TEM Analysis of Seawater Intrusion of Groundwater Particles in Pearl River Delta,Guangzhou

The groundwater salinization has been a long time problem in Guangzhou region.This paper uses transmission electron microscopy(TEM)to explore the reason of groundwater salinization and to evaluate the salinization degree.This paper mainly observes the morphology of the groundwater particles and the degree of crystallization,structure and chemical composition to summary and conclude the particles characteristics,and then,the particles characteristics of groundwater are compared with the particles characteristics of seawater.At the end,this paper discusses the feasibility of application of particles characteristics on the salinization reason detection and evaluation.The results show that the Cl value in different particles is different in different salinization degree samples,and the higher salinization degree the higher the Cl value in the particles.Meanwhile,Sr,Ba elements in the groundwater particles are observed from the saline groundwater samples which is regarded as a tracer of ocean water.It means that the group of groundwater has disseminated by seawater in different degree.The results indicate that the groundwater particles of the study area inherit the particulate characteristics of ocean water particles.The reason of Guangzhou groundwater salinization is due to seawater intrusion.Therefore analysis and evaluation seawater intrusion via particles characteristics analysis is feasible.Similarly,this method also can be used for water pollution investigation and study of groundwater prospecting.