| 大气散落核素复合示踪在土壤侵蚀科学中的应用 |
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| 引用本文： | 王晓燕,田均良. 大气散落核素复合示踪在土壤侵蚀科学中的应用[J]. 水土保持研究, 2001, 8(2): 133-137 |
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| 作者姓名： | 王晓燕 田均良 |
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| 作者单位： | 中国科学院水利部水土保持研究所, 陕西, 杨陵, 712100 |
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| 基金项目： | 国家自然科学基金项目(40071059)。 |
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| 摘 要： | 介绍了大气散落核素7Be、210Pbex、137Cs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.
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| 关 键 词： | 大气散落放射性元素 复合示踪 核素比率 土壤侵蚀 泥沙来源 |
| 文章编号： | 1005-3409(2001)02-0133-05 |
| 修稿时间： | 2000-03-19 |
Compound Application ofFallout Radionuclides on Studies of Soil Erosion |
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| WANG Xiao-yan,TIAN Jun-liang. Compound Application ofFallout Radionuclides on Studies of Soil Erosion[J]. Research of Soil and Water Conservation, 2001, 8(2): 133-137 |
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| Authors: | WANG Xiao-yan TIAN Jun-liang |
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| Affiliation: | Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling, Shanxi, 712100, China |
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| Abstract: | The compound application of fallout radionuclides 7 Be、210Pbex 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 Pb to 7 Be and use them to determine the original soil depth of sediment.The advantages and limitations of all these methods are discussed. |
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| Keywords: | fallout radionuclides compound trace nuclides ratio soil erosion sediment sources |
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