核素比率在土壤侵蚀区的应用探讨——以^(210)Pb_(ex)/^(137)Cs为例  

Study on the Inventory Ratio of Radionuclides in Soil Erosion——With ^(210)Pb_(ex)/^(137)Cs as an Example

作　　者：高明[1] 

机构地区：[1]南京师范大学地理科学学院,南京210097

出　　处：《水土保持研究》2006年第2期147-149,171,共4页Research of Soil and Water Conservation

基　　金："应用Cs-137等核示踪元素测定坡耕地土壤侵蚀量的研究"(项目编号2005105HX1B44J)

摘　　要：环境放射性核素7B e、137C s和210Pb为测量土壤侵蚀和沉积速率提供了一种重要的方法。在某些情况下,由于受各种因素的影响,单一核素进行示踪研究很难精确测量,而核素比率的方法作为有益的补充,能够精确测量土壤侵蚀量的多少。这篇文章介绍W a llbrink和M urray在S t.H e lens森林区用210Pbex/137C s方法测量土壤侵蚀的情况,了解国外的研究动态,对此也提出在应用核素比率法中应注意的问题和展望。The environmental radionuelides ^7Be,^137Cs and ^210Pb for documenting soil erosion and sendiment rates provides an important method. However there are environments in which it is difficult for only one radionuclide to document soil erosion accurately because of other factors. Using the inventory ratio of excess ^210Pb to ^137Cs to measure soil loss accurately is complementary method. It describes that Wallbrlnk and Murray use the inventory ratio of excess ^210Pbex to ^137Cs to measure soil loss in St. Helens forest,know abroad study on recent progress,and provide good suggestion on this method.

关 键 词：核素比率 土壤侵蚀 ^210Pbex/^137Cs法 

分 类 号：S157[农业科学—土壤学]