137Cs Finger Printing Technique for Erosion and Sedimentation Studies
137Cs Finger Printing Technique for Erosion and Sedimentation Studies
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DOI：
10.1007/s11629-012-2203-2
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发表时间：
2012-01
影响因子：
2.5
通讯作者：
Long Yi;Z. Xinbao;Wen An-bang;He Xiubin
中科院分区：
文献类型：
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作者：
Long Yi;Z. Xinbao;Wen An-bang;He Xiubin
137 Cs是一种半衰期为30.2年的人工放射性核素，是20世纪50 - 70年代核武器大气试验的副产物，在1963年达到沉降高峰。137 Cs沉降物主要随降水沉降到地面，并被土壤颗粒强烈而迅速地吸附。137 Cs示踪技术自20世纪80年代以来被广泛应用于土壤侵蚀和沉积研究。本文介绍了该技术的基础，并展示了该技术在黄土高原和长江上游流域进行土壤侵蚀率评估、沉积物来源调查和水库沉积物测年的几个案例。
137Cs is an artificial radionuclide with a half -life of 30.2 years, which was released into the environment as a byproduct of atmospheric testing of nuclear weapons during the period of 1950s to 1970s with a peak deposition in 1963.137Cs fallout was strongly and rapidly adsorbed by soil particles when it deposited on the ground mostly with precipitation. Its following movements will associate with the adsorbed particles.137Cs tracing technique has been widely used in soil erosion and sedimentation studies since 1980s. This paper introduces the basis of the technique and shows several case studies of assessment of soil erosion rates, investigation of sediment sources and dating of reservoir deposits by using the technique in the Loess Plateau and the Upper Yangtze River Basin.