A 3-DIMENSIONAL MISCIBLE TRANSPORT MODEL FOR SEAWATER INTRUSION IN CHINA

A three-dimensional miscible transport model for seawater intrusion in a phreatic aquifer with a transition zone is presented. This model co nsiders many important factors, such as the effect of variable density on fluid flow, the effect of precipitation infiltration and phreatic surface fluctuation on the process of seawater intrusion, the existenc e of great discharge pumping wells, etc. The difficulty in solving thi s problem can be tackled by the presented numerical method and iterati on technique. This model is used to describe seawater intrusion in Hua ngheying, Longkou, People's Republic of China. The simulated values ag ree very well with the field data (e.g., the total mean values of the absolute error of Cl- concentration are 46.13 mg/L and 55.67 mg/L, res pectively, and those of the water head are 0.24 m and 0.08 m, respecti vely).