广汉市平原区浅层地下水化学演化及其控制因素

doi:10.13278/j.cnki.jjuese.201603205

吉林大学学报(地球科学版) ›› 2016, Vol. 46 ›› Issue (3): 831-843.doi: 10.13278/j.cnki.jjuese.201603205

广汉市平原区浅层地下水化学演化及其控制因素

陈盟, 吴勇, 高东东, 常鸣

成都理工大学地质灾害防治与地质环境保护国家重点实验室, 成都 610059

收稿日期:2015-10-03 出版日期:2016-05-26 发布日期:2016-05-26
通讯作者: 吴勇(1966),男,教授,博士生导师,主要从事地下水资源、地下水的脆弱性与地下水有关的生态系统以及放射性核素迁移地球化学等方面的研究,E-mail:ywu@cdut.edu.cn E-mail:ywu@cdut.edu.cn
作者简介:陈盟(1986),男,博士研究生,主要从事地下水资源、环境水文地质和生态水文地质等方面的研究,E-mail:cattlepen@163.com
基金资助:
地质灾害防治与地质环境保护国家重点实验室自主研究课题（SKLGP2009Z006）；四川省科技厅科技支撑计划项目（2011SZ0172）

Shallow Groundwater Hydrogeochemical Evolution Process and Controlling Factors in Plain Zone of Guanghan City

Chen Meng, Wu Yong, Gao Dongdong, Chang Ming

State Key Laboratory for Geo-Hazard Prevention and Geo-Environment Protection, Chengdu University of Technology, Chengdu 610059, China

Received:2015-10-03 Online:2016-05-26 Published:2016-05-26
Supported by:
Supported by State Key Laboratory for Geohazard Prevention and Geoenvironment Protection Project (SKLGP2009Z006) and Key Technology R & D Program of Science and Technology Department of Sichuan Province(2011SZ0172)

摘要/Abstract

摘要：

为在广汉市城乡规划过程中提供地下水资源开发利用的基础信息，采用矿物风化系统分析、相关性分析、主成分分析和PhreeQC反向水文地球化学模拟等方法对广汉市平原区的浅层地下水的地下水水化学组分进行分析，确定了浅层地下水的水化学演化及控制因素，完成了地下水资源的质量及时空分布特征分析。分析表明：Gibbs图显示岩石风化主导该区地下水水化学特征，风化过程产生离子和次生矿物又经历水解作用，在矿物风化系统稳定场图中显示水样中铝硅酸盐矿物逐渐趋于溶解，碳酸盐矿物处于饱和状态；PhreeQC反向水文地球化学模拟结果显示在水流模拟路径上主要发生了钙蒙脱石、钾长石溶解和高岭石、石英、钠长石的沉淀，以及Ca-Na₂之间的阳离子交换吸附作用；离子相关性和主成分分析进一步的验证了溶滤作用、蒸发浓缩作用和阳离子交换吸附作用是引起浅层地下水水化学过程和矿物组成改变的主要原因。研究区地下水水质总体不会对人体健康造成不良影响。

关键词: 广汉市, 水化学演化, 水岩作用, 主成分分析, 反向水文地球化学模拟, 地下水水质

Abstract:

Four methods, including mineral weathering system analysis, correlation analysis, principal component analysis and inverse hydrogeochemical simulation by PhreeQC are used to analyse the chemical composition, identify hydrogeochemical evolution processes and controlling factors, then complete analyzing quality and spatial temporal distribution of shallow groundwater in the plain of Guanghan City, which provides basic data for developing and utilizing groundwater resources exsisting in urban and rural planning process. The analysis showes that Gibbs plots indicate that the groundwater hydrochemical characteristics are dominated by rock weathering, the weathering processes produce ions and then secondary minerals undergo hydrolysis; aluminosilicate minerals of water samples tend to dissolve gradually in the mineral weathering system stability diagram; carbonate minerals are saturated. PhreeQC inverse hydrogeochemical simulation results show what mainly happen in the water flow path simulation are the dissolution of calcium montmorillonite and K-feldspar, the precipitation of kaolinite, quartz and albite, and the cation exchange adsorption between Ca-Na₂; The analysis of ion correlation and principal component analysis verifies that leaching, evaporation and concentrating, and cation exchange adsorption are the main cause of hydrochemical process and mineral composition in the shallow groundwater. The groundwater quality in the study area generally will not cause adverse effects on human health.

Key words: Guanghan City, hydrogeochemical evolution, water-rock interaction, principal component analysis, inverse hydrogeochemical simulation, groundwater quality

中图分类号:

P641.3

陈盟, 吴勇, 高东东, 常鸣. 广汉市平原区浅层地下水化学演化及其控制因素[J]. 吉林大学学报(地球科学版), 2016, 46(3): 831-843.

Chen Meng, Wu Yong, Gao Dongdong, Chang Ming. Shallow Groundwater Hydrogeochemical Evolution Process and Controlling Factors in Plain Zone of Guanghan City[J]. Journal of Jilin University(Earth Science Edition), 2016, 46(3): 831-843.

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广汉市平原区浅层地下水化学演化及其控制因素

Shallow Groundwater Hydrogeochemical Evolution Process and Controlling Factors in Plain Zone of Guanghan City

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