Hydrochemical Characteristics and Formation Mechanism of Groundwater in Qingdao City, Shandong Province, China

The coastal area is a major of socio-economic development and the most active zone for human activities. With rapid economy strengthening urban construction, groundwater environmental problems in areas are increasingly prominent. It significant to investigate chemical characteristics, hydrochemical types, factors that influence chemistry water resources protection development. In this paper, 48 samples 5 surface from study were analyzed with statistical analysis, Piper diagram, Gibbs mineral saturation index method, ionic scale factor, explored chemistry. modified Nemerow method was also applied evaluate groundwater. results show neutral weakly alkaline (average pH = 7.0~8.0). types mainly Cl·SO4-Na SO4·Cl-Ca·Mg. Hydrochemistry influenced by rock weathering evaporative concentration. TDS strongly correlated TDS, Na+, Mg2+, K+, Ca2+, Cl−, SO42−, showed gradual increase along drainage flow path, it indicates main ions originate dissolution halite, sulfate, carbonate. Combining GIS technology kriging spatial interpolation we obtained current situation map quality Laoshan District. III water, overall good; IV V distributed middle lower reaches rivers, belt pattern coastline. both factor seawater intrusion. utilization management intrusion addition, proposed research ideas methods provide reference genesis other world.