Figure 7. Model 25 row profile and local enlarged position
When the pumping time is 30 days, as shown in Figure 8 (a), the location
of the groundwater divide is 500 m from the pumping well. The water
levels of the three calculation points are 8.74 m, 8.91 m, and 8.19 m,
which could quantitatively describe the formation of the groundwater
divide. When pumping is carried out for 150 days, as shown in Figure 8
(b), the location of the
groundwater
divide gradually approaches the wetland boundary, 1700 m away from the
pumping well. When the pumping time is 270 days, as shown in Figure 8
(c), the groundwater divide extends to the wetland boundary, and the
surface water of the wetland begins to recharge the groundwater. In the
remainder of the simulation time, wetland surface water supplies
groundwater to the piedmont plain. Table 3 shows the groundwater levels
between the pumping well and the wetland at the three
calculation points at different
simulation times.