摘要
为研究青铜峡市北部不同深度地下水水化学特征及其成因,对青铜峡市北部共采集水样115组,其中0~20 m浅层地下水样70组,40~150 m潜水样44组,黄河水水样1组。综合运用数理统计、相关分析、Gibbs图、离子比例系数等方法,分析了研究区不同深度地下水水化学类型空间分布,讨论了不同深度地下水水化学演化过程及其主要控制因素。结果表明:①不同深度地下水中主要阳离子均为Na^+和Ca^2+,主要阴离子均为HCO^3-和SO4^2-;地下水溶解性总固体较低,但硬度均偏高。②0~20 m浅层地下水主要离子的形成主要受岩盐溶解、碳酸盐矿物风化溶解、蒸发浓缩作用、阳离子交换作用共同影响,碳酸、硫酸参与了碳酸盐溶解过程;40~150 m潜水主要受岩盐溶解、硅酸盐矿物风化溶解、石膏溶解、阳离子交换作用共同影响。
To study the chemical characteristics and formation mechanism of groundwater at different depths in the north of Qingtongxia,115 samples are collected including 70 shallow groundwater samples with depth of 0~20 m,44 phreatic water samples with depth of 40~150 m and 1 Yellow River water sample.The distribution characteristics of the hydrochemistry and major controlling factors of hydrochemical evolution processes of groundwater with different depths in the study area are analyzed using mathematical statistics,correlation analysis,Gibbs plots,and ion ratios.The results show that:①The major cations and anions of groundwater in different depth in the study area are both Na^+,Ca^2+,HCO^3-and SO4^2-.The total dissolved solids of groundwater are lower,but the hardness is higher.②The major ions of groundwater with depth of 0~20 m are mainly affected by rock salt dissolution,carbonate mineral weathering and dissolution,evaporation,and cation exchange.Sulfuric acid and carbonic acid are involved in carbonate mineral weathering and dissolution.Phreatic water with depth of 40~150 m is mainly affected by rock salt dissolution,silicate mineral weathering dissolution,gypsum dissolution and cation exchange.
作者
吴平
闫中永
李英
黄小琴
徐兆祥
童彦钊
WU Ping;YAN Zhongyong;LI Ying;HUANG Xiaoqin;XU Zhaoxiang;TONG Yanzhao(Institute of Hydrogeology and Environmental Geology of Ningxia,Yinchuan 750011,China;Ningxia Institute of Geological Engineering,Yinchuan 750011,China;School of Water Resources&Environment,China University of Geosciences,Beijing 100083,China;Geological Bureau of Ningxia Hui Autonomous Region,Yinchuan 750021,China)
出处
《宁夏工程技术》
CAS
2019年第4期379-384,共6页
Ningxia Engineering Technology
基金
宁夏自然科学基金资助项目（2017A0426）
宁夏自然科学基金资助项目（2018AAC03205）
宁夏财政厅资助项目（6400201901273）
第三批宁夏青年科技人才托举工程（TJGC2018042）
