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An iterative method was developed for incorporating the well bore boundary into the finite difference model of water flow in variably saturated porous media.Six cases were presented involving groundwater pumping or injection to demonstrate the advantages of the iterative method over the traditional method.For the iterative method,the total flux gradually approached the well discharge and the flux profile was non-uniform.And the iterative method took into account the variation of well bore water table.Compared to the traditional method,the iterative method can simulate the variably saturated flow caused by pumping or injection more realistically.