摘要
核示踪技术是研究土壤侵蚀的一种新技术。本文简述了土壤侵蚀研究中核示踪技术的应用现状，并介绍了一种新方法———稳定性稀土元素（ＲＥＥ）示踪法。该方法可定量测定坡面不同地形部位的相对侵蚀量，揭示侵蚀过程中相对侵蚀量沿坡面的变化趋势，还可反映野外全坡长小区土壤侵蚀的分布模式。应用结果表明，稀土元素在土壤侵蚀时空分布、泥沙运移、沉积过程以及小流域泥沙来源等研究领域均有广阔的应用前景。
Present application status of nuclear monitoring technique, an advanced technique in soil erosion study, is simply described in the paper as well as a new method——stable rare-earth element (REE) monitoring technique——introduced. The new method can be used to quantitatively measure the relative erosion at different landform sites of a slope, reveal the tendency of relative erosion quantity change along the slope in erosion process and reflect soil erosion distribution pattern in whole slope experimental plot in field. Application of the method demonstrates that there are bright prospect of rare-earth element application in study fields of soil erosion distribution along with time and space, sediment transportation, sedimentation, small watershed sediment source, and so on.
出处
《中国水土保持》
1998年第12期31-33,共3页
Soil and Water Conservation in China
关键词
土壤侵蚀
核示踪技术
稀土元素
应用前景
soil erosion nuclear monitoring technique rare-earth element application prospect
