%0 Book Section %T Quantification of the sediment budget of a river basin, based on reconstruction of the post-fallout redistribution of Chernobyl particle-bound $^{137}$Cs %+ Lomonosov Moscow State University (MSU) %+ Kazan Federal University (KFU) %+ Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] (LSCE) %+ Géochimie Des Impacts (GEDI) %+ Modélisation des Surfaces et Interfaces Continentales (MOSAIC) %A Belyaev, Vladimir %A Shamshurina, Eugenia %A Markelov, Maxim %A Golosov, Valentin %A Ivanova, Nadezda %A Bondarev, Valeriy %A Paramonova, Tatiana %A Evrard, O. %A Ottle, Catherine %A Lefèvre, Irène %A Bonté, Philippe %Z CNRS (France) and the RFBR (Russia) in the framework of their joint international research programme (CNRS-RFBR project 09-05-91057). %B Erosion and Sediment Yields in the Changing Environment (Proceedings of a symposium held at the Institute of Mountain Hazards and Environment, CAS-Chengdu, China, 11–15 October 2012) %V IAHS Publ. 356 %8 2012-10-15 %D 2012 %K sediment budget %K $^{137}$Cs %K sediment sources and sinks %K fluvial system %K human-accelerated soil erosion %K Central European Russia %Z Environmental Sciences %Z Environmental Sciences/Global Changes %Z Sciences of the Universe [physics]/Continental interfaces, environment %Z Sciences of the Universe [physics]/Earth Sciences/Geomorphology %Z Sciences of the Universe [physics]/Earth Sciences/Hydrology %Z Life Sciences [q-bio]/Agricultural sciences/Soil studyBook sections %X Quantitative assessment of the sediment budget of a fluvial system is a key approach to understanding its geomorphic behaviour and an essential tool for investigating the redistribution of particle-bound contaminants along the sediment cascade. Here, we present a study involving the application of several independent approaches for quantifying the post-fallout (1986-2009) redistribution of Chernobyl particle-bound $^{137}$Cs and the basin-scale sediment budget for the River Plava basin situated in the northern part of the Srednerusskaya Upland (Central European Russia). The techniques employed include $^{137}$Cs-based sediment tracing, two soil erosion models and the analysis of soil profile morphology. The results show that most of the sediment originating from human-accelerated soil erosion on cultivated slopes is redeposited on the uncultivated lower parts of the slopes or in the bottoms of infilled gullies, hollows and 1-3rd order valleys. The River Plava valley itself represents a system dominated by efficient transport, with very limited floodplain sediment storage. The $^{137}$Cs-contaminated sediment export from the River Plava basin outlet exerts a significant impact on the River Upa. Its floodplain sediment contamination by $^{137}$Cs downstream of the River Plava mouth increases by almost an order of magnitude. %G English %2 https://cea.hal.science/cea-02615665/document %2 https://cea.hal.science/cea-02615665/file/Belyaev-IAHS-Red-Book-2012.pdf %L cea-02615665 %U https://cea.hal.science/cea-02615665 %~ SDE %~ CEA %~ INSU %~ CNRS %~ GIP-BE %~ UVSQ %~ LSCE %~ LSCE-CEA %~ GS-GEOSCIENCES