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地理学报  2014 

内蒙古中东部地区137Cs背景值的确定

DOI: 10.11821/dlxb201403006, PP. 343-352

Keywords: 大尺度区域,同位素示踪,采样方法,内蒙古,137Cs背景值

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Abstract:

在137Cs环境示踪研究中,区域137Cs背景值(CRI)的获取存在许多困难和不确定性。在总结传统137Cs区域背景值获取方法基础上,本文提出了适用于大尺度区域和长距离路线考察的区域137Cs背景值获取技术路线,即在参考有关地理背景信息和长时间序列遥感信息、科学划分子区基础上,根据理论模型计算得到区域137Cs背景值潜在值域,并开展基于137Cs土壤剖面分布形态特征的蚀积过程分析,最终确定137Cs区域背景样地和区域背景值。以上述技术流程为指导,本文作者在内蒙古高平原中东部地区开展案例研究,结果表明兴安盟东部、南部暗栗钙土研究区的CRI为2447Bq·m-2,通辽市中部、南部和赤峰市东部风沙土研究区的CRI为2430Bq·m-2,赤峰市西北部黑钙土研究区的CRI为2384Bq·m-2,锡林郭勒盟南部栗钙土研究区的CRI为2368Bq·m-2。

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