福建泉港区浅层地下水水化学特征及水质综合评价

摘要

福建泉港区作为现代化港口城市,研究浅层地下水化学特征,进行地下水水质综合评价有利于水资源可持续利用.对福建省泉港区浅层地下水水化学特征等指标进行统计分析,运用数理统计方法对浅层地下水水化学特征和水质进行综合评价分析可知,该区水中Na+、K+、Mg2+、Cl-、NO2-、NO3-指标变异系数大于100%,是受外界影响的敏感因子,TDS、总硬度、Ca2+等其他指标CV%较小,受外界影响较小.根据Durov图,该区水化学类型以Cl-·HCO3-+Na+·Ca2+型为主.最后参照《地下水质量标准》做水质综合评价,结果表明该区水质整体较差,处于(Ⅳ、Ⅴ类水平)占86.4%,超标因子主要为NO3-、NO2-及部分重金属为主,超标因子与该地区的石化工业污水排放、农业生产、生活污水乱排有关.%Quangang Fujian as a modern port city, study the chemical characteristics of shallow groundwater and comprehensively evaluates groundwater quality, which is conducive to the sustainable use of water resources.We statistically analyzed the chemical characteristics of shallow groundwater in Quangang area of Fujian province and synthetically evaluated and analyzed chemical characteristics and water quality of shallow groundwater by means of mathematical statistics.we know that in the Water area Na+,K+,Mg2+,Cl-,NO2-,NO3-that coefficient of variation was greater than 100% is sensitive factors affected by the outside world.TDS, total hardness, Ca2+ index and so on that less affected by the outside world CV% is smaller.According to drove diagram, chemistry types of in Water is based on Cl-·HCO3-+Na+·Ca2+.Finally, we marked a comprehensive evaluation of water quality with referencing to 《groundwater quality standard》.The results show that the water quality is poor, in (IV, V class level) accounted for 86.4%,the main factors that excessive factors associated about the region's petrochemical industrial wastewater discharge, agricultural production, domestic sewage disorderly row, mainly were NO3-, NO2-and heavy metals.