江西省鹰潭市地下水水化学类型变化与成因

Evolution and genesis of groundwater hydrochemical types in Yingtan of Jiangxi

根据2013年鹰潭市地下水样品采集和测试结果,利用舒卡列夫分类法绘制出地下水水化学类型分布图,该地区地下水水化学类型变化显著。与1986年相比,2013年研究区HCO3-Ca、HCO3-Na+Ca和HCO3-Ca+Mg型地下水完全消失;1986年HCO3+Cl-Na+Ca型地下水仅仅分布于鹰潭市区附近,而在2013年该类型地下水分布广泛;2013年,研究区新出现SO4+Cl-Na+Ca、HCO3+SO4+Cl-Na+Ca、HCO3+Cl-Na+Mg和HCO3+Cl-Ca+Mg型地下水。造成这种现象的主要原因是该地区近年来酸雨频发、工业污染物排放以及酸雨-基岩相互作用的影响。

The groundwater hydrochemical types are comprehensive index of chemical characteristics.The chan-ges of groundwater hydrochemical types in Yingtan provide a good understanding of regional groundwater quality changes by groundwater sample collection and tests in 2013.The map of groundwater hydrochemical types by Shukaliefu taxonomy,discovered the groundwater hydrochemical types significantl change in the area.In com-parison with 1986’s,the HCO3 -Ca,HCO3 -Na +Ca and HCO3 -Ca +Mg type groundwater disappeared in 2013 in the studied area.The HCO3 +Cl -Na +Ca type groundwater distributed near the city of Yingtan in 1986,but that type groundwater is widely distributed in 2013.SO4 +Cl -Na +Ca,HCO3 +SO4 +Cl -Na +Ca,HCO3 +Cl -Na +Mg and HCO3 +Cl -Ca +Mg types groundwater appeared.It is believed that the main reasons for this phenomenon are the frequent acid rain,industrial pollutions and the interaction between acid rain and bedrock.