松嫩平原地下水氮污染空间变异性及健康风险评价
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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)。


Spatial variability and health risk assessment of nitrogen pollution in groundwater in Songnen Plain
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Supported by National Natural Science Foundation of China(41072255) and Occurrence and Distributive Regularity of As, F and Salinity of Groundwater in Northeast Endemic Area(1212010634701).

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    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。

    Abstract:

    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.

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卞建民,张真真,韩宇.松嫩平原地下水氮污染空间变异性及健康风险评价[J].重庆大学学报,2015,38(4):104-111.

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  • 收稿日期:2015-03-06
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  • 在线发布日期: 2015-08-06
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