Combining multiple fallout radionuclides (137Cs, 7Be, 210Pbxs) to investigate temporal sediment source dynamics in tropical, ephem

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• 作者：Olivier Evrard ; J. Patrick Laceby ; Sylvain Huon…
• 关键词：Beryllium ; 7 ; Caesium ; 137 ; Fingerprinting ; Laos ; Lead ; 210 ; Sediment tracing
• 刊名：Journal of Soils and Sediments
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：16
• 期：3
• 页码：1130-1144
• 全文大小：2,010 KB
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• 作者单位：Olivier Evrard (1)
  J. Patrick Laceby (1)
  Sylvain Huon (2)
  Irène Lefèvre (1)
  Oloth Sengtaheuanghoung (3)
  Olivier Ribolzi (4)
  
  1. Laboratoire des Sciences du Climat et de l’Environnement (LSCE), UMR 8212 (CEA-CNRS-UVSQ/IPSL), 91198, Gif-sur-Yvette Cedex, France
  2. Université Pierre et Marie Curie (UPMC), UMR 7618 iEES (UPMC-CNRS-IRD-INRA-Université Paris 7-UPEC), 75252, Paris Cedex 05, France
  3. Department of Agriculture Land Management (DALam), Vientiane, Lao PDR
  4. IRD, Géosciences Environnement Toulouse (GET), UMR 5563 (CNRS-UPS-IRD), 31400, Toulouse, France
  
• 刊物类别：Earth and Environmental Science
• 刊物主题：Environment
  Soil Science and Conservation
  Environment
  Environmental Physics
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1614-7480

文摘

Purpose Land use change and the associated acceleration of soil erosion have increased sediment supply to rivers worldwide. To effectively manage sediment loads, it is important to understand sediment dynamics. Fallout radionuclides (i.e. Be-7, excess Pb-210, Cs-137) separately provide spatial and temporal sediment source information. However, their combined application has been limited by an assumption that subsurface sources do not receive 7Be fallout. Here, we examine this assumption and investigate the utility of combining these radionuclides to simultaneously model spatial and temporal sediment source dynamics.