基于不同调查尺度的城市土壤氡浓度背景值和异常阈值测算方法稳健性分析与应用  

Robustness Analysis and Application of Methods forEstimating the Background Value and Anomaly Threshold ofRadon Concentration in Urban Soil Based on Different Survey Scales

作　　者：马婷婷 阙泽胜 Ma Tingting;Que Zesheng(Radiation Environmental Monitoring Center of Guangdong Province Nuclear Industry Geological Bureau,Guangzhou 510800)

机构地区：[1]广东省核工业地质局辐射环境监测中心,广州510800

出　　处：《辐射防护通讯》2023年第5期29-34,共6页Radiation Protection Bulletin

摘　　要：从特定区域型、线型和区域型3种调查尺度对研究区域进行样本划分,分别使用传统统计法、分布形式检验法、探索性数据分析法和中位数绝对离差法等4种方法对研究区域土壤氡浓度背景值和异常阈值进行计算,并分析了4种方法的稳健性,最后计算了研究区域土壤氡浓度水平。结果表明:全研究区域土壤氡样本服从近似对数正态分布,中位数绝对离差法在测算土壤氡浓度背景值和异常阈值有较好稳健性,全区域土壤氡浓度背景值为9132 Bq/m^(3),异常阈值为13497 Bq/m^(3)。The background value and anomaly threshold of soil radon concentration in the investigation area were calculated by using four methods which include:traditional statistical method,distribution form test method,exploratory data analysis method and median absolute dispersion method.The robustness of the four methods was analyzed.Finally the soil radon concentration level in the investigation area was calculated.The results showed that the soil radon samples in the whole investigation area obeyed an approximate lognormal distribution.The median absolute dispersion method had good robustness in measuring the background value and anomaly threshold of soil radon concentration.The background value of soil radon concentration in the whole region was 9132 Bq/m^(3),and the anomaly threshold was 13497 Bq/m^(3).

关 键 词：土壤氡浓度 调查尺度 统计方法 中位数绝对离差法 

分 类 号：X53[环境科学与工程—环境工程] X831[天文地球—地图制图学与地理信息工程] P208[天文地球—测绘科学与技术]