Study on hydrochemical characteristics and formation mechanism of shallow groundwater in eastern Songnen Plain

作者：LI Xiao-han,WANG Rui,LI Jian-feng

摘要：Under the influence of global climate changes and human activities,the Songnen Plain’s groundwater environment is deteriorating,which becomes an important factor restricting the social economic development and ecological balance.As a relatively independent water system in the Songnen Plain,the groundwater system of the Songhua River provides the main water sources for industry,agriculture,life and other aspects.According to the hydrogeological investigation,groundwater sample collection and testing in the eastern Songnen Plain,descriptive statistics analysis,piper diagram,Gibbs diagram and reverse hydrogeochemical simulation were used to analyze the hydrochemical characteristics and evolution laws of regional groundwater.The results of this study show that HCO3^-and Ca^2+are the main anion and cation in the groundwater;the formation of groundwater chemical components are controlled by topographic and geomorphic factors and groundwater occurrence conditions;groundwater subarea of the Lalin-Ashi River is mainly controlled by weathering-dissolution process,and evaporation and ion-exchange reactions are more obvious in groundwater subarea of the Hulan-Tongken River,whose chemical composition also affects the valley plain groundwater subarea in the discharge area;in addition,local high intensity withdrawal causes abnormal hydrochemical evolution processes.The research results can offer scientific basis for rational utilization and protection of groundwater.

发文机构：Institute of Hydrogeology and Environmental Geology Team of Groundwater Resource Evaluation and Protection School of Water Resources and Environment Hebei Province Key Laboratory of Sustained Utilization and Development of Water Resources

关键词：TheSongnenPLAINGROUNDWATERHydrochemicalcharacteristicsHydrogeochemicalMODELINGFORMATION

分类号： TV[水利工程]