Analysis on hydrochemical characteristics and formation mechanism of groundwater in Qinzhou Port Area, Guangxi, China
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摘要: 为查明钦州港地区地下水水化学特征及形成作用,本文分枯水期、丰水期采集了钦州港地区68组浅层地下水样,测试Na+、Ca2+、Mg2+、HCO3-、Cl-、SO42-和总溶解固体(TDS)等化学指标并进行了相关分析。结果表明:①季节变化对地下水水化学空间变异性影响较小;②地下水水化学类型以Ca-Mg-SO4-Cl型为主,主要从Ca-Mg-HCO3型和Na-Cl-SO4型向Ca-Mg-SO4-Cl型演化;③地下水水化学成分主要通过溶滤作用、阳离子交换吸附作用、蒸发浓缩等形成,人类活动对地下水的影响越来越重要,导致了地下水化学成分不断发展变化。Abstract: For further revealing the hydrochemical characteristics of groundwater and the hydrochemical pro-cesses, 68 sets of shallow groundwater were collected during dry season and rain season in Qinzhou Port to mea-sure Na+、Ca2+、Mg2+、HCO3-、Cl-、SO42- and TDS, and studied hydrochemical characteristics and formation mecha-nism. The results show that seasonal variation has less influence on the spatial variation. The main hydrochemical types of groundwater is Ca-Mg-SO4-Cl, and evolve from Ca-Mg- HCO3 type and Na-Cl-SO4 type to Ca-Mg-SO4-Cl type. The groundwater hydrochemical composition is formed by weathered-leached effects, ion-exchange adsorption and evaporation concentration. The impact of human activity on groundwater is increas-ing important, and the groundwater hydrochemical composition is keeping development and change.
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Key words:
- Qinzhou port /
- groundwater /
- hydrochemical characteristics
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