where K is the hydraulic conductivity; W represents the source‒sink term; D represents the extent of the simulation area; H represents the groundwater level; B is the elevation of the phreatic aquifer bottom; H1 is the initial groundwater level; q is the flow rate; μ is the specific yield; t is the time; τ1 is the Dirichlet condition; and τ2 is the Neumann condition.
The model is split into 50 rows and 100 columns, and according to the Zone Budget module in Visual MODFLOW, the wetland and piedmont plain aquifers are divided into two zones, zone 1 and zone 2, as shown in Figure 3. This is done to quantitatively calculate the changes in reduced base flow, induced infiltration and total water reduction due to pumping during the wetland–aquifer interaction.