摘要
介绍不同类型的同位素的来源,对几种常用的同位素示踪土壤侵蚀的应用做了比较详细的总结。在过去几十年里,人为放射性核素137Cs在土壤侵蚀示踪研究中应用最广泛。同位素210Pb来自于自然界,它在土壤侵蚀中应用的准确度,有待于进一步探讨。宇宙射线产生的放射性核素中,主要介绍7Be在土壤侵蚀研究中的应用。对稳定性稀土元素和几种核素复合示踪土壤侵蚀与泥沙来源研究的国内外研究进展,进行了总结和评价。对应用同位素示踪土壤侵蚀的发展方向,提出了一些看法。
The origins of different types of isotopes are introduced. The application of several isotopes as tracer on the studies of soil erosion is also reviewed detailedly. In the past decades man-made radionuclide 137Cs was used as tracer most broadly in soil erosion field. Isotope 210 Pb comes from nature and the veracity of its application on soil erosion do need more consideration. Astro-raus produce many radionuclides and the application of 7Be as tracer on soil erosion is introduced in this paper. The studies of those that stable rare earth elements trace soil erosion process and several nuclides are compounded together to distinguish source of sediment are also summarized and evaluated. Some suggestions about the direction of application of isotopes on soil erosion are proposed.
出处
《中国水土保持科学》
CSCD
2003年第4期72-77,共6页
Science of Soil and Water Conservation
基金
中国科学院知识创新项目"黄土高原水土保持与生态环境建设试验示范研究"(KZCX1-06)
国家自然科学基金"137Cs和7Be复合示踪研究坡耕地侵蚀产沙时空分布特征"项目(40071059)