节点文献

137Cs技术定量侵蚀速率常用模型及其讨论

Several Models for Converting 137Cs Measurements to Estimating Soil Erosion Rates and Reliability of Hypothesis

  • 推荐 CAJ下载
  • PDF下载
  • 不支持迅雷等下载工具,请取消加速工具后下载。

【作者】 郑永春王世杰

【Author】 ZHENG Yong chun 1,2 and WANG Shi jie 1 (1.The State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, Guizhou, 550002 China; 2.Institute of Postgraduate, Chinese Academy of Sciences

【机构】 中国科学院地球化学研究所环境地球化学国家重点实验室中国科学院地球化学研究所环境地球化学国家重点实验室 贵州贵阳550002中国科学院研究生院北京100039贵州贵阳550002

【摘要】 土壤侵蚀将导致严重的土地退化和其它环境危害 ,侵蚀危害的评估需要关于侵蚀速率和侵蚀的时空分布模式的大量信息。1 37Cs具有独特的输入来源和地球化学性质 ,使其成为研究自1 37Cs首次沉降以来约 30年的平均土壤侵蚀速率的最优示踪剂。比例模型、简化的质量平衡模型、基于1 37Cs地表富集的质量平衡模型、剖面分布模型是近年来常用的几种模型 ,各有其优势和局限性。这些模型都是在一些假设的基础上推导出来的 ,这些假设是否成立需要理论论证和实验验证 ,文章对多数定量模型所含的假设条件进行讨论

【Abstract】 Soil erosion induced serious soil degradation and other environmental hazards. The evaluation of effect of erosion and the soil conversation need a large number of data about erosion rates and modes. Then the government and peasants can adopt an economical and effective method to reduce erosion rates and rectify land use. 137 Cs is a kind of radionuclide with special input source and geochemistry characteristic. It came from nuclear weapon tests and nuclear reactor accidents in 1950s~1970s. 137 Cs falls to soil surface with rainfall and integrated with soil particle, then move with particle. It became the best tracer to quantify erosion rates in about 30 years scales in all nuclides. Proportional model, simplified mass balance model, a mass balance model based on surface enrichment, profile distribution model are the several familiar quantitative models. They have themselves’ advantages and limitations. But these quantitative models are all deduced with much hypothesis. These hypothesis should be reasoned and validated. This paper discussed some hypothesis in the end.

【基金】 国家自然科学基金重点项目 (4 983 3 0 0 2 );国家“九五”攻关项目 (96-92 0 -0 4-0 2 -12 );知识创新西部之光联合资助
  • 【文献出处】 山地学报 ,Journal of Mountain Research , 编辑部邮箱 ,2002年05期
  • 【分类号】S157.1
  • 【被引频次】16
  • 【下载频次】184
节点文献中: 

本文链接的文献网络图示:

本文的引文网络