摘要
乾安县地下水主要有第四系孔隙潜水、第四系孔隙承压水、上第三系裂隙孔隙承压水。研究区地下水水化学具有时空变化特征。空间分布特征分为水平分布特征和垂向分布特征。水平分布特征是:随着地理位置和地质构造的不同,不同层位的地下水水化学类型呈现不同的变化规律。垂向分布特征为:第四系孔隙潜水水化学类型比较复杂,而第四系孔隙承压水水化学类型比较简单,上第三系裂隙孔隙承压水水化学类型趋于单一化。根据研究区32个观测井的多年观测资料(以中部9号观测井为例),结合多年气象观测资料对第四系孔隙潜水和第四系孔隙承压水的地下水中主要离子成分和次要离子成分多年变化特点进行分析比较,得出地下水水质的多年变化特点以及形成原因。
Groundwater types are composed of Quaternary pore phreatic water, Quaternary pore confined water and pore-fissure water. Groundwater hydrochemistry in the study area is temporal and spatial variations. Spatial variations include horizontal and vertical distribution characteristics. The characteristics of Horizontal distribution are that with variety of geographic position, geologic structure, groundwater hydrochemical types in different aquifer represents different variable regular rules. The characteristics of vertical distribution are that the hydrochemical type of Quaternary pore phreatic water is complex, and Quaternary pore confined water is simpler and pore-fissure water is simplified. According to perennial observation data of thirty two observation wells in study area （as a example of the ninth well） and combined with perennial weather data, we analysis the secular changing characteristics of basis ions and secondary ions in Quaternary pore phreatic water and Quaternary pore confined water. And we get the secular changing characteristics and the cause of quantity of groundwater.
出处
《吉林水利》
2006年第1期32-35,共4页
Jilin Water Resources
基金
中国地质调查局项目(2003104001)
吉林省科技攻关项目(20020401)
吉林大学创新基金项目(450011022249)。
关键词
地下水
水化学特征
水质
多年变化
时空变化
groundwater
hydrochemical characteristics
water quality
secular change
