摘要
为分析中江县水源地健康风险水平,收集了研究区内60个乡镇饮用水水源地水质的监测数据,使用美国EPA推荐的健康风险评价模型,对水源地13项水质指标进行了健康风险评价,使用序贯指示模拟(SIS)对水源地健康风险进行了空间不确定性分析。结果表明:水源地对成人及儿童的非致癌风险、儿童致癌风险均较小,对成人具有一定致癌风险;F~-、As、NO_(3)~-、Pb四项指标对非致癌总风险的累计贡献度超过90%,Cr^(6+)和As两项指标对致癌总风险的累计贡献度超过95%;成人致癌风险概率>75%的区域面积为140.54 km~2,占中江县总面积的6.4%,致癌风险概率在25%~75%的区域面积为333.28 km~2,约占中江县总面积的15.2%;根据成人致癌风险概率及其标准差,将中江县水源地划分成优先、重点、一般三级管控区,提出了分区风险管控建议。
In order to analyze the health risk level of water sources in Zhongjiang County,water quality monitoring data of drinking water sources in 60 towns in the study area were collected.The health risk evaluation model recommended by the USEPA was used to evaluate 13 water quality indexes.The sequential indicator simulation method (SIS) was adopted to analyze the spatial uncertainty of health risk of the water sources.The results showed that the non-carcinogenic risk of water source for adults and children and the carcinogenic risk of children were small,and there is a certain carcinogenic risk for adults.The cumulative contribution of F^(-)、As、NO_(3)^(-)、and Pb to the total non-carcinogenic risk exceeded 90%,and the cumulative contribution of Cr^(6+) and As to the total carcinogenic risk exceeded 95%.Adult carcinogenic risk probability greater than 75 % of the area was140.54km~2,accounting for 6.4% of the total area of Zhongjiang County,adult carcinogenic risk probability ranging from 25% to 75% of the area is 333.28km~2,accounting for about 15.2% of the total area.According to the adult carcinogenic risk probability and its standard deviation,the water source area of Zhongjiang County is divided into threelevel control areas,namely priority,key,and general.The zoning risk control suggestions were put forward.In this study,SIS method was introduced to analyze the spatial uncertainty of health risk,which could provide more intuitive and accurate basis for water source risk management for management decision-makers.
作者
林正江
高东东
肖杰
陈亚平
董坤
韦娅俪
LIN Zheng-jiang;GAO Dong-dong;XIAO Jie;CHEN Ya-ping;Dong Kun;WEI Ya-li(Faulty of Geosciences and Environmental Engineering,Southwest Jiaotong University,Chengdu Sichuan 610031,China;不详)
出处
《环境科学导刊》
2022年第5期70-76,共7页
Environmental Science Survey
基金
四川省环境保护专项项目“四川省水污染防治技术水平与绩效评估”
四川省科技计划(2021JDZH0030)。
关键词
水源地
健康风险评价
序贯指示模拟
风险分区管控
water source area
health risk assessment
sequential indicator simulation
risk division control
作者简介
林正江(1997-),男,汉族,湖北孝感人,硕士研究生,主要从事环境工程研究;通信作者:高东东(1984-),男,汉族,河北张口人,博士,工程师,主要从事水文地质、水资源水环境研究。
