林州-安阳地区地下水三氮分布特征及其影响因素

本文分析了林州-安阳地区地下水的三氮分布特征,探讨了氮污染来源。运用Piper三线图、SPSS20软件,综合分析地下水化学特征,揭示氮循环作用机理。结果表明,研究区西北部主要为HCO_3-Ca-Mg型水,东部平原主要为HCO_3-Ca-Mg型水,其次为HCO_3-SO_4-Ca-Mg型、HCO_3-Cl-Ca型和HCO_3-Cl-Mg-Ca型水;氮污染源主要分布于林州市北部、安阳县北部、安阳市的东南部地区,其中农事活动、附近养殖场的畜禽排泄及污水排放是主要来源;地下水中存在着反硝化作用等氮的迁移转化现象,但是氮主要来源于附近的污染源。

Nitrogen Distribution in Groundwater of Linzhou-Anyang Area and Its Affecting Factors

The paper deals with nitrogen distribution in groundwater and the sources of nitrogen pollution in Linzhou-Anyang area. Based on methods of Piper graph and SPSS 20 software, groundwater geochemical characteristics and nitrogen cycling were also studied. Results show that the main geochemical type of groundwater in the northwest of the study area is HCO₃-Ca-Mg, while the main geochemical type of groundwater in the eastern plains is HCO₃-Ca-Mg and the secondary types are HCO₃-SO₄-Ca-Mg, HCO₃-Cl-Ca and HCO₃-Cl-Mg-Ca. The sources of groundwater nitrogen pollution are mainly distributed in the north of Linzhou City and Anyang Country, as well as the southeast of Anyang City. Moreover, farming activities, excretion of livestock and sewage disposal are considered as the main sources for nitrogen pollution. The phenomenon of nitrogen migration and transformation existing in groundwater and denitrification is found in groundwater, but nitrogen mainly comes from the contribution of pollution sources.