To simulate the and predict seawater intrusion into groundwater in Liao dong Bay coastal plain, China, a numerical model of variable-density groundwater flow and miscible salt transport is developed based on the SEAWAT code. The simulation was conducted for 55 months from October 2004 to April 2009. After calibration of the model, assuming all the hydrogeological conditions remain same as those in October 2009, the extent of seawater intrusion simulation was conducted for the next 40 years. The results show that seawater intrusion area will increase in all layers and seawater intrusion into Quaternary layer will be significantly faster than that into Minhuazhen group layer. It has come to the conclusion that protection of seawater intrusion contamination from the freshwater aquifers of Minhuazhen group layer is significantly necessary.
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