大气散落核素复合示踪在土壤侵蚀科学中的应用

介绍了大气散落核素 7Be、2 1 0 Pbex、1 37Cs复合在土壤侵蚀和泥沙来源领域中的研究进展 ;阐述了核素比率应用的原理、特点及其能更为敏感地反映土壤侵蚀速率和过程等优点 ;说明多元素复合示踪在推断土壤不同侵蚀过程及估算土壤侵蚀速率方面的作用 ;论述了建立两核素相关深度曲线确定泥沙起源深度的应用原理和特点及其应用范围 ,并对各种方法进行了简单的评价。

The compound application of fallout radionuclides 7 Be、 210 Pb ex and 137 Cs in the field of soil erosion and sediment sources are reviewed. The principle and characteristics of the nuclides ratio technology are introduced ,using several nuclides compoundly to distinguish soil erosion processes and to estimate soil erosion rate ;combining the different depth distribution of the fallout radionuclides in soils with one another to create reference curves of 7 Be to 210 Pb or 210...