宁夏平罗县平原区潜水水化学特征分析及成因  

Hydrochemical Characteristics Analysis and Origin of Plain Phreatic Water in Pingluo County of Ningxia

作　　者：冯波 唐莲[1] FENG Bo;TANG Lian(School of Civil Engineering and Hydraulic Engineering,Ningxia University,Yinchuan 752100,China)

机构地区：[1]宁夏大学土木与水利工程学院,宁夏银川752100

出　　处：《水文》2020年第4期73-78,60,共7页Journal of China Hydrology

基　　金：宁夏2018重点研发计划项目(2018BEG03008);宁夏高等学校一流学科(水利工程学科)项目(NXYLXK2017A03);国家自然科学基金项目(51269022)。

摘　　要：研究地下水化学特征及成因,可为地下水资源评价及水生态环境保护提供依据。采用Piper三线图、主要离子空间分布图、Pearson相关性分析、Gibbs图、主要离子比例图和氯碱指数图的方法对平罗县平原区潜水水化学特征及成因进行研究分析。结果表明:(1)研究区潜水整体上呈微咸水、极硬水;(2)研究区内潜水阳离子主要为钠离子,阴离子主要为重碳酸根,水化学类型为HCO3-Na型水;(3)蒸发岩和硅酸盐矿物是研究区潜水的主要离子来源;(4)研究区的地下水化学成分成因主要受蒸发浓缩、岩石风化、溶滤、阳离子交换作用影响和人类活动影响。This study focused on the chemical characteristics and origin of groundwater,and provided the basis for the evaluation of groundwater resources and the protection of water ecological environment.The chemical characteristics and origin of plain phreatic water in Pingluo county of Ningxia Province were analyzed by the Piper,spatial distribution of main ions,Pearson correlation analysis,Gibbs diagrams,proportion diagram of major ion and alkali index.The results suggest that(1)the phreatic water is slightly salty and extremely hard water as a whole.(2)The major cation and anion of phreatic water are Na+and HCO3-,respectively,while the major hydrochemical type is HCO3-Na.(3)The chemical composition of phreatic water majorly originates from the evaporate minerals and silicate minerals.(4)The formation of the hydrochemical characteristics of the phreatic water is mainly influenced by the evaporation concentration,rock-weathering dissolution,mineral dissolution,cation exchange adsorption and human activities.

关 键 词：平原区 潜水 水化学特征 成因 

分 类 号：P342[天文地球—水文科学]