吉林市城区地下水污染时空演化_危润初.pdfVIP

中国环境科学 2014,34(2) ：417~423 China Environmental Science 吉林市城区地下水污染时空演化 * 危润初, 肖长来 ,梁秀娟 (吉林大学地下水资源与环境教育部重点实验室,吉林 长春 130021) 摘要：通过提出投影寻踪地下水污染指数模型,求得吉林市城区 1980~2009 年地下水监测井的污染指数.同时考虑第二松花江两岸地下水 污染的非连续性,用修正的局部多项式插值方法对各年污染指数进行分区插值,得到各年地下水污染指数分布图.结果表明,吉林市城区地 下水受到不同程度的污染,地下水污染指数普遍偏高,江北片区污染最为严重.全区在时间演化上具有“轻-重-轻” 的阶段特征,地下水污染 空演化规律与人类活动方式紧密联系.吉林市城区地下水主要污染因子为“三氮”,其中 NO2-对地下水污染的影响最大,对地下水污染指数的 贡献度多年保持在 0.7 上下. 关键词：吉林市；投影寻踪；地下水污染指数；修正局部多项式；时空演化 中图分类号：X523 文献标识码：A 文章编号：1000-6923(2014)02-0417-07 * Spatio-temporal evolution of groundwater pollution in the urban areas of Jilin City. WEI Run-chu, XIAO Chang-lai , LIANG Xiu-juan (Key Laboratory of Groundwater Resources and Environment, Ministry of Education, Changchun 130021, China). China Environmental Science, 2014,34(2)：417~423 Abstract ：Projection pursuit method was adopted to establish groundwater pollution index model. Correspondingly, groundwater pollution indexes of monitoring wells from 1980 to 2009 were calculated. Considering the non-continuity of groundwater pollution between the both sides of Songhua River, modified local polynomial was used to complete interpolation of pollution indexes sub-regionally. Then distribution maps of groundwater pollution indexes from 1980 to 2009 showed. The results showed that, groundwater was contaminated in all districts with different severities for region-widely high groundwater pollution indexes, especially in Jiangbei district. The groundwater pollution in all districts revealed a ight-severe-light character in the time revolution. Spatio-temporal evolution of groundwater pollution in this region was closely linked with human