[关键词]
[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2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。
[Key word]
[Abstract]
This paper inv estigated t he causes of gr oundw ater po llution in Changping Dist rict using the fuzzy cluster analysis, pr incipa l component analy sis, and cor relation analy sis based o n g ro undwater sampling analysis. T he r esults showed that the gr oundwat er quality t ypes can be div ided into thr ee categ or ies: natural t ype, pollution ty pe, and po llut ion2ov erex ploit at ion ty pe; the major o ver standar d indicat ors are nitro gen, to tal hardness, T DS, and fluo ride w ith the ex ceeding rat es of 15. 79%, 10. 53%, 10. 53%, and 5. 26% r espectively; the nitro gen pollutio n includes nitrate, nit rite, and ammonia and is ma inly from the input of pollutants, and the pollution forms of nitrog en are related to the hydrogeological conditions and amount of input contaminants; o ver standard total hardness and TDS ar e caused by the pollution and overex plo itation; and fluoride is from the g eo logical evo lution.
[中图分类号]
[基金项目]
北京市环境保护局/ 地下水环境功能区划定方案项目0 (H CZB220122BJ1188)