基于空间分析荞麦地流域地下水健康风险评价  

Groundwater health risk assessment based on spatial analysis in the Qiaomaidi watershed

作　　者：张勇 郭纯青[2] 孙平安[1] 朱彦光 于奭[1] ZHANG Yong;GUO Chun-qing;SUN Ping-an;ZHU Yan-guang;YU Shi(Key Laboratory of Karst Dynamics,Ministry of Land and Resource,Guangxi Zhuang Autonomous Region,Institute of Karst Geology,Chinese Academy of Geological Sciences,Guilin 541004,China;Guilin University of Technology,School of Environmental Science and Engineering,Guilin 541000,China)

机构地区：[1]中国地质科学院岩溶地质研究所,自然资源部广西壮族自治区岩溶动力学重点实验室,广西桂林541004 [2]桂林理工大学环境科学与工程学院,广西桂林541000

出　　处：《中国环境科学》2019年第11期4762-4768,共7页China Environmental Science

基　　金：国家重点研发计划(2016YFC0502302);广西自然科学基金资助项目(2016GXNSFBA380174,2017GXNSFFA198006);国家自然科学基金资助项目(41402324,41402238);中国地质调查项目(DD20160305,DD20160324)

摘　　要：以云南荞麦地流域为研究区域,对该区域2017年24个地下水样品中5种重金属指标(Cr、Pb、Co、Mn、Hg)和1种无机毒理指标(氟化物)进行测定和分析,并基于半方差模型等地学统计方法,对地下水健康风险评价进行空间分析.结果表明:地下水通过饮水途径所引起的成人和儿童的健康风险分别为9.27×10^-10~4.59×10^-5a^-1和1.10×10^-8~5.46×10^-4a^-1.地下水健康风险评价值以Cr为主导,成人与儿童存在较高的一致性.地下水健康风险存在很强的空间规律性,在南北方向上呈条带状分布.受位于中游的药山镇影响,研究区南部下游地区地下水健康风险显著增加.Concentration of five metals,Cr,Pb,Co,Mn,Hg and one inorganic toxicological index,fluoride from twenty-four samples collected from groundwater in the Qiaomaidi watershed were measured and analyzed.Based on the semi-variance model and other geostatistical methods,the distribution characteristics of the groundwater health risk assessment were analyzed.The health risks of adults and children through drinking pathway were 9.27×10^-10~4.59×10^-5a^-1 and 1.10×10^-8~5.46×10^-4a^-1,respectively.The groundwater health risks were dominant by Cr,and were consistent for adults and children.The distribution of the health risks was spatial regularity,and presented as a strip from south to north.Influenced by the Yaoshan town located in the middle of the watershed,the health risks increased remarkably in the south which was the downstream.

关 键 词：农药 地下水健康风险评价 成人与儿童 空间特征 半方差模型 荞麦地 

分 类 号：X523[环境科学与工程—环境工程]