银川平原水化学特征分析

基于银川平原的水文地质条件,对研究区的地下水环境综合指标与地下水化学类型进行了分析:EC值与DO值呈负相关关系,随着含盐量的增高,EC值增高,DO值减小;TDS与EC之间存在较好的正相关性,水中溶解的盐类越多,水的TDS值越高,水的导电性越好,其电导率EC值越大。阳离子平均浓度由大到小为Na+〉Ca2+〉Mg2+〉K+〉NH4+,阴离子平均浓度由大到小为HCO3-〉SO42-〉Cl-。研究区地下水类型以HCO3·SO4—Ca·Mg、HCO3·SO4—Ca·Na、HCO3·SO4—Na·Mg,以及SO4·HCO3—Na·Mg等类型为主。活度系数与离子强度呈反比,即离子强度升高导致水溶液中的离子浓...

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Volume: 44
Main Author: 张兆迪 于开宁 刘景涛
Format: Journal Article
Language: Chinese
Place of publication: 2017
published in: 水文地质工程地质 Vol. 44; no. 2; pp. 23 - 30
Data of publication: 2017
ISSN: 1000-3665
Alternate Title: Analysis of characteristic of Hydrogeochemistry in Yinchuan plain
Bibliography: 11-2202/P
Based on the hydrogeological conditions of Yinchuan plain, the groundwater environmental comprehensive index and groundwater chemical types were analyzed: There is a negative correlation between DO and EC,the study also shows the positive correlation between EC and TDS,the increase of dissolved salts in groundwater leads to the increase of TDS,which makes the conductivity of groundwater and EC increased.The sort of average concentration of cation is Na+ 〉Ca2+〉 Mg2+〉K+〉 NH4+,and the sort of average concentration of anion is HCO3- 〉SO42- 〉Cl-. The groundwater chemical type of study area mainly include:HCO3·SO4—Ca·Mg,HCO3·SO4—Ca·Na,HCO3·SO4—Na·Mg,SO4·HCO3—Na·Mg. The study shows a negative correlation between activity coefficient and ionic strength: the increase of the ionic strength leads to the increase of the ions concentration and the charge in groundwater,which causes the ion to be reassembled into the solute,which leads to the decrease of activity coefficient of ionic. Calcite is closest to the equ
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