首页 | 本学科首页   官方微博 | 高级检索  
     检索      


Processes of hydrogeochemical evolution of groundwater in the Guanzhong Basin,China
Authors:ZHANG Chun-chao  WANG Wen-Ke  SUN Yi-bo  LI Xiang-quan  HOU Xin-wei
Institution:1Institute of Hydrogeology and Environmental Geology, Shijiazhuang 050061, China.2School of Environmental Science and Engineering, Chang’an University, Xi’an 710054, China.3Key Laboratory of Subsurface Hydrology and Ecology in Arid Areas, Ministry of Education, China.4Engineering Research Center for Groundwater and Eco-Environment of Shaanxi Province, China.
Abstract:This paper analyzed regional hydrogeochemical evolution characteristics of groundwater with respect to hydrogeological conditions in the Guanzhong Basin, China. Coefficient variation in the subregion between the Shichuan River and Luo River of the Guanzhong Basin is larger than other subregions, reflecting the more complicated hydrogeological conditions of this subregion. The hydrochemical components and hydrodynamic conditions of this area have distinct horizontal zoning characteristics, and hydrodynamic conditions play a controlling role in the groundwater’s hydrochemistry. The relationship between ions, and between ions and TDS (total dissolved solids) can give an indication of many charteristics of grounwater such as evaporation intensity, ion exchange, and the sources of chemical components. Results indicated that for the coefficient of variation (the coefficient of variation is a statistical measure of the distribution or dispersion of data around mean. This measure is used to analyze the difference of spread in the data relative to the mean value. Coefficient of variation is derived by dividing the standard deviation by the mean), the minimum value of pH parameters is 0.03-0.07, the minimum value of HCO3- parameters is 0.24, while the maximum is the SO42- coefficinet at 1.67. A PHREEQC simulation demonstrated that different simulation paths roughly have the same trend in dissolution and precipitation of minerals. Along the direction of groundwater flow, the predminant precipitation is of calcite and gypsum and the cation exchange of Na+ and Ca2+ in some paths. However, in other paths, the precipitation of calcite and dissolution of gypsum and dolomite are the main actions, as well as the exchange of Mg2+ and Ca2+ in addition to Na+ and Ca2+.
Keywords:Hydrogeochemistry  Groundwater  Guanzhong Basin  Geochemical modelling
本文献已被 CNKI 等数据库收录!
点击此处可从《》浏览原始摘要信息
点击此处可从《》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号