Verlag 2003 Abstract The principal relationships between radon (222Rn and 220Rn) exhalation intensities and the morpho-dynamic elements of humid tropical landscapes have been established and analyzed with the objective of elaborating Rn exhalation models, which can be used on the scale of small habitational nuclei. The current radioactive processes of generation, emanation and migration of Rn, in relation to its exhalation rates on a landscape slope of granitic rock having normal U and Th contents, were correlated with the latosol-podzolic soil association developed as a product of supergene processes during geological and pedological times and also with the water regime of an overlying phreatic aquifer. This approach, encompassing pedogeochemical models of radionuclide dispersion linked to soil systems and surface geochemistry, was framed within a tridimensional, interdisciplinary and systemic focus, using concepts of nuclear physics, climate and hydrogeology. The characteristic signatures of elementary landscapes include (1) different landforms, namely eluvial, transeluvial and superaqual, (2) residual soils having varying types, thicknesses and perma-porosities and (3) radioanomalies corresponding to different U and Th concentrations, secondary hosting minerals and also to different pedological ages. Considering these factors and their spatial relationships and on the basis of moisture content of soils, it is postulated that the highest Rn exhalation rates, especially of 222Rn, are confined to superaqual and transeluvial landscapes. In an eluvial landscape, the Rn fluxes are found to be less important even though gamma anomalies exist mainly due to the presence of resistant minerals containing U and Th. In short, the products of supergene alteration organized in a sloping system can exhibit Rn exhaling intensities higher than that measured on unaltered subjacent rock. Hence, the understanding of U, Th, Ra and Rn behavior on a surface environment is fundamental for the formulation of prognostic Rn exhalation models associated with the elementary humid tropical landscapes. Further, the pedogeochemical information provides important clues supplementing the lithostructural data for delineating preferential sites of Rn fluxes especially on scales compatible to small habitational nuclei or unitary dwellings. Radon fluxes (dpeaa)DE-He213 Pedogeochemical models (dpeaa)DE-He213 Humid tropical landscapes (dpeaa)DE-He213 Radioactive processes (dpeaa)DE-He213 Bittencourt, A. V. L. aut Mantovani, L. E. aut Rossi, T. B. aut Enthalten in Environmental geology Berlin : Springer, 1975 44(2003), 2 vom: 07. Jan., Seite 158-168 (DE-627)253722586 (DE-600)1459034-7 1432-0495 nnns volume:44 year:2003 number:2 day:07 month:01 pages:158-168 https://dx.doi.org/10.1007/s00254-002-0740-7 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_20 GBV_ILN_24 GBV_ILN_31 GBV_ILN_40 GBV_ILN_63 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_110 GBV_ILN_120 GBV_ILN_150 GBV_ILN_151 GBV_ILN_161 GBV_ILN_267 GBV_ILN_285 GBV_ILN_293 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2007 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2018 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2055 GBV_ILN_2059 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2106 GBV_ILN_2108 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4338 AR 44 2003 2 07 01 158-168 |
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10.1007/s00254-002-0740-7 doi (DE-627)SPR003043320 (SPR)s00254-002-0740-7-e DE-627 ger DE-627 rakwb eng Rebelo, A. M. A. verfasserin aut Pedogeochemical models on prognosis and control of radon fluxes from humid tropical landscapes over granite 2003 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Springer-Verlag 2003 Abstract The principal relationships between radon (222Rn and 220Rn) exhalation intensities and the morpho-dynamic elements of humid tropical landscapes have been established and analyzed with the objective of elaborating Rn exhalation models, which can be used on the scale of small habitational nuclei. The current radioactive processes of generation, emanation and migration of Rn, in relation to its exhalation rates on a landscape slope of granitic rock having normal U and Th contents, were correlated with the latosol-podzolic soil association developed as a product of supergene processes during geological and pedological times and also with the water regime of an overlying phreatic aquifer. This approach, encompassing pedogeochemical models of radionuclide dispersion linked to soil systems and surface geochemistry, was framed within a tridimensional, interdisciplinary and systemic focus, using concepts of nuclear physics, climate and hydrogeology. The characteristic signatures of elementary landscapes include (1) different landforms, namely eluvial, transeluvial and superaqual, (2) residual soils having varying types, thicknesses and perma-porosities and (3) radioanomalies corresponding to different U and Th concentrations, secondary hosting minerals and also to different pedological ages. Considering these factors and their spatial relationships and on the basis of moisture content of soils, it is postulated that the highest Rn exhalation rates, especially of 222Rn, are confined to superaqual and transeluvial landscapes. In an eluvial landscape, the Rn fluxes are found to be less important even though gamma anomalies exist mainly due to the presence of resistant minerals containing U and Th. In short, the products of supergene alteration organized in a sloping system can exhibit Rn exhaling intensities higher than that measured on unaltered subjacent rock. Hence, the understanding of U, Th, Ra and Rn behavior on a surface environment is fundamental for the formulation of prognostic Rn exhalation models associated with the elementary humid tropical landscapes. Further, the pedogeochemical information provides important clues supplementing the lithostructural data for delineating preferential sites of Rn fluxes especially on scales compatible to small habitational nuclei or unitary dwellings. Radon fluxes (dpeaa)DE-He213 Pedogeochemical models (dpeaa)DE-He213 Humid tropical landscapes (dpeaa)DE-He213 Radioactive processes (dpeaa)DE-He213 Bittencourt, A. V. L. aut Mantovani, L. E. aut Rossi, T. B. aut Enthalten in Environmental geology Berlin : Springer, 1975 44(2003), 2 vom: 07. Jan., Seite 158-168 (DE-627)253722586 (DE-600)1459034-7 1432-0495 nnns volume:44 year:2003 number:2 day:07 month:01 pages:158-168 https://dx.doi.org/10.1007/s00254-002-0740-7 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_20 GBV_ILN_24 GBV_ILN_31 GBV_ILN_40 GBV_ILN_63 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_110 GBV_ILN_120 GBV_ILN_150 GBV_ILN_151 GBV_ILN_161 GBV_ILN_267 GBV_ILN_285 GBV_ILN_293 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2007 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2018 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2055 GBV_ILN_2059 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2106 GBV_ILN_2108 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4338 AR 44 2003 2 07 01 158-168 |
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10.1007/s00254-002-0740-7 doi (DE-627)SPR003043320 (SPR)s00254-002-0740-7-e DE-627 ger DE-627 rakwb eng Rebelo, A. M. A. verfasserin aut Pedogeochemical models on prognosis and control of radon fluxes from humid tropical landscapes over granite 2003 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Springer-Verlag 2003 Abstract The principal relationships between radon (222Rn and 220Rn) exhalation intensities and the morpho-dynamic elements of humid tropical landscapes have been established and analyzed with the objective of elaborating Rn exhalation models, which can be used on the scale of small habitational nuclei. The current radioactive processes of generation, emanation and migration of Rn, in relation to its exhalation rates on a landscape slope of granitic rock having normal U and Th contents, were correlated with the latosol-podzolic soil association developed as a product of supergene processes during geological and pedological times and also with the water regime of an overlying phreatic aquifer. This approach, encompassing pedogeochemical models of radionuclide dispersion linked to soil systems and surface geochemistry, was framed within a tridimensional, interdisciplinary and systemic focus, using concepts of nuclear physics, climate and hydrogeology. The characteristic signatures of elementary landscapes include (1) different landforms, namely eluvial, transeluvial and superaqual, (2) residual soils having varying types, thicknesses and perma-porosities and (3) radioanomalies corresponding to different U and Th concentrations, secondary hosting minerals and also to different pedological ages. Considering these factors and their spatial relationships and on the basis of moisture content of soils, it is postulated that the highest Rn exhalation rates, especially of 222Rn, are confined to superaqual and transeluvial landscapes. In an eluvial landscape, the Rn fluxes are found to be less important even though gamma anomalies exist mainly due to the presence of resistant minerals containing U and Th. In short, the products of supergene alteration organized in a sloping system can exhibit Rn exhaling intensities higher than that measured on unaltered subjacent rock. Hence, the understanding of U, Th, Ra and Rn behavior on a surface environment is fundamental for the formulation of prognostic Rn exhalation models associated with the elementary humid tropical landscapes. Further, the pedogeochemical information provides important clues supplementing the lithostructural data for delineating preferential sites of Rn fluxes especially on scales compatible to small habitational nuclei or unitary dwellings. Radon fluxes (dpeaa)DE-He213 Pedogeochemical models (dpeaa)DE-He213 Humid tropical landscapes (dpeaa)DE-He213 Radioactive processes (dpeaa)DE-He213 Bittencourt, A. V. L. aut Mantovani, L. E. aut Rossi, T. B. aut Enthalten in Environmental geology Berlin : Springer, 1975 44(2003), 2 vom: 07. Jan., Seite 158-168 (DE-627)253722586 (DE-600)1459034-7 1432-0495 nnns volume:44 year:2003 number:2 day:07 month:01 pages:158-168 https://dx.doi.org/10.1007/s00254-002-0740-7 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_20 GBV_ILN_24 GBV_ILN_31 GBV_ILN_40 GBV_ILN_63 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_110 GBV_ILN_120 GBV_ILN_150 GBV_ILN_151 GBV_ILN_161 GBV_ILN_267 GBV_ILN_285 GBV_ILN_293 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2007 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2018 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2055 GBV_ILN_2059 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2106 GBV_ILN_2108 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4338 AR 44 2003 2 07 01 158-168 |
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10.1007/s00254-002-0740-7 doi (DE-627)SPR003043320 (SPR)s00254-002-0740-7-e DE-627 ger DE-627 rakwb eng Rebelo, A. M. A. verfasserin aut Pedogeochemical models on prognosis and control of radon fluxes from humid tropical landscapes over granite 2003 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Springer-Verlag 2003 Abstract The principal relationships between radon (222Rn and 220Rn) exhalation intensities and the morpho-dynamic elements of humid tropical landscapes have been established and analyzed with the objective of elaborating Rn exhalation models, which can be used on the scale of small habitational nuclei. The current radioactive processes of generation, emanation and migration of Rn, in relation to its exhalation rates on a landscape slope of granitic rock having normal U and Th contents, were correlated with the latosol-podzolic soil association developed as a product of supergene processes during geological and pedological times and also with the water regime of an overlying phreatic aquifer. This approach, encompassing pedogeochemical models of radionuclide dispersion linked to soil systems and surface geochemistry, was framed within a tridimensional, interdisciplinary and systemic focus, using concepts of nuclear physics, climate and hydrogeology. The characteristic signatures of elementary landscapes include (1) different landforms, namely eluvial, transeluvial and superaqual, (2) residual soils having varying types, thicknesses and perma-porosities and (3) radioanomalies corresponding to different U and Th concentrations, secondary hosting minerals and also to different pedological ages. Considering these factors and their spatial relationships and on the basis of moisture content of soils, it is postulated that the highest Rn exhalation rates, especially of 222Rn, are confined to superaqual and transeluvial landscapes. In an eluvial landscape, the Rn fluxes are found to be less important even though gamma anomalies exist mainly due to the presence of resistant minerals containing U and Th. In short, the products of supergene alteration organized in a sloping system can exhibit Rn exhaling intensities higher than that measured on unaltered subjacent rock. Hence, the understanding of U, Th, Ra and Rn behavior on a surface environment is fundamental for the formulation of prognostic Rn exhalation models associated with the elementary humid tropical landscapes. Further, the pedogeochemical information provides important clues supplementing the lithostructural data for delineating preferential sites of Rn fluxes especially on scales compatible to small habitational nuclei or unitary dwellings. Radon fluxes (dpeaa)DE-He213 Pedogeochemical models (dpeaa)DE-He213 Humid tropical landscapes (dpeaa)DE-He213 Radioactive processes (dpeaa)DE-He213 Bittencourt, A. V. L. aut Mantovani, L. E. aut Rossi, T. B. aut Enthalten in Environmental geology Berlin : Springer, 1975 44(2003), 2 vom: 07. Jan., Seite 158-168 (DE-627)253722586 (DE-600)1459034-7 1432-0495 nnns volume:44 year:2003 number:2 day:07 month:01 pages:158-168 https://dx.doi.org/10.1007/s00254-002-0740-7 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_20 GBV_ILN_24 GBV_ILN_31 GBV_ILN_40 GBV_ILN_63 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_110 GBV_ILN_120 GBV_ILN_150 GBV_ILN_151 GBV_ILN_161 GBV_ILN_267 GBV_ILN_285 GBV_ILN_293 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2007 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2018 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2055 GBV_ILN_2059 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2106 GBV_ILN_2108 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4338 AR 44 2003 2 07 01 158-168 |
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10.1007/s00254-002-0740-7 doi (DE-627)SPR003043320 (SPR)s00254-002-0740-7-e DE-627 ger DE-627 rakwb eng Rebelo, A. M. A. verfasserin aut Pedogeochemical models on prognosis and control of radon fluxes from humid tropical landscapes over granite 2003 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Springer-Verlag 2003 Abstract The principal relationships between radon (222Rn and 220Rn) exhalation intensities and the morpho-dynamic elements of humid tropical landscapes have been established and analyzed with the objective of elaborating Rn exhalation models, which can be used on the scale of small habitational nuclei. The current radioactive processes of generation, emanation and migration of Rn, in relation to its exhalation rates on a landscape slope of granitic rock having normal U and Th contents, were correlated with the latosol-podzolic soil association developed as a product of supergene processes during geological and pedological times and also with the water regime of an overlying phreatic aquifer. This approach, encompassing pedogeochemical models of radionuclide dispersion linked to soil systems and surface geochemistry, was framed within a tridimensional, interdisciplinary and systemic focus, using concepts of nuclear physics, climate and hydrogeology. The characteristic signatures of elementary landscapes include (1) different landforms, namely eluvial, transeluvial and superaqual, (2) residual soils having varying types, thicknesses and perma-porosities and (3) radioanomalies corresponding to different U and Th concentrations, secondary hosting minerals and also to different pedological ages. Considering these factors and their spatial relationships and on the basis of moisture content of soils, it is postulated that the highest Rn exhalation rates, especially of 222Rn, are confined to superaqual and transeluvial landscapes. In an eluvial landscape, the Rn fluxes are found to be less important even though gamma anomalies exist mainly due to the presence of resistant minerals containing U and Th. In short, the products of supergene alteration organized in a sloping system can exhibit Rn exhaling intensities higher than that measured on unaltered subjacent rock. Hence, the understanding of U, Th, Ra and Rn behavior on a surface environment is fundamental for the formulation of prognostic Rn exhalation models associated with the elementary humid tropical landscapes. Further, the pedogeochemical information provides important clues supplementing the lithostructural data for delineating preferential sites of Rn fluxes especially on scales compatible to small habitational nuclei or unitary dwellings. Radon fluxes (dpeaa)DE-He213 Pedogeochemical models (dpeaa)DE-He213 Humid tropical landscapes (dpeaa)DE-He213 Radioactive processes (dpeaa)DE-He213 Bittencourt, A. V. L. aut Mantovani, L. E. aut Rossi, T. B. aut Enthalten in Environmental geology Berlin : Springer, 1975 44(2003), 2 vom: 07. Jan., Seite 158-168 (DE-627)253722586 (DE-600)1459034-7 1432-0495 nnns volume:44 year:2003 number:2 day:07 month:01 pages:158-168 https://dx.doi.org/10.1007/s00254-002-0740-7 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_20 GBV_ILN_24 GBV_ILN_31 GBV_ILN_40 GBV_ILN_63 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_110 GBV_ILN_120 GBV_ILN_150 GBV_ILN_151 GBV_ILN_161 GBV_ILN_267 GBV_ILN_285 GBV_ILN_293 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2007 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2018 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2026 GBV_ILN_2031 GBV_ILN_2034 GBV_ILN_2037 GBV_ILN_2038 GBV_ILN_2039 GBV_ILN_2044 GBV_ILN_2055 GBV_ILN_2059 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2070 GBV_ILN_2086 GBV_ILN_2106 GBV_ILN_2108 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2116 GBV_ILN_2118 GBV_ILN_2119 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2144 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2188 GBV_ILN_2190 GBV_ILN_2232 GBV_ILN_4012 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4246 GBV_ILN_4249 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4328 GBV_ILN_4333 GBV_ILN_4338 AR 44 2003 2 07 01 158-168 |
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Rebelo, A. M. A. |
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Rebelo, A. M. A. misc Radon fluxes misc Pedogeochemical models misc Humid tropical landscapes misc Radioactive processes Pedogeochemical models on prognosis and control of radon fluxes from humid tropical landscapes over granite |
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Pedogeochemical models on prognosis and control of radon fluxes from humid tropical landscapes over granite Radon fluxes (dpeaa)DE-He213 Pedogeochemical models (dpeaa)DE-He213 Humid tropical landscapes (dpeaa)DE-He213 Radioactive processes (dpeaa)DE-He213 |
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Pedogeochemical models on prognosis and control of radon fluxes from humid tropical landscapes over granite |
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Rebelo, A. M. A. Bittencourt, A. V. L. Mantovani, L. E. Rossi, T. B. |
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pedogeochemical models on prognosis and control of radon fluxes from humid tropical landscapes over granite |
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Pedogeochemical models on prognosis and control of radon fluxes from humid tropical landscapes over granite |
| abstract |
Abstract The principal relationships between radon (222Rn and 220Rn) exhalation intensities and the morpho-dynamic elements of humid tropical landscapes have been established and analyzed with the objective of elaborating Rn exhalation models, which can be used on the scale of small habitational nuclei. The current radioactive processes of generation, emanation and migration of Rn, in relation to its exhalation rates on a landscape slope of granitic rock having normal U and Th contents, were correlated with the latosol-podzolic soil association developed as a product of supergene processes during geological and pedological times and also with the water regime of an overlying phreatic aquifer. This approach, encompassing pedogeochemical models of radionuclide dispersion linked to soil systems and surface geochemistry, was framed within a tridimensional, interdisciplinary and systemic focus, using concepts of nuclear physics, climate and hydrogeology. The characteristic signatures of elementary landscapes include (1) different landforms, namely eluvial, transeluvial and superaqual, (2) residual soils having varying types, thicknesses and perma-porosities and (3) radioanomalies corresponding to different U and Th concentrations, secondary hosting minerals and also to different pedological ages. Considering these factors and their spatial relationships and on the basis of moisture content of soils, it is postulated that the highest Rn exhalation rates, especially of 222Rn, are confined to superaqual and transeluvial landscapes. In an eluvial landscape, the Rn fluxes are found to be less important even though gamma anomalies exist mainly due to the presence of resistant minerals containing U and Th. In short, the products of supergene alteration organized in a sloping system can exhibit Rn exhaling intensities higher than that measured on unaltered subjacent rock. Hence, the understanding of U, Th, Ra and Rn behavior on a surface environment is fundamental for the formulation of prognostic Rn exhalation models associated with the elementary humid tropical landscapes. Further, the pedogeochemical information provides important clues supplementing the lithostructural data for delineating preferential sites of Rn fluxes especially on scales compatible to small habitational nuclei or unitary dwellings. © Springer-Verlag 2003 |
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Abstract The principal relationships between radon (222Rn and 220Rn) exhalation intensities and the morpho-dynamic elements of humid tropical landscapes have been established and analyzed with the objective of elaborating Rn exhalation models, which can be used on the scale of small habitational nuclei. The current radioactive processes of generation, emanation and migration of Rn, in relation to its exhalation rates on a landscape slope of granitic rock having normal U and Th contents, were correlated with the latosol-podzolic soil association developed as a product of supergene processes during geological and pedological times and also with the water regime of an overlying phreatic aquifer. This approach, encompassing pedogeochemical models of radionuclide dispersion linked to soil systems and surface geochemistry, was framed within a tridimensional, interdisciplinary and systemic focus, using concepts of nuclear physics, climate and hydrogeology. The characteristic signatures of elementary landscapes include (1) different landforms, namely eluvial, transeluvial and superaqual, (2) residual soils having varying types, thicknesses and perma-porosities and (3) radioanomalies corresponding to different U and Th concentrations, secondary hosting minerals and also to different pedological ages. Considering these factors and their spatial relationships and on the basis of moisture content of soils, it is postulated that the highest Rn exhalation rates, especially of 222Rn, are confined to superaqual and transeluvial landscapes. In an eluvial landscape, the Rn fluxes are found to be less important even though gamma anomalies exist mainly due to the presence of resistant minerals containing U and Th. In short, the products of supergene alteration organized in a sloping system can exhibit Rn exhaling intensities higher than that measured on unaltered subjacent rock. Hence, the understanding of U, Th, Ra and Rn behavior on a surface environment is fundamental for the formulation of prognostic Rn exhalation models associated with the elementary humid tropical landscapes. Further, the pedogeochemical information provides important clues supplementing the lithostructural data for delineating preferential sites of Rn fluxes especially on scales compatible to small habitational nuclei or unitary dwellings. © Springer-Verlag 2003 |
| abstract_unstemmed |
Abstract The principal relationships between radon (222Rn and 220Rn) exhalation intensities and the morpho-dynamic elements of humid tropical landscapes have been established and analyzed with the objective of elaborating Rn exhalation models, which can be used on the scale of small habitational nuclei. The current radioactive processes of generation, emanation and migration of Rn, in relation to its exhalation rates on a landscape slope of granitic rock having normal U and Th contents, were correlated with the latosol-podzolic soil association developed as a product of supergene processes during geological and pedological times and also with the water regime of an overlying phreatic aquifer. This approach, encompassing pedogeochemical models of radionuclide dispersion linked to soil systems and surface geochemistry, was framed within a tridimensional, interdisciplinary and systemic focus, using concepts of nuclear physics, climate and hydrogeology. The characteristic signatures of elementary landscapes include (1) different landforms, namely eluvial, transeluvial and superaqual, (2) residual soils having varying types, thicknesses and perma-porosities and (3) radioanomalies corresponding to different U and Th concentrations, secondary hosting minerals and also to different pedological ages. Considering these factors and their spatial relationships and on the basis of moisture content of soils, it is postulated that the highest Rn exhalation rates, especially of 222Rn, are confined to superaqual and transeluvial landscapes. In an eluvial landscape, the Rn fluxes are found to be less important even though gamma anomalies exist mainly due to the presence of resistant minerals containing U and Th. In short, the products of supergene alteration organized in a sloping system can exhibit Rn exhaling intensities higher than that measured on unaltered subjacent rock. Hence, the understanding of U, Th, Ra and Rn behavior on a surface environment is fundamental for the formulation of prognostic Rn exhalation models associated with the elementary humid tropical landscapes. Further, the pedogeochemical information provides important clues supplementing the lithostructural data for delineating preferential sites of Rn fluxes especially on scales compatible to small habitational nuclei or unitary dwellings. © Springer-Verlag 2003 |
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