Seawater Intrusion-Retreat Processes and Groundwater Evolution in Intruded Coastal Aquifers with Land Reclamation: A Case Study of Eastern Jiangsu, China

Abstract The hydrogeochemical analysis and numerical simulation were conducted to explore the impact of land reclamation on submarine groundwater discharge evolution in seawater intrusion-retreat processes eastern Jiangsu, China. results indicated that origin salt most is saltwater mixing, weathering-dissolution minerals enriches fresh groundwater. path coastal Jiangsu Ca-Na-HCO3-Cl ? Ca-Na-Cl-HCO3 Na-Ca-Cl-HCO3 Na-Mg-HCO3 Na-Mg-HCO3-Cl Na-Cl-HCO3 Na-Cl, difference different regions obvious. revealed has blocked exchange restrained intrusion. sensitive permeability slope have dominated salinity distribution. And aquifer heterogeneity promotes leads irregular distribution Moreover, shallow with shows residual gradually desalinating discharged into sea. salinized by intrusion together then subsides a stable wedge. not fit intrusion, which caused coastline changes due anthropogenic natural activities.