Random and systematic spatial variability of 137Cs inventories at reference sites in South-Central Brazil
The precision of the 137Cs fallout redistribution technique for the evaluation of soil erosion rates is strongly dependent on the quality of an average inventory taken at a representative reference site. The knowledge of the sources and of the degree of variation of the 137Cs fallout spatial distribution plays an important role on its use. Four reference sites were selected in the South-Central region of Brazil which were characterized in terms of soil chemical, physical and mineralogical aspects as well as the spatial variability of 137Cs inventories. Some important differences in the patterns of 137Cs depth distribution in the soil profiles of the different sites were found. They are probably associated to chemical, physical, mineralogical and biological differences of the soils but many questions still remain open for future investigation, mainly those regarding the adsorption and dynamics of the 137Cs ions in soil profiles under tropical conditions. The random spatial variability (inside each reference site) was higher than the systematic spatial variability (between reference sites) but their causes were not clearly identified as possible consequences of chemical, physical, mineralogical variability, and/or precipitation.
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Escola Superior de Agricultura "Luiz de Queiroz"
2005
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oai:scielo:S0103-901620050002000132005-04-08Random and systematic spatial variability of 137Cs inventories at reference sites in South-Central BrazilCorrechel,VladiaBacchi,Osny Oliveira SantosReichardt,KlausDe Maria,Isabella Clerici cesium-137 spatial distribution radioisotope sediment radioactive tracer The precision of the 137Cs fallout redistribution technique for the evaluation of soil erosion rates is strongly dependent on the quality of an average inventory taken at a representative reference site. The knowledge of the sources and of the degree of variation of the 137Cs fallout spatial distribution plays an important role on its use. Four reference sites were selected in the South-Central region of Brazil which were characterized in terms of soil chemical, physical and mineralogical aspects as well as the spatial variability of 137Cs inventories. Some important differences in the patterns of 137Cs depth distribution in the soil profiles of the different sites were found. They are probably associated to chemical, physical, mineralogical and biological differences of the soils but many questions still remain open for future investigation, mainly those regarding the adsorption and dynamics of the 137Cs ions in soil profiles under tropical conditions. The random spatial variability (inside each reference site) was higher than the systematic spatial variability (between reference sites) but their causes were not clearly identified as possible consequences of chemical, physical, mineralogical variability, and/or precipitation.info:eu-repo/semantics/openAccessEscola Superior de Agricultura "Luiz de Queiroz"Scientia Agricola v.62 n.2 20052005-04-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162005000200013en10.1590/S0103-90162005000200013 |
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Correchel,Vladia Bacchi,Osny Oliveira Santos Reichardt,Klaus De Maria,Isabella Clerici |
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Correchel,Vladia Bacchi,Osny Oliveira Santos Reichardt,Klaus De Maria,Isabella Clerici Random and systematic spatial variability of 137Cs inventories at reference sites in South-Central Brazil |
author_facet |
Correchel,Vladia Bacchi,Osny Oliveira Santos Reichardt,Klaus De Maria,Isabella Clerici |
author_sort |
Correchel,Vladia |
title |
Random and systematic spatial variability of 137Cs inventories at reference sites in South-Central Brazil |
title_short |
Random and systematic spatial variability of 137Cs inventories at reference sites in South-Central Brazil |
title_full |
Random and systematic spatial variability of 137Cs inventories at reference sites in South-Central Brazil |
title_fullStr |
Random and systematic spatial variability of 137Cs inventories at reference sites in South-Central Brazil |
title_full_unstemmed |
Random and systematic spatial variability of 137Cs inventories at reference sites in South-Central Brazil |
title_sort |
random and systematic spatial variability of 137cs inventories at reference sites in south-central brazil |
description |
The precision of the 137Cs fallout redistribution technique for the evaluation of soil erosion rates is strongly dependent on the quality of an average inventory taken at a representative reference site. The knowledge of the sources and of the degree of variation of the 137Cs fallout spatial distribution plays an important role on its use. Four reference sites were selected in the South-Central region of Brazil which were characterized in terms of soil chemical, physical and mineralogical aspects as well as the spatial variability of 137Cs inventories. Some important differences in the patterns of 137Cs depth distribution in the soil profiles of the different sites were found. They are probably associated to chemical, physical, mineralogical and biological differences of the soils but many questions still remain open for future investigation, mainly those regarding the adsorption and dynamics of the 137Cs ions in soil profiles under tropical conditions. The random spatial variability (inside each reference site) was higher than the systematic spatial variability (between reference sites) but their causes were not clearly identified as possible consequences of chemical, physical, mineralogical variability, and/or precipitation. |
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Escola Superior de Agricultura "Luiz de Queiroz" |
publishDate |
2005 |
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http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162005000200013 |
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AT correchelvladia randomandsystematicspatialvariabilityof137csinventoriesatreferencesitesinsouthcentralbrazil AT bacchiosnyoliveirasantos randomandsystematicspatialvariabilityof137csinventoriesatreferencesitesinsouthcentralbrazil AT reichardtklaus randomandsystematicspatialvariabilityof137csinventoriesatreferencesitesinsouthcentralbrazil AT demariaisabellaclerici randomandsystematicspatialvariabilityof137csinventoriesatreferencesitesinsouthcentralbrazil |
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