摘要
查明防城区地下水水化学特征及主要离子来源,对该地区地下水资源保护和开发利用具有重要意义。以防城区地下水为研究对象,通过分析水化学组分和氢氧同位素特征,研究地下水水化学特征,确定补给来源,识别其主要组分的物质来源。研究结果表明:研究区地下水水化学类型主要为HCO_3-Mg·Ca型、SO_4·Cl-Ca·Mg型和SO_4·Cl-Na型,阳离子以Ca^(2+)和Na^+为主,阴离子以HCO_3^-和SO_4^(2-)为主。同位素分析显示,研究区地下水以大气降水补给为主。Ca^(2+)、Mg^(2+)、HCO_3^-主要来源于碳酸盐岩的溶解,而高位养殖、农业活动、工业排污等导致地下水中SO_4^(2-)、Na^+、K^+、Cl^-、NO_3^-含量增加。
Understanding of hydrochemical characteristics and ion source of groundwater in Fangcheng district,Guangxi province is important for protection and sustainable utilization of groundwater in this area. Hydrohemical components and hydrogen and oxygen isotopic data of the groundwater in the Fangcheng district are obtained to study the hydrochemical characteristics, determine the recharge source of the groundwater, identify the origin of major components in the groundwater. The results show that the main hydrochemical type of the groundwater in the study area are HCO3-Mg·Ca type,SO4·Cl-Ca·Mg type and SO4·Cl-Na type. The major chemical components of the groundwater are Ca^2＋, Na^＋, HCO3-and SO4^2-.The hydrogen and oxygen isotopic data demonstrates that the groundwater in the study area recharges from precipitation, Ca^2＋, Mg^2＋, HCO3-are mainly derived from the dissolution of carbonate rocks in the aquifer, and high breeding, agriculture and industrial pollution lead to the concentration of SO4^2-,Na^＋,K^＋,Cl^-,NO3-increased.
出处
《华南地质与矿产》
CAS
2017年第2期162-168,共7页
Geology and Mineral Resources of South China
基金
中国地质调查局项目"环北部湾南宁
北海
湛江1:5万环境地质调查"(121201009000150020)
关键词
地下水
水化学
离子来源
防城区
groundwater
hydrochemical characteristics
ion source
Fangcheng district
Guangxi
