济南市先行区浅层地下水水文地球化学特征

Shallow Groundwater Hydrogeochemical Character of Jinan Pioneering Zone

地下水化学特征可以反映地下水的历史演变过程。根据济南新旧动能转换先行区水质分析结果,研究了浅层地下水化学类型、离子相关性、水化学类型平面分布和剖面演化特征,结果表明:研究区浅层地下水阴离子以HCO_(3)型为主;济南段黄河水阴离子为HCO_(3)·SO_(4)型,由于黄河水侧渗补给研究区浅层地下水,因此研究区HCO_(3)·SO_(4)型地下水大面积分布;垃圾渗滤液、生活污水、工业废水下渗,导致地下水SO^(2-)_(4)、Cl^(-)质量浓度升高;禽畜养殖、农药化肥施用是导致先行区浅层地下水出现HCO_(3)·NO_(3)型水的重要因素;研究区浅层地下水化学类型复杂是蒸发作用、溶滤作用、混合作用及人类活动等多种作用复合的结果。

The chemical characteristics of groundwater can reflect its historical evolution.Based on the analysis results of groundwater sam⁃ples in the study area,and analyzed the groundwater chemistry types,ion correlation,water chemistry type plane distribution and profile evo⁃lution,we conclude that shallow groundwater anions are HCO_(3) mainly in study area.The water anion of the Yellow River in Jinan section is HCO_(3)·SO_(4),the Yellow River water infiltrates and supplies the shallow groundwater,leading to large area distribution of HCO_(3)·SO_(4) type groundwater in the study area.Landfill leachate,domestic sewage and industrial wastewater infiltration lead to a further increase of SO_(2-)^(4) and Cl^(-)in shallow groundwater;poultry and livestock breeding,pesticide and chemical fertilizer application are important factors leading to the appearance of HCO_(3)·NO_(3) type in shallow groundwater.The formation of hydrogeochemical characteristics of shallow groundwater is a combi⁃nation of evaporation,leaching and mixing in study area.