水资源保护2018，Vol.34Issue(3)：37-44,8.DOI:10.3880/j.issn.1004-6933.2018.03.06
重庆老龙洞岩溶地下水化学特征及影响因素
Hydrochemical characteristics of Laolongdong karst groundwater and its impact factors
摘要
Abstract
In order to study the differences of hydrochemical characteristics between Laolongdong ground river exist (G3) and epikarst springs (G1,G2) and its impact factors,the statistical approach was applied to analyze the monthly data of groundwater hydrochemistry in 2012.The results showed that the chemical composition of groundwater is mainly composed of Ca2+,Mg2+,HCO3-and SO42-,and the main type of hydrochemistry is Ca-HCO3.The concentration variation coefficient of Ca2+,Mg2+,HCO3-is small,which mainly come from carbonate rock dissolution and mainly be dissolved in limestone.Sulfuric acid and nitric acid are involved in the dissolution of carbonate rocks,in which sulphuric acid has greater influence on dissolution of carbonate rocks.However,affected by factors such as agricultural fertilization,livestock manure,enterprise waste water and domestic sewage,the concentration variation coefficients of SO42-,PO43-,Na+,K+,Cl-and NO3-in groundwater are larger,in which the concentration of SO42-,PO43-,Na+,K+,Cl-in underground river were higher than that in episkarst springs,but NO3-concentration in underground river was lower than that in episkarst springs.关键词
岩溶地下水/水化学特征/水-岩作用/影响因素/老龙洞Key words
karst groundwater/hydrochemical characteristic/water-rock interaction/impact factor/Laolongdong分类
资源环境引用本文复制引用
蓝家程,孙玉川,胡宁..重庆老龙洞岩溶地下水化学特征及影响因素[J].水资源保护,2018,34(3):37-44,8.基金项目
贵州省科学技术基金(黔科合J字[2015]2111号,黔科合基础[2017]1417) （黔科合J字[2015]2111号,黔科合基础[2017]1417）
中国地质调查局地质调查项目(DD20160305) （DD20160305）
贵州省科技合作计划项目(黔科合LH字[2015]7775号) （黔科合LH字[2015]7775号）
贵州师范大学2015年博士科研启动项目(600204) （600204）
