滹沱河冲洪积扇地下水硝酸盐的污染特征及污染源解析

发布时间：2018-03-06 14:13

本文选题：地下水　切入点：超采　出处：《水文地质工程地质》2017年06期 　论文类型：期刊论文

【摘要】：为研究滹沱河冲洪积扇地区地下水硝酸盐污染机制,对滹沱河冲洪积扇地区地下水和地表水进行了采样监测,运用环境健康风险评价模型对研究区硝酸盐进行评价,采用水化学和多元统计方法研究了滹沱河冲洪积扇地区地下水硝酸盐污染问题。结果表明:研究区地表水NO-3污染较轻,NO-3均值为19.54 mg/L,所有水样均未超出我国地表水环境质量标准(45 mg/L);但是,地下水已经受到了NO-3的严重污染,NO-3均值为75.84 mg/L,且有30.43%水样超出我国地下水质量标准(88.6 mg/L)。研究区3个水文地质单元地下水硝酸盐的平均个人年健康风险分别为4.94×10-8、1.99×10-8和2.61×10-9,低于国际辐射防护委员会(ICRP)推荐的最大可接受风险水平(5.0×10-5/a),因此,认为不会对人群构成严重危害。水文地质单元和地下水埋深对硝酸盐污染有显著影响,但是,土地利用类型对硝酸盐浓度的影响不显著。滹沱河冲洪积扇地区地下水硝酸盐的主要污染来源是生活污水和化肥。此外,强烈开采地下水也是该地区NO-3污染的诱因。
[Abstract]:In order to study the nitrate pollution mechanism of groundwater in Hutuo River alluvial fan area, the groundwater and surface water in Hutuo River alluvial fan area were sampled and monitored, and the nitrates in the study area were evaluated by using the environmental health risk assessment model. The nitrate pollution of groundwater in Hutuo River alluvial fan area was studied by means of hydrochemistry and multivariate statistics. The results showed that the average value of NO-3 pollution in surface water was 19.54 mg / L, and all water samples did not exceed the surface water in China. The environmental quality standard is 45 mg / L; but, The mean value of no-3 in groundwater that has been seriously polluted by NO-3 is 75.84 mg / L, and 30.43% water samples exceed China's groundwater quality standard: 88.6 mg / L. The average annual health risks of nitrate in groundwater of three hydrogeological units in the study area are 4.94 脳 10 ~ (-8) ~ 1.99 脳 10 ~ (-8) and 1.99 脳 10 ~ (-8), respectively. 2.61 脳 10-9, below the maximum acceptable risk level recommended by the International Commission on Radiological Protection (ICRP) of 5.0 脳 10 ~ (-5) / a, so, Hydrogeological units and groundwater depth have significant effects on nitrate pollution, however, The main sources of nitrate pollution of groundwater in Hutuo River alluvial fan area are domestic sewage and chemical fertilizer. In addition, the strong exploitation of groundwater is also the inducement of NO-3 pollution in this area.
【作者单位】：中国地质科学院水文地质环境地质研究所;清华大学附属中学;
【基金】：中国地质科学院基本科研业务费(SK201612,SK201707) 国家自然科学基金资助项目(41401593,41602268) 河北省石家庄市财政拨款项目(B201504)
【分类号】：X523

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