中文摘要：

137Cs 有一半的人工的放射性核种 30.2 年的生活，它作为在 1963 的与山峰免职的到 1970 年代的在 1950 年代的时期期间的原子武器的大气的测试的一个副产品被释放进环境。当它主要与降水在地面上扔了时， 137Cs 放射性尘埃被土壤粒子强烈并且很快吸附。它运动将与吸附的粒子联系的追随者。自从 1980 年代，跟踪技术的 137Cs 广泛地在土壤侵蚀和沉积研究被使用了。这份报纸介绍这种技术的基础并且显示出对土壤侵蚀率的评价的几案例研究，沉积的调查采购原料，水库标明日期由在黄土高原和上面的长江盆使用这种技术扔。

英文摘要：

137 Cs 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 1963.137 Cs 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.137 Cs 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.