摘要
在地下水采样分析基础上,采用模糊聚类分析法、主成分分析法及相关分析法,对北京昌平区地下水水质污染成因进行识别。结果表明,昌平区地下水水质可以分为天然型、污染型、污染-超采型三种成因类型;地下水中主要超标物为氮素、总硬度、TDS和氟化物,超标率分别为15.79%、10.53%、10.53%和5.26%;氮素包括硝氮、亚硝氮和氨氮,主要来源于污染物输入,其存在形式与水文地质条件及污染物输入量有关;总硬度和TDS则由污染和地下水超采共同造成;氟化物由原生作用形成。
This paper investigated the causes of groundwater pollution in Changping District using the fuzzy cluster analysis,principal component analysis,and correlation analysis based on groundwater sampling analysis.The results showed that the groundwater quality types can be divided into three categories：natural type,pollution type,and pollution-overexploitation type;the major over standard indicators are nitrogen,total hardness,TDS,and fluoride with the exceeding rates of 15.79%,10.53%,10.53%,and 5.26% respectively;the nitrogen pollution includes nitrate,nitrite,and ammonia and is mainly from the input of pollutants,and the pollution forms of nitrogen are related to the hydrogeological conditions and amount of input contaminants;over standard total hardness and TDS are caused by the pollution and overexploitation;and fluoride is from the geological evolution.
出处
《南水北调与水利科技》
CAS
CSCD
北大核心
2015年第2期252-256,338,共6页
South-to-North Water Transfers and Water Science & Technology
基金
北京市环境保护局"地下水环境功能区划定方案项目"(HCZB-2012-BJ1188)
关键词
模糊聚类
地下水
污染
北京昌平
fuzzy clustering
groundwater
pollution
Changping of Beijing
