松嫩平原地下水氮污染空间变异性及健康风险评价  

Spatial variability and health risk assessment of nitrogen pollution in groundwater in Songnen Plain

作　　者：卞建民[1,2] 张真真[1,2] 韩宇[1,2] 

机构地区：[1]吉林大学环境与资源学院,长春130021 [2]吉林大学地下水资源与环境教育部重点实验室,长春130021

出　　处：《重庆大学学报（自然科学版）》2015年第4期104-111,共8页Journal of Chongqing University

基　　金：国家自然科学基金项目(41072255);东北地方病严重区地下水砷;氟及矿化度赋存及分布规律研究(1212010634701)~~

摘　　要：为探明松嫩平原地下水污染现状及氮污染影响,利用地统计学软件分析了"三氮"(硝态氮、亚硝态氮和铵态氮)含量的特征,采用ArcGIS绘制了地下水硝态氮的变异函数图和空间分布图,并应用健康风险评价模型进行了氮污染对人体的潜在健康风险评价。上述研究表明,该区地下水污染物以"三氮"最为突出,其中硝态氮污染最重,变异系数为1.686,属于强变异,含量分布与二阶球状模型拟合最好,块金值和基底效应分别为2.423和0.575,其含量的空间异质性是结构性因素及随机性因素共同造成的,随机性因素稍强;硝态氮污染高风险区占总面积的88.78%,主要分布在东中部高平原区,这一区域大部分为III类水,对人体健康存在较高的风险,应引起关注。In order to present the pollution distribution and influence of nitrogen in groundwater in Songnen Plain,characteristics of nitrate-nitrogen,nitrite-nitrogen,and ammonium-nitrogen are analyzed by statistics software.Semivariograms graph and spatial distribution maps of groundwater nitrate-nitrogen are described by ArcGIS.Then the risk of groundwater nitrate-nitrogen to human health is evaluated by the model of water environmental health risk assessment.The results show that the nitrate-nitrogen is the most serious pollution in groundwater and has a strong spatial variability（variation coefficient of it is 1.686）.The groundwater nitrate-nitrogen fits the second spherical model well and the nugget is 2.423,the substrate effect is 0.575,which implies that nitrate-nitrogen concentration distribution is controlled by structural factors and random factors and the later has a stronger effect.The high risk of nitrate-nitrogen pollution mainly distributes in east and central high plain,which accounts for 88.78% of the total area.It should be paid more attention because the water in this region are mostly third class of water quality and has high risk to human health.

关 键 词：地下水 硝态氮 空间变异 健康风险评价 

分 类 号：Q689[生物学—生物物理学] S129[农业科学—农业基础科学]